Отправка

.gitattributes

@@ -0,0 +1,63 @@
+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+#*.cs     diff=csharp
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following 
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just uncomment the entries below
+###############################################################################
+#*.sln       merge=binary
+#*.csproj    merge=binary
+#*.vbproj    merge=binary
+#*.vcxproj   merge=binary
+#*.vcproj    merge=binary
+#*.dbproj    merge=binary
+#*.fsproj    merge=binary
+#*.lsproj    merge=binary
+#*.wixproj   merge=binary
+#*.modelproj merge=binary
+#*.sqlproj   merge=binary
+#*.wwaproj   merge=binary
+
+###############################################################################
+# behavior for image files
+#
+# image files are treated as binary by default.
+###############################################################################
+#*.jpg   binary
+#*.png   binary
+#*.gif   binary
+
+###############################################################################
+# diff behavior for common document formats
+# 
+# Convert binary document formats to text before diffing them. This feature
+# is only available from the command line. Turn it on by uncommenting the 
+# entries below.
+###############################################################################
+#*.doc   diff=astextplain
+#*.DOC   diff=astextplain
+#*.docx  diff=astextplain
+#*.DOCX  diff=astextplain
+#*.dot   diff=astextplain
+#*.DOT   diff=astextplain
+#*.pdf   diff=astextplain
+#*.PDF   diff=astextplain
+#*.rtf   diff=astextplain
+#*.RTF   diff=astextplain

.gitignore

@@ -0,0 +1,363 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Oo]ut/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd

App.config

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Numerics.Vectors" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.1.4.0" newVersion="4.1.4.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks.Extensions" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.2.0.1" newVersion="4.2.0.1" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.ValueTuple" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.2" newVersion="4.0.1.2" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>

ClientForm.Designer.cs

@@ -0,0 +1,132 @@
+namespace PhotoStudioApp
+{
+    partial class ClientForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.dgvClients = new System.Windows.Forms.DataGridView();
+            this.btnAdd = new System.Windows.Forms.Button();
+            this.btnEdit = new System.Windows.Forms.Button();
+            this.btnDelete = new System.Windows.Forms.Button();
+            this.btnClose = new System.Windows.Forms.Button();
+            this.lblTitle = new System.Windows.Forms.Label();
+            ((System.ComponentModel.ISupportInitialize)(this.dgvClients)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // dgvClients
+            // 
+            this.dgvClients.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
+            this.dgvClients.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dgvClients.Location = new System.Drawing.Point(27, 74);
+            this.dgvClients.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.dgvClients.MultiSelect = false;
+            this.dgvClients.Name = "dgvClients";
+            this.dgvClients.ReadOnly = true;
+            this.dgvClients.RowHeadersWidth = 51;
+            this.dgvClients.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
+            this.dgvClients.Size = new System.Drawing.Size(922, 431);
+            this.dgvClients.TabIndex = 0;
+            // 
+            // btnAdd
+            // 
+            this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnAdd.Location = new System.Drawing.Point(27, 537);
+            this.btnAdd.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnAdd.Name = "btnAdd";
+            this.btnAdd.Size = new System.Drawing.Size(195, 40);
+            this.btnAdd.TabIndex = 1;
+            this.btnAdd.Text = "Добавить клиента";
+            this.btnAdd.UseVisualStyleBackColor = true;
+            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
+            // 
+            // btnEdit
+            // 
+            this.btnEdit.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnEdit.Location = new System.Drawing.Point(230, 537);
+            this.btnEdit.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnEdit.Name = "btnEdit";
+            this.btnEdit.Size = new System.Drawing.Size(175, 40);
+            this.btnEdit.TabIndex = 2;
+            this.btnEdit.Text = "Редактировать";
+            this.btnEdit.UseVisualStyleBackColor = true;
+            this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
+            // 
+            // btnDelete
+            // 
+            this.btnDelete.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnDelete.Location = new System.Drawing.Point(413, 537);
+            this.btnDelete.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnDelete.Name = "btnDelete";
+            this.btnDelete.Size = new System.Drawing.Size(160, 40);
+            this.btnDelete.TabIndex = 3;
+            this.btnDelete.Text = "Удалить";
+            this.btnDelete.UseVisualStyleBackColor = true;
+            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
+            // 
+            // btnClose
+            // 
+            this.btnClose.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnClose.Location = new System.Drawing.Point(581, 537);
+            this.btnClose.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnClose.Name = "btnClose";
+            this.btnClose.Size = new System.Drawing.Size(160, 40);
+            this.btnClose.TabIndex = 4;
+            this.btnClose.Text = "Закрыть";
+            this.btnClose.UseVisualStyleBackColor = true;
+            this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblTitle.Location = new System.Drawing.Point(27, 25);
+            this.lblTitle.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(313, 29);
+            this.lblTitle.TabIndex = 5;
+            this.lblTitle.Text = "Управление клиентами";
+            // 
+            // ClientForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(962, 623);
+            this.Controls.Add(this.lblTitle);
+            this.Controls.Add(this.btnClose);
+            this.Controls.Add(this.btnDelete);
+            this.Controls.Add(this.btnEdit);
+            this.Controls.Add(this.btnAdd);
+            this.Controls.Add(this.dgvClients);
+            this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.Name = "ClientForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Управление клиентами";
+            ((System.ComponentModel.ISupportInitialize)(this.dgvClients)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.DataGridView dgvClients;
+        private System.Windows.Forms.Button btnAdd;
+        private System.Windows.Forms.Button btnEdit;
+        private System.Windows.Forms.Button btnDelete;
+        private System.Windows.Forms.Button btnClose;
+        private System.Windows.Forms.Label lblTitle;
+    }
+}

ClientForm.cs

@@ -0,0 +1,162 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class ClientForm : Form
+    {
+        private string _connectionString;
+
+        public ClientForm(string connectionString)
+        {
+            InitializeComponent();
+            _connectionString = connectionString;
+            LoadClients();
+        }
+
+        private void LoadClients()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql = "select client_id, last_name, first_name, middle_name, phone from clients";
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(sql, conn);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                dgvClients.DataSource = dt;
+                if (dgvClients.Columns.Contains("client_id"))
+                {
+                    dgvClients.Columns["client_id"].Visible = false;
+                }
+            }
+        }
+
+        private string GetSHA256Hash(string input)
+        {
+            using (System.Security.Cryptography.SHA256 sha256 = System.Security.Cryptography.SHA256.Create())
+            {
+                byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
+                byte[] hashBytes = sha256.ComputeHash(inputBytes);
+                return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
+            }
+        }
+
+        private void btnAdd_Click(object sender, EventArgs e)
+        {
+            string lastName = Microsoft.VisualBasic.Interaction.InputBox("Введите фамилию", "Добавление клиента");
+            if (!string.IsNullOrEmpty(lastName))
+            {
+                string firstName = Microsoft.VisualBasic.Interaction.InputBox("Введите имя", "Добавление клиента");
+                string middleName = Microsoft.VisualBasic.Interaction.InputBox("Введите отчество (необязательно)", "Добавление клиента");
+                string phone = Microsoft.VisualBasic.Interaction.InputBox("Введите телефон", "Добавление клиента");
+
+                using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                {
+                    conn.Open();
+
+                    // 1. Создаём пользователя
+                    string login = lastName.ToLower() + "_" + firstName.ToLower();
+                    string passwordHash = GetSHA256Hash("123"); // пароль по умолчанию
+
+                    string userSql = "insert into users (login, password_hash, role_id) values (@login, @hash, 2) returning user_id";
+                    NpgsqlCommand userCmd = new NpgsqlCommand(userSql, conn);
+                    userCmd.Parameters.AddWithValue("@login", login);
+                    userCmd.Parameters.AddWithValue("@hash", passwordHash);
+
+                    int userId = Convert.ToInt32(userCmd.ExecuteScalar());
+
+                    // 2. Создаём клиента с полученным user_id
+                    string clientSql = "insert into clients (user_id, last_name, first_name, middle_name, phone) values (@userId, @lastName, @firstName, @middleName, @phone)";
+                    NpgsqlCommand clientCmd = new NpgsqlCommand(clientSql, conn);
+                    clientCmd.Parameters.AddWithValue("@userId", userId);
+                    clientCmd.Parameters.AddWithValue("@lastName", lastName);
+                    clientCmd.Parameters.AddWithValue("@firstName", firstName);
+                    clientCmd.Parameters.AddWithValue("@middleName", middleName);
+                    clientCmd.Parameters.AddWithValue("@phone", phone);
+                    clientCmd.ExecuteNonQuery();
+
+                    MessageBox.Show($"Клиент добавлен! Логин: {login}, пароль: 123");
+                    LoadClients();
+                }
+            }
+        }
+
+        private void btnEdit_Click(object sender, EventArgs e)
+        {
+            if (dgvClients.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvClients.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int clientId = (int)rowView["client_id"];
+                    string currentLastName = rowView["last_name"].ToString();
+                    string currentFirstName = rowView["first_name"].ToString();
+                    string currentMiddleName = rowView["middle_name"].ToString();
+                    string currentPhone = rowView["phone"].ToString();
+
+                    string lastName = Microsoft.VisualBasic.Interaction.InputBox("Фамилия", "Редактирование", currentLastName);
+                    string firstName = Microsoft.VisualBasic.Interaction.InputBox("Имя", "Редактирование", currentFirstName);
+                    string middleName = Microsoft.VisualBasic.Interaction.InputBox("Отчество", "Редактирование", currentMiddleName);
+                    string phone = Microsoft.VisualBasic.Interaction.InputBox("Телефон", "Редактирование", currentPhone);
+
+                    using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                    {
+                        conn.Open();
+                        string sql = "update clients set last_name = @lastName, first_name = @firstName, middle_name = @middleName, phone = @phone where client_id = @clientId";
+                        NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                        cmd.Parameters.AddWithValue("@lastName", lastName);
+                        cmd.Parameters.AddWithValue("@firstName", firstName);
+                        cmd.Parameters.AddWithValue("@middleName", middleName);
+                        cmd.Parameters.AddWithValue("@phone", phone);
+                        cmd.Parameters.AddWithValue("@clientId", clientId);
+                        cmd.ExecuteNonQuery();
+                        MessageBox.Show("Клиент обновлён");
+                        LoadClients();
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите клиента для редактирования");
+            }
+        }
+
+        private void btnDelete_Click(object sender, EventArgs e)
+        {
+            if (dgvClients.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvClients.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int clientId = (int)rowView["client_id"];
+                    if (MessageBox.Show("Удалить клиента?", "Подтверждение", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            // Сначала удаляем клиента
+                            string sql = "delete from clients where client_id = @clientId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@clientId", clientId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Клиент удалён");
+                            LoadClients();
+                        }
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите клиента для удаления");
+            }
+        }
+
+        private void btnClose_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

ClientForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

LoginForm.Designer.cs

@@ -0,0 +1,94 @@
+namespace PhotoStudioApp
+{
+    partial class LoginForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.lblLogin = new System.Windows.Forms.Label();
+            this.lblPassword = new System.Windows.Forms.Label();
+            this.txtLogin = new System.Windows.Forms.TextBox();
+            this.txtPassword = new System.Windows.Forms.TextBox();
+            this.btnLogin = new System.Windows.Forms.Button();
+            this.SuspendLayout();
+
+            // lblLogin
+            this.lblLogin.AutoSize = true;
+            this.lblLogin.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblLogin.Location = new System.Drawing.Point(50, 60);
+            this.lblLogin.Name = "lblLogin";
+            this.lblLogin.Size = new System.Drawing.Size(55, 20);
+            this.lblLogin.TabIndex = 0;
+            this.lblLogin.Text = "Логин:";
+
+            // lblPassword
+            this.lblPassword.AutoSize = true;
+            this.lblPassword.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblPassword.Location = new System.Drawing.Point(50, 110);
+            this.lblPassword.Name = "lblPassword";
+            this.lblPassword.Size = new System.Drawing.Size(67, 20);
+            this.lblPassword.TabIndex = 1;
+            this.lblPassword.Text = "Пароль:";
+
+            // txtLogin
+            this.txtLogin.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.txtLogin.Location = new System.Drawing.Point(150, 57);
+            this.txtLogin.Name = "txtLogin";
+            this.txtLogin.Size = new System.Drawing.Size(200, 26);
+            this.txtLogin.TabIndex = 2;
+
+            // txtPassword
+            this.txtPassword.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.txtPassword.Location = new System.Drawing.Point(150, 107);
+            this.txtPassword.Name = "txtPassword";
+            this.txtPassword.PasswordChar = '*';
+            this.txtPassword.Size = new System.Drawing.Size(200, 26);
+            this.txtPassword.TabIndex = 3;
+
+            // btnLogin
+            this.btnLogin.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnLogin.Location = new System.Drawing.Point(150, 160);
+            this.btnLogin.Name = "btnLogin";
+            this.btnLogin.Size = new System.Drawing.Size(150, 35);
+            this.btnLogin.TabIndex = 4;
+            this.btnLogin.Text = "Войти";
+            this.btnLogin.UseVisualStyleBackColor = true;
+            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
+
+            // LoginForm
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(400, 250);
+            this.Controls.Add(this.btnLogin);
+            this.Controls.Add(this.txtPassword);
+            this.Controls.Add(this.txtLogin);
+            this.Controls.Add(this.lblPassword);
+            this.Controls.Add(this.lblLogin);
+            this.Name = "LoginForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Вход в систему";
+            this.ResumeLayout(false);
+            this.PerformLayout();
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label lblLogin;
+        private System.Windows.Forms.Label lblPassword;
+        private System.Windows.Forms.TextBox txtLogin;
+        private System.Windows.Forms.TextBox txtPassword;
+        private System.Windows.Forms.Button btnLogin;
+    }
+}

LoginForm.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class LoginForm : Form
+    {
+        private string connectionString = "Host=245e1-rw.db.pub.dbaas.postgrespro.ru;Port=5432;Database=dbproject;Username=smirnova_ul;Password=Q#Rto%g$$$5;SSL Mode=Require;Trust Server Certificate=true;";
+
+        public LoginForm()
+        {
+            InitializeComponent();
+        }
+
+        private void btnLogin_Click(object sender, EventArgs e)
+        {
+            string login = txtLogin.Text;
+            string password = txtPassword.Text;
+            string hash = GetSHA256Hash(password);
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
+            {
+                conn.Open();
+                string sql = "select u.user_id, r.role_name from users u join roles r on u.role_id = r.role_id where u.login = @login and u.password_hash = @hash";
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@login", login);
+                cmd.Parameters.AddWithValue("@hash", hash);
+
+                using (NpgsqlDataReader reader = cmd.ExecuteReader())
+                {
+                    if (reader.Read())
+                    {
+                        int userId = reader.GetInt32(0);
+                        string role = reader.GetString(1);
+                        MessageBox.Show($"Добро пожаловать, {login}! Роль: {role}");
+
+                        MainForm mainForm = new MainForm(userId, role, login, connectionString);
+                        mainForm.Show();
+                        this.Hide();
+                    }
+                    else
+                    {
+                        MessageBox.Show("Неверный логин или пароль");
+                    }
+                }
+            }
+        }
+
+        private string GetSHA256Hash(string input)
+        {
+            using (System.Security.Cryptography.SHA256 sha256 = System.Security.Cryptography.SHA256.Create())
+            {
+                byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
+                byte[] hashBytes = sha256.ComputeHash(inputBytes);
+                return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
+            }
+        }
+
+        protected override void OnFormClosing(FormClosingEventArgs e)
+        {
+            if (this.Owner == null)
+            {
+                Application.Exit();
+            }
+            base.OnFormClosing(e);
+        }
+    }
+}

MainForm.Designer.cs

@@ -0,0 +1,190 @@
+namespace PhotoStudioApp
+{
+    partial class MainForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.dgvOrders = new System.Windows.Forms.DataGridView();
+            this.btnAdd = new System.Windows.Forms.Button();
+            this.btnEdit = new System.Windows.Forms.Button();
+            this.btnDelete = new System.Windows.Forms.Button();
+            this.btnSearch = new System.Windows.Forms.Button();
+            this.btnReport = new System.Windows.Forms.Button();
+            this.btnLogout = new System.Windows.Forms.Button();
+            this.btnServices = new System.Windows.Forms.Button();
+            this.btnClients = new System.Windows.Forms.Button();
+            this.lblTitle = new System.Windows.Forms.Label();
+            ((System.ComponentModel.ISupportInitialize)(this.dgvOrders)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // dgvOrders
+            // 
+            this.dgvOrders.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
+            this.dgvOrders.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dgvOrders.Location = new System.Drawing.Point(27, 74);
+            this.dgvOrders.Margin = new System.Windows.Forms.Padding(4);
+            this.dgvOrders.MultiSelect = false;
+            this.dgvOrders.Name = "dgvOrders";
+            this.dgvOrders.ReadOnly = true;
+            this.dgvOrders.RowHeadersWidth = 51;
+            this.dgvOrders.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
+            this.dgvOrders.Size = new System.Drawing.Size(912, 431);
+            this.dgvOrders.TabIndex = 0;
+            // 
+            // btnAdd
+            // 
+            this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnAdd.Location = new System.Drawing.Point(27, 517);
+            this.btnAdd.Margin = new System.Windows.Forms.Padding(4);
+            this.btnAdd.Name = "btnAdd";
+            this.btnAdd.Size = new System.Drawing.Size(180, 40);
+            this.btnAdd.TabIndex = 1;
+            this.btnAdd.Text = "Добавить заказ";
+            this.btnAdd.UseVisualStyleBackColor = true;
+            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
+            // 
+            // btnEdit
+            // 
+            this.btnEdit.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnEdit.Location = new System.Drawing.Point(215, 517);
+            this.btnEdit.Margin = new System.Windows.Forms.Padding(4);
+            this.btnEdit.Name = "btnEdit";
+            this.btnEdit.Size = new System.Drawing.Size(180, 40);
+            this.btnEdit.TabIndex = 2;
+            this.btnEdit.Text = "Редактировать";
+            this.btnEdit.UseVisualStyleBackColor = true;
+            this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
+            // 
+            // btnDelete
+            // 
+            this.btnDelete.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnDelete.Location = new System.Drawing.Point(403, 517);
+            this.btnDelete.Margin = new System.Windows.Forms.Padding(4);
+            this.btnDelete.Name = "btnDelete";
+            this.btnDelete.Size = new System.Drawing.Size(160, 40);
+            this.btnDelete.TabIndex = 3;
+            this.btnDelete.Text = "Удалить";
+            this.btnDelete.UseVisualStyleBackColor = true;
+            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
+            // 
+            // btnSearch
+            // 
+            this.btnSearch.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnSearch.Location = new System.Drawing.Point(571, 517);
+            this.btnSearch.Margin = new System.Windows.Forms.Padding(4);
+            this.btnSearch.Name = "btnSearch";
+            this.btnSearch.Size = new System.Drawing.Size(180, 40);
+            this.btnSearch.TabIndex = 4;
+            this.btnSearch.Text = "Поиск по услуге";
+            this.btnSearch.UseVisualStyleBackColor = true;
+            this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
+            // 
+            // btnReport
+            // 
+            this.btnReport.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnReport.Location = new System.Drawing.Point(759, 517);
+            this.btnReport.Margin = new System.Windows.Forms.Padding(4);
+            this.btnReport.Name = "btnReport";
+            this.btnReport.Size = new System.Drawing.Size(180, 40);
+            this.btnReport.TabIndex = 5;
+            this.btnReport.Text = "Отчёт по датам";
+            this.btnReport.UseVisualStyleBackColor = true;
+            this.btnReport.Click += new System.EventHandler(this.btnReport_Click);
+            // 
+            // btnLogout
+            // 
+            this.btnLogout.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnLogout.Location = new System.Drawing.Point(829, 565);
+            this.btnLogout.Margin = new System.Windows.Forms.Padding(4);
+            this.btnLogout.Name = "btnLogout";
+            this.btnLogout.Size = new System.Drawing.Size(110, 40);
+            this.btnLogout.TabIndex = 6;
+            this.btnLogout.Text = "Выход";
+            this.btnLogout.UseVisualStyleBackColor = true;
+            this.btnLogout.Click += new System.EventHandler(this.btnLogout_Click);
+            // 
+            // btnServices
+            // 
+            this.btnServices.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnServices.Location = new System.Drawing.Point(143, 564);
+            this.btnServices.Name = "btnServices";
+            this.btnServices.Size = new System.Drawing.Size(110, 40);
+            this.btnServices.TabIndex = 8;
+            this.btnServices.Text = "Услуги";
+            this.btnServices.UseVisualStyleBackColor = true;
+            this.btnServices.Click += new System.EventHandler(this.btnServices_Click);
+            // 
+            // btnClients
+            // 
+            this.btnClients.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnClients.Location = new System.Drawing.Point(27, 564);
+            this.btnClients.Name = "btnClients";
+            this.btnClients.Size = new System.Drawing.Size(110, 40);
+            this.btnClients.TabIndex = 9;
+            this.btnClients.Text = "Клиенты";
+            this.btnClients.UseVisualStyleBackColor = true;
+            this.btnClients.Click += new System.EventHandler(this.btnClients_Click);
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblTitle.Location = new System.Drawing.Point(27, 25);
+            this.lblTitle.Margin = new System.Windows.Forms.Padding(4);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(293, 29);
+            this.lblTitle.TabIndex = 7;
+            this.lblTitle.Text = "Управление заказами";
+            // 
+            // MainForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(962, 623);
+            this.Controls.Add(this.btnClients);
+            this.Controls.Add(this.btnServices);
+            this.Controls.Add(this.lblTitle);
+            this.Controls.Add(this.btnLogout);
+            this.Controls.Add(this.btnReport);
+            this.Controls.Add(this.btnSearch);
+            this.Controls.Add(this.btnDelete);
+            this.Controls.Add(this.btnEdit);
+            this.Controls.Add(this.btnAdd);
+            this.Controls.Add(this.dgvOrders);
+            this.Margin = new System.Windows.Forms.Padding(4);
+            this.Name = "MainForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Фотостудия - Главная";
+            ((System.ComponentModel.ISupportInitialize)(this.dgvOrders)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.DataGridView dgvOrders;
+        private System.Windows.Forms.Button btnAdd;
+        private System.Windows.Forms.Button btnEdit;
+        private System.Windows.Forms.Button btnDelete;
+        private System.Windows.Forms.Button btnSearch;
+        private System.Windows.Forms.Button btnReport;
+        private System.Windows.Forms.Button btnLogout;
+        private System.Windows.Forms.Button btnServices;
+        private System.Windows.Forms.Button btnClients;
+        private System.Windows.Forms.Label lblTitle;
+    }
+}

MainForm.cs

@@ -0,0 +1,294 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class MainForm : Form
+    {
+        private int _userId;
+        private string _role;
+        private string _login;
+        private string _connectionString;
+
+        public MainForm(int userId, string role, string login, string connectionString)
+        {
+            InitializeComponent();
+            _userId = userId;
+            _role = role;
+            _login = login;
+            _connectionString = connectionString;
+
+            // Настройка доступных кнопок в зависимости от роли
+            if (_role == "client")
+            {
+                btnAdd.Enabled = false;
+                btnDelete.Enabled = false;
+                btnEdit.Enabled = false;
+                btnServices.Enabled = false;
+                btnClients.Enabled = false;
+            }
+
+            LoadOrders();
+        }
+
+        private void LoadOrders()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql;
+                if (_role == "admin")
+                {
+                    sql = "select * from v_orders_with_total order by order_date desc";
+                }
+                else
+                {
+                    sql = @"
+                        select 
+                            o.order_id,
+                            s.service_name,
+                            o.order_date,
+                            s.price as total_amount
+                        from orders o
+                        join services s on o.service_id = s.service_id
+                        join clients c on o.client_id = c.client_id
+                        join users u on c.user_id = u.user_id
+                        where u.login = @login";
+                }
+
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                if (_role != "admin")
+                {
+                    cmd.Parameters.AddWithValue("@login", _login);
+                }
+
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(cmd);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                // Скрываем столбцы с ID из отображения
+                if (dt.Columns.Contains("client_id")) dt.Columns.Remove("client_id");
+                if (dt.Columns.Contains("employee_id")) dt.Columns.Remove("employee_id");
+                if (dt.Columns.Contains("service_id")) dt.Columns.Remove("service_id");
+
+                dgvOrders.DataSource = dt;
+                if (dgvOrders.Columns.Contains("order_id"))
+                {
+                    dgvOrders.Columns["order_id"].Visible = false;
+                }
+            }
+        }
+
+        private void btnAdd_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может добавлять заказы.");
+                return;
+            }
+
+            OrderForm orderForm = new OrderForm(_connectionString);
+            orderForm.ShowDialog();
+            LoadOrders();
+        }
+
+        private void btnEdit_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может редактировать заказы.");
+                return;
+            }
+
+            if (dgvOrders.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvOrders.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int orderId = (int)rowView["order_id"];
+                    OrderForm orderForm = new OrderForm(_connectionString, orderId);
+                    orderForm.ShowDialog();
+                    LoadOrders();
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите заказ для редактирования");
+            }
+        }
+
+        private void btnDelete_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может удалять заказы.");
+                return;
+            }
+
+            if (dgvOrders.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvOrders.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int orderId = (int)rowView["order_id"];
+                    if (MessageBox.Show("Удалить заказ?", "Подтверждение", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            string sql = "delete from orders where order_id = @orderId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@orderId", orderId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Заказ удалён");
+                            LoadOrders();
+                        }
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите заказ для удаления");
+            }
+        }
+
+        private void btnSearch_Click(object sender, EventArgs e)
+        {
+            string serviceName = Microsoft.VisualBasic.Interaction.InputBox("Введите название услуги", "Поиск", "wedding");
+            if (!string.IsNullOrEmpty(serviceName))
+            {
+                using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                {
+                    conn.Open();
+                    string sql;
+                    if (_role == "admin")
+                    {
+                        sql = "select * from get_orders_by_service_today(@serviceName)";
+                    }
+                    else
+                    {
+                        sql = @"
+                            select 
+                                o.order_id,
+                                s.service_name,
+                                o.order_date,
+                                s.price as total_amount
+                            from orders o
+                            join services s on o.service_id = s.service_id
+                            join clients c on o.client_id = c.client_id
+                            join users u on c.user_id = u.user_id
+                            where s.service_name = @serviceName
+                              and u.login = @login";
+                    }
+
+                    NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                    cmd.Parameters.AddWithValue("@serviceName", serviceName);
+                    if (_role != "admin")
+                    {
+                        cmd.Parameters.AddWithValue("@login", _login);
+                    }
+
+                    NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(cmd);
+                    DataTable dt = new DataTable();
+                    adapter.Fill(dt);
+
+                    // Скрываем столбцы с ID
+                    if (dt.Columns.Contains("client_id")) dt.Columns.Remove("client_id");
+                    if (dt.Columns.Contains("employee_id")) dt.Columns.Remove("employee_id");
+                    if (dt.Columns.Contains("service_id")) dt.Columns.Remove("service_id");
+
+                    dgvOrders.DataSource = dt;
+                    if (dgvOrders.Columns.Contains("order_id"))
+                    {
+                        dgvOrders.Columns["order_id"].Visible = false;
+                    }
+                }
+            }
+        }
+
+        private void btnReport_Click(object sender, EventArgs e)
+        {
+            DateTime start = DateTime.Now.AddDays(-30);
+            DateTime end = DateTime.Now;
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql;
+                if (_role == "admin")
+                {
+                    sql = "select * from v_orders_with_total where order_date between @start and @end";
+                }
+                else
+                {
+                    sql = @"
+                        select 
+                            o.order_id,
+                            s.service_name,
+                            o.order_date,
+                            s.price as total_amount
+                        from orders o
+                        join services s on o.service_id = s.service_id
+                        join clients c on o.client_id = c.client_id
+                        join users u on c.user_id = u.user_id
+                        where o.order_date between @start and @end
+                          and u.login = @login";
+                }
+
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@start", start);
+                cmd.Parameters.AddWithValue("@end", end);
+                if (_role != "admin")
+                {
+                    cmd.Parameters.AddWithValue("@login", _login);
+                }
+
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(cmd);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                // Скрываем столбцы с ID
+                if (dt.Columns.Contains("client_id")) dt.Columns.Remove("client_id");
+                if (dt.Columns.Contains("employee_id")) dt.Columns.Remove("employee_id");
+                if (dt.Columns.Contains("service_id")) dt.Columns.Remove("service_id");
+
+                dgvOrders.DataSource = dt;
+                if (dgvOrders.Columns.Contains("order_id"))
+                {
+                    dgvOrders.Columns["order_id"].Visible = false;
+                }
+            }
+        }
+
+        private void btnServices_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может управлять услугами.");
+                return;
+            }
+            ServiceForm serviceForm = new ServiceForm(_connectionString);
+            serviceForm.ShowDialog();
+        }
+
+        private void btnClients_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может управлять клиентами.");
+                return;
+            }
+            ClientForm clientForm = new ClientForm(_connectionString);
+            clientForm.ShowDialog();
+        }
+
+        private void btnLogout_Click(object sender, EventArgs e)
+        {
+            this.Close();
+            LoginForm loginForm = new LoginForm();
+            loginForm.Show();
+        }
+    }
+}

MainForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

OrderForm.Designer.cs

@@ -0,0 +1,131 @@
+namespace PhotoStudioApp
+{
+    partial class OrderForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.lblClient = new System.Windows.Forms.Label();
+            this.lblEmployee = new System.Windows.Forms.Label();
+            this.lblService = new System.Windows.Forms.Label();
+            this.cmbClient = new System.Windows.Forms.ComboBox();
+            this.cmbEmployee = new System.Windows.Forms.ComboBox();
+            this.cmbService = new System.Windows.Forms.ComboBox();
+            this.btnSave = new System.Windows.Forms.Button();
+            this.btnCancel = new System.Windows.Forms.Button();
+            this.SuspendLayout();
+
+            // lblClient
+            this.lblClient.AutoSize = true;
+            this.lblClient.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblClient.Location = new System.Drawing.Point(30, 30);
+            this.lblClient.Name = "lblClient";
+            this.lblClient.Size = new System.Drawing.Size(97, 18);
+            this.lblClient.TabIndex = 0;
+            this.lblClient.Text = "Клиент:";
+
+            // lblEmployee
+            this.lblEmployee.AutoSize = true;
+            this.lblEmployee.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblEmployee.Location = new System.Drawing.Point(30, 70);
+            this.lblEmployee.Name = "lblEmployee";
+            this.lblEmployee.Size = new System.Drawing.Size(112, 18);
+            this.lblEmployee.TabIndex = 1;
+            this.lblEmployee.Text = "Сотрудник:";
+
+            // lblService
+            this.lblService.AutoSize = true;
+            this.lblService.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblService.Location = new System.Drawing.Point(30, 110);
+            this.lblService.Name = "lblService";
+            this.lblService.Size = new System.Drawing.Size(89, 18);
+            this.lblService.TabIndex = 2;
+            this.lblService.Text = "Услуга:";
+
+            // cmbClient
+            this.cmbClient.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.cmbClient.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.cmbClient.Location = new System.Drawing.Point(160, 27);
+            this.cmbClient.Name = "cmbClient";
+            this.cmbClient.Size = new System.Drawing.Size(200, 26);
+            this.cmbClient.TabIndex = 3;
+
+            // cmbEmployee
+            this.cmbEmployee.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.cmbEmployee.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.cmbEmployee.Location = new System.Drawing.Point(160, 67);
+            this.cmbEmployee.Name = "cmbEmployee";
+            this.cmbEmployee.Size = new System.Drawing.Size(200, 26);
+            this.cmbEmployee.TabIndex = 4;
+
+            // cmbService
+            this.cmbService.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.cmbService.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.cmbService.Location = new System.Drawing.Point(160, 107);
+            this.cmbService.Name = "cmbService";
+            this.cmbService.Size = new System.Drawing.Size(200, 26);
+            this.cmbService.TabIndex = 5;
+
+            // btnSave
+            this.btnSave.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnSave.Location = new System.Drawing.Point(50, 160);
+            this.btnSave.Name = "btnSave";
+            this.btnSave.Size = new System.Drawing.Size(100, 35);
+            this.btnSave.TabIndex = 6;
+            this.btnSave.Text = "Сохранить";
+            this.btnSave.UseVisualStyleBackColor = true;
+            this.btnSave.Click += new System.EventHandler(this.btnSave_Click);
+
+            // btnCancel
+            this.btnCancel.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnCancel.Location = new System.Drawing.Point(170, 160);
+            this.btnCancel.Name = "btnCancel";
+            this.btnCancel.Size = new System.Drawing.Size(100, 35);
+            this.btnCancel.TabIndex = 7;
+            this.btnCancel.Text = "Отмена";
+            this.btnCancel.UseVisualStyleBackColor = true;
+            this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
+
+            // OrderForm
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(400, 220);
+            this.Controls.Add(this.btnCancel);
+            this.Controls.Add(this.btnSave);
+            this.Controls.Add(this.cmbService);
+            this.Controls.Add(this.cmbEmployee);
+            this.Controls.Add(this.cmbClient);
+            this.Controls.Add(this.lblService);
+            this.Controls.Add(this.lblEmployee);
+            this.Controls.Add(this.lblClient);
+            this.Name = "OrderForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Заказ";
+            this.ResumeLayout(false);
+            this.PerformLayout();
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label lblClient;
+        private System.Windows.Forms.Label lblEmployee;
+        private System.Windows.Forms.Label lblService;
+        private System.Windows.Forms.ComboBox cmbClient;
+        private System.Windows.Forms.ComboBox cmbEmployee;
+        private System.Windows.Forms.ComboBox cmbService;
+        private System.Windows.Forms.Button btnSave;
+        private System.Windows.Forms.Button btnCancel;
+    }
+}

OrderForm.cs

@@ -0,0 +1,132 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class OrderForm : Form
+    {
+        private string _connectionString;
+        private int? _orderId;
+
+        public OrderForm(string connectionString, int? orderId = null)
+        {
+            InitializeComponent();
+            _connectionString = connectionString;
+            _orderId = orderId;
+
+            LoadComboBoxes();
+
+            if (_orderId.HasValue)
+            {
+                LoadOrderData();
+            }
+        }
+
+        private void LoadComboBoxes()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+
+                // Загружаем клиентов
+                string clientSql = "select client_id, last_name || ' ' || first_name as name from clients";
+                NpgsqlDataAdapter clientAdapter = new NpgsqlDataAdapter(clientSql, conn);
+                DataTable clientTable = new DataTable();
+                clientAdapter.Fill(clientTable);
+                cmbClient.DataSource = clientTable;
+                cmbClient.DisplayMember = "name";
+                cmbClient.ValueMember = "client_id";
+
+                // Загружаем сотрудников
+                string employeeSql = "select employee_id, last_name || ' ' || first_name as name from employees";
+                NpgsqlDataAdapter employeeAdapter = new NpgsqlDataAdapter(employeeSql, conn);
+                DataTable employeeTable = new DataTable();
+                employeeAdapter.Fill(employeeTable);
+                cmbEmployee.DataSource = employeeTable;
+                cmbEmployee.DisplayMember = "name";
+                cmbEmployee.ValueMember = "employee_id";
+
+                // Загружаем услуги
+                string serviceSql = "select service_id, service_name from services";
+                NpgsqlDataAdapter serviceAdapter = new NpgsqlDataAdapter(serviceSql, conn);
+                DataTable serviceTable = new DataTable();
+                serviceAdapter.Fill(serviceTable);
+                cmbService.DataSource = serviceTable;
+                cmbService.DisplayMember = "service_name";
+                cmbService.ValueMember = "service_id";
+            }
+        }
+
+        private void LoadOrderData()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql = "select client_id, employee_id, service_id from orders where order_id = @orderId";
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@orderId", _orderId.Value);
+                using (NpgsqlDataReader reader = cmd.ExecuteReader())
+                {
+                    if (reader.Read())
+                    {
+                        cmbClient.SelectedValue = reader["client_id"];
+                        cmbEmployee.SelectedValue = reader["employee_id"];
+                        cmbService.SelectedValue = reader["service_id"];
+                    }
+                }
+            }
+        }
+
+        private void btnSave_Click(object sender, EventArgs e)
+        {
+            if (cmbClient.SelectedValue == null || cmbEmployee.SelectedValue == null || cmbService.SelectedValue == null)
+            {
+                MessageBox.Show("Выберите все поля");
+                return;
+            }
+
+            int clientId = (int)cmbClient.SelectedValue;
+            int employeeId = (int)cmbEmployee.SelectedValue;
+            int serviceId = (int)cmbService.SelectedValue;
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql;
+                if (_orderId.HasValue)
+                {
+                    sql = "update orders set client_id = @clientId, employee_id = @employeeId, service_id = @serviceId where order_id = @orderId";
+                }
+                else
+                {
+                    sql = "insert into orders (client_id, employee_id, service_id, order_date) values (@clientId, @employeeId, @serviceId, @orderDate)";
+                }
+
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@clientId", clientId);
+                cmd.Parameters.AddWithValue("@employeeId", employeeId);
+                cmd.Parameters.AddWithValue("@serviceId", serviceId);
+
+                if (_orderId.HasValue)
+                {
+                    cmd.Parameters.AddWithValue("@orderId", _orderId.Value);
+                }
+                else
+                {
+                    cmd.Parameters.AddWithValue("@orderDate", DateTime.Now);
+                }
+
+                cmd.ExecuteNonQuery();
+                MessageBox.Show("Заказ сохранён");
+                this.Close();
+            }
+        }
+
+        private void btnCancel_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

PhotoStudioApp.csproj

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{4C519073-EAA7-4936-9361-72FFE3D3CDDF}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>PhotoStudioApp</RootNamespace>
+    <AssemblyName>PhotoStudioApp</AssemblyName>
+    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Bcl.AsyncInterfaces.7.0.0\lib\net462\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Bcl.HashCode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Bcl.HashCode.1.1.1\lib\net461\Microsoft.Bcl.HashCode.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Extensions.Logging.Abstractions, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\lib\net461\Microsoft.Extensions.Logging.Abstractions.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.VisualBasic" />
+    <Reference Include="Npgsql, Version=7.0.10.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7, processorArchitecture=MSIL">
+      <HintPath>packages\Npgsql.7.0.10\lib\netstandard2.0\Npgsql.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Buffers.4.5.1\lib\net461\System.Buffers.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Collections.Immutable, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Collections.Immutable.7.0.0\lib\net462\System.Collections.Immutable.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Core" />
+    <Reference Include="System.Diagnostics.DiagnosticSource, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Diagnostics.DiagnosticSource.6.0.0\lib\net461\System.Diagnostics.DiagnosticSource.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Memory.4.5.5\lib\net461\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Runtime.CompilerServices.Unsafe.6.0.0\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Text.Encodings.Web, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Text.Encodings.Web.7.0.0\lib\net462\System.Text.Encodings.Web.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Text.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Text.Json.7.0.0\lib\net462\System.Text.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Channels, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Threading.Channels.7.0.0\lib\net462\System.Threading.Channels.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Tasks.Extensions, Version=4.2.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Threading.Tasks.Extensions.4.5.4\lib\net461\System.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="System.ValueTuple, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="ClientForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="ClientForm.Designer.cs">
+      <DependentUpon>ClientForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="LoginForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="LoginForm.Designer.cs">
+      <DependentUpon>LoginForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="MainForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="MainForm.Designer.cs">
+      <DependentUpon>MainForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="OrderForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="OrderForm.Designer.cs">
+      <DependentUpon>OrderForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="ServiceForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="ServiceForm.Designer.cs">
+      <DependentUpon>ServiceForm.cs</DependentUpon>
+    </Compile>
+    <EmbeddedResource Include="ClientForm.resx">
+      <DependentUpon>ClientForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="MainForm.resx">
+      <DependentUpon>MainForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <EmbeddedResource Include="ServiceForm.resx">
+      <DependentUpon>ServiceForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <None Include="packages.config" />
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets" Condition="Exists('packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>Данный проект ссылается на пакеты NuGet, отсутствующие на этом компьютере. Используйте восстановление пакетов NuGet, чтобы скачать их.  Дополнительную информацию см. по адресу: http://go.microsoft.com/fwlink/?LinkID=322105. Отсутствует следующий файл: {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets'))" />
+  </Target>
+</Project>

PhotoStudioApp.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36401.2 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PhotoStudioApp", "PhotoStudioApp.csproj", "{4C519073-EAA7-4936-9361-72FFE3D3CDDF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {0102972C-D6B0-41FD-AB3F-908AF8268884}
+	EndGlobalSection
+EndGlobal

PhotoStudioApp/App.config

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Numerics.Vectors" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.1.4.0" newVersion="4.1.4.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks.Extensions" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.2.0.1" newVersion="4.2.0.1" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.ValueTuple" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.2" newVersion="4.0.1.2" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>

PhotoStudioApp/ClientForm.Designer.cs

@@ -0,0 +1,132 @@
+namespace PhotoStudioApp
+{
+    partial class ClientForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.dgvClients = new System.Windows.Forms.DataGridView();
+            this.btnAdd = new System.Windows.Forms.Button();
+            this.btnEdit = new System.Windows.Forms.Button();
+            this.btnDelete = new System.Windows.Forms.Button();
+            this.btnClose = new System.Windows.Forms.Button();
+            this.lblTitle = new System.Windows.Forms.Label();
+            ((System.ComponentModel.ISupportInitialize)(this.dgvClients)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // dgvClients
+            // 
+            this.dgvClients.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
+            this.dgvClients.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dgvClients.Location = new System.Drawing.Point(27, 74);
+            this.dgvClients.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.dgvClients.MultiSelect = false;
+            this.dgvClients.Name = "dgvClients";
+            this.dgvClients.ReadOnly = true;
+            this.dgvClients.RowHeadersWidth = 51;
+            this.dgvClients.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
+            this.dgvClients.Size = new System.Drawing.Size(922, 431);
+            this.dgvClients.TabIndex = 0;
+            // 
+            // btnAdd
+            // 
+            this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnAdd.Location = new System.Drawing.Point(27, 537);
+            this.btnAdd.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnAdd.Name = "btnAdd";
+            this.btnAdd.Size = new System.Drawing.Size(195, 40);
+            this.btnAdd.TabIndex = 1;
+            this.btnAdd.Text = "Добавить клиента";
+            this.btnAdd.UseVisualStyleBackColor = true;
+            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
+            // 
+            // btnEdit
+            // 
+            this.btnEdit.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnEdit.Location = new System.Drawing.Point(230, 537);
+            this.btnEdit.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnEdit.Name = "btnEdit";
+            this.btnEdit.Size = new System.Drawing.Size(175, 40);
+            this.btnEdit.TabIndex = 2;
+            this.btnEdit.Text = "Редактировать";
+            this.btnEdit.UseVisualStyleBackColor = true;
+            this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
+            // 
+            // btnDelete
+            // 
+            this.btnDelete.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnDelete.Location = new System.Drawing.Point(413, 537);
+            this.btnDelete.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnDelete.Name = "btnDelete";
+            this.btnDelete.Size = new System.Drawing.Size(160, 40);
+            this.btnDelete.TabIndex = 3;
+            this.btnDelete.Text = "Удалить";
+            this.btnDelete.UseVisualStyleBackColor = true;
+            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
+            // 
+            // btnClose
+            // 
+            this.btnClose.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnClose.Location = new System.Drawing.Point(581, 537);
+            this.btnClose.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnClose.Name = "btnClose";
+            this.btnClose.Size = new System.Drawing.Size(160, 40);
+            this.btnClose.TabIndex = 4;
+            this.btnClose.Text = "Закрыть";
+            this.btnClose.UseVisualStyleBackColor = true;
+            this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblTitle.Location = new System.Drawing.Point(27, 25);
+            this.lblTitle.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(313, 29);
+            this.lblTitle.TabIndex = 5;
+            this.lblTitle.Text = "Управление клиентами";
+            // 
+            // ClientForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(962, 623);
+            this.Controls.Add(this.lblTitle);
+            this.Controls.Add(this.btnClose);
+            this.Controls.Add(this.btnDelete);
+            this.Controls.Add(this.btnEdit);
+            this.Controls.Add(this.btnAdd);
+            this.Controls.Add(this.dgvClients);
+            this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.Name = "ClientForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Управление клиентами";
+            ((System.ComponentModel.ISupportInitialize)(this.dgvClients)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.DataGridView dgvClients;
+        private System.Windows.Forms.Button btnAdd;
+        private System.Windows.Forms.Button btnEdit;
+        private System.Windows.Forms.Button btnDelete;
+        private System.Windows.Forms.Button btnClose;
+        private System.Windows.Forms.Label lblTitle;
+    }
+}

PhotoStudioApp/ClientForm.cs

@@ -0,0 +1,162 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class ClientForm : Form
+    {
+        private string _connectionString;
+
+        public ClientForm(string connectionString)
+        {
+            InitializeComponent();
+            _connectionString = connectionString;
+            LoadClients();
+        }
+
+        private void LoadClients()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql = "select client_id, last_name, first_name, middle_name, phone from clients";
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(sql, conn);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                dgvClients.DataSource = dt;
+                if (dgvClients.Columns.Contains("client_id"))
+                {
+                    dgvClients.Columns["client_id"].Visible = false;
+                }
+            }
+        }
+
+        private string GetSHA256Hash(string input)
+        {
+            using (System.Security.Cryptography.SHA256 sha256 = System.Security.Cryptography.SHA256.Create())
+            {
+                byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
+                byte[] hashBytes = sha256.ComputeHash(inputBytes);
+                return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
+            }
+        }
+
+        private void btnAdd_Click(object sender, EventArgs e)
+        {
+            string lastName = Microsoft.VisualBasic.Interaction.InputBox("Введите фамилию", "Добавление клиента");
+            if (!string.IsNullOrEmpty(lastName))
+            {
+                string firstName = Microsoft.VisualBasic.Interaction.InputBox("Введите имя", "Добавление клиента");
+                string middleName = Microsoft.VisualBasic.Interaction.InputBox("Введите отчество (необязательно)", "Добавление клиента");
+                string phone = Microsoft.VisualBasic.Interaction.InputBox("Введите телефон", "Добавление клиента");
+
+                using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                {
+                    conn.Open();
+
+                    // 1. Создаём пользователя
+                    string login = lastName.ToLower() + "_" + firstName.ToLower();
+                    string passwordHash = GetSHA256Hash("123"); // пароль по умолчанию
+
+                    string userSql = "insert into users (login, password_hash, role_id) values (@login, @hash, 2) returning user_id";
+                    NpgsqlCommand userCmd = new NpgsqlCommand(userSql, conn);
+                    userCmd.Parameters.AddWithValue("@login", login);
+                    userCmd.Parameters.AddWithValue("@hash", passwordHash);
+
+                    int userId = Convert.ToInt32(userCmd.ExecuteScalar());
+
+                    // 2. Создаём клиента с полученным user_id
+                    string clientSql = "insert into clients (user_id, last_name, first_name, middle_name, phone) values (@userId, @lastName, @firstName, @middleName, @phone)";
+                    NpgsqlCommand clientCmd = new NpgsqlCommand(clientSql, conn);
+                    clientCmd.Parameters.AddWithValue("@userId", userId);
+                    clientCmd.Parameters.AddWithValue("@lastName", lastName);
+                    clientCmd.Parameters.AddWithValue("@firstName", firstName);
+                    clientCmd.Parameters.AddWithValue("@middleName", middleName);
+                    clientCmd.Parameters.AddWithValue("@phone", phone);
+                    clientCmd.ExecuteNonQuery();
+
+                    MessageBox.Show($"Клиент добавлен! Логин: {login}, пароль: 123");
+                    LoadClients();
+                }
+            }
+        }
+
+        private void btnEdit_Click(object sender, EventArgs e)
+        {
+            if (dgvClients.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvClients.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int clientId = (int)rowView["client_id"];
+                    string currentLastName = rowView["last_name"].ToString();
+                    string currentFirstName = rowView["first_name"].ToString();
+                    string currentMiddleName = rowView["middle_name"].ToString();
+                    string currentPhone = rowView["phone"].ToString();
+
+                    string lastName = Microsoft.VisualBasic.Interaction.InputBox("Фамилия", "Редактирование", currentLastName);
+                    string firstName = Microsoft.VisualBasic.Interaction.InputBox("Имя", "Редактирование", currentFirstName);
+                    string middleName = Microsoft.VisualBasic.Interaction.InputBox("Отчество", "Редактирование", currentMiddleName);
+                    string phone = Microsoft.VisualBasic.Interaction.InputBox("Телефон", "Редактирование", currentPhone);
+
+                    using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                    {
+                        conn.Open();
+                        string sql = "update clients set last_name = @lastName, first_name = @firstName, middle_name = @middleName, phone = @phone where client_id = @clientId";
+                        NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                        cmd.Parameters.AddWithValue("@lastName", lastName);
+                        cmd.Parameters.AddWithValue("@firstName", firstName);
+                        cmd.Parameters.AddWithValue("@middleName", middleName);
+                        cmd.Parameters.AddWithValue("@phone", phone);
+                        cmd.Parameters.AddWithValue("@clientId", clientId);
+                        cmd.ExecuteNonQuery();
+                        MessageBox.Show("Клиент обновлён");
+                        LoadClients();
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите клиента для редактирования");
+            }
+        }
+
+        private void btnDelete_Click(object sender, EventArgs e)
+        {
+            if (dgvClients.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvClients.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int clientId = (int)rowView["client_id"];
+                    if (MessageBox.Show("Удалить клиента?", "Подтверждение", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            // Сначала удаляем клиента
+                            string sql = "delete from clients where client_id = @clientId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@clientId", clientId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Клиент удалён");
+                            LoadClients();
+                        }
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите клиента для удаления");
+            }
+        }
+
+        private void btnClose_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

PhotoStudioApp/ClientForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

PhotoStudioApp/LoginForm.Designer.cs

@@ -0,0 +1,94 @@
+namespace PhotoStudioApp
+{
+    partial class LoginForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.lblLogin = new System.Windows.Forms.Label();
+            this.lblPassword = new System.Windows.Forms.Label();
+            this.txtLogin = new System.Windows.Forms.TextBox();
+            this.txtPassword = new System.Windows.Forms.TextBox();
+            this.btnLogin = new System.Windows.Forms.Button();
+            this.SuspendLayout();
+
+            // lblLogin
+            this.lblLogin.AutoSize = true;
+            this.lblLogin.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblLogin.Location = new System.Drawing.Point(50, 60);
+            this.lblLogin.Name = "lblLogin";
+            this.lblLogin.Size = new System.Drawing.Size(55, 20);
+            this.lblLogin.TabIndex = 0;
+            this.lblLogin.Text = "Логин:";
+
+            // lblPassword
+            this.lblPassword.AutoSize = true;
+            this.lblPassword.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblPassword.Location = new System.Drawing.Point(50, 110);
+            this.lblPassword.Name = "lblPassword";
+            this.lblPassword.Size = new System.Drawing.Size(67, 20);
+            this.lblPassword.TabIndex = 1;
+            this.lblPassword.Text = "Пароль:";
+
+            // txtLogin
+            this.txtLogin.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.txtLogin.Location = new System.Drawing.Point(150, 57);
+            this.txtLogin.Name = "txtLogin";
+            this.txtLogin.Size = new System.Drawing.Size(200, 26);
+            this.txtLogin.TabIndex = 2;
+
+            // txtPassword
+            this.txtPassword.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.txtPassword.Location = new System.Drawing.Point(150, 107);
+            this.txtPassword.Name = "txtPassword";
+            this.txtPassword.PasswordChar = '*';
+            this.txtPassword.Size = new System.Drawing.Size(200, 26);
+            this.txtPassword.TabIndex = 3;
+
+            // btnLogin
+            this.btnLogin.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnLogin.Location = new System.Drawing.Point(150, 160);
+            this.btnLogin.Name = "btnLogin";
+            this.btnLogin.Size = new System.Drawing.Size(150, 35);
+            this.btnLogin.TabIndex = 4;
+            this.btnLogin.Text = "Войти";
+            this.btnLogin.UseVisualStyleBackColor = true;
+            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
+
+            // LoginForm
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(400, 250);
+            this.Controls.Add(this.btnLogin);
+            this.Controls.Add(this.txtPassword);
+            this.Controls.Add(this.txtLogin);
+            this.Controls.Add(this.lblPassword);
+            this.Controls.Add(this.lblLogin);
+            this.Name = "LoginForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Вход в систему";
+            this.ResumeLayout(false);
+            this.PerformLayout();
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label lblLogin;
+        private System.Windows.Forms.Label lblPassword;
+        private System.Windows.Forms.TextBox txtLogin;
+        private System.Windows.Forms.TextBox txtPassword;
+        private System.Windows.Forms.Button btnLogin;
+    }
+}

PhotoStudioApp/LoginForm.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class LoginForm : Form
+    {
+        private string connectionString = "Host=245e1-rw.db.pub.dbaas.postgrespro.ru;Port=5432;Database=dbproject;Username=smirnova_ul;Password=Q#Rto%g$$$5;SSL Mode=Require;Trust Server Certificate=true;";
+
+        public LoginForm()
+        {
+            InitializeComponent();
+        }
+
+        private void btnLogin_Click(object sender, EventArgs e)
+        {
+            string login = txtLogin.Text;
+            string password = txtPassword.Text;
+            string hash = GetSHA256Hash(password);
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
+            {
+                conn.Open();
+                string sql = "select u.user_id, r.role_name from users u join roles r on u.role_id = r.role_id where u.login = @login and u.password_hash = @hash";
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@login", login);
+                cmd.Parameters.AddWithValue("@hash", hash);
+
+                using (NpgsqlDataReader reader = cmd.ExecuteReader())
+                {
+                    if (reader.Read())
+                    {
+                        int userId = reader.GetInt32(0);
+                        string role = reader.GetString(1);
+                        MessageBox.Show($"Добро пожаловать, {login}! Роль: {role}");
+
+                        MainForm mainForm = new MainForm(userId, role, login, connectionString);
+                        mainForm.Show();
+                        this.Hide();
+                    }
+                    else
+                    {
+                        MessageBox.Show("Неверный логин или пароль");
+                    }
+                }
+            }
+        }
+
+        private string GetSHA256Hash(string input)
+        {
+            using (System.Security.Cryptography.SHA256 sha256 = System.Security.Cryptography.SHA256.Create())
+            {
+                byte[] inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
+                byte[] hashBytes = sha256.ComputeHash(inputBytes);
+                return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
+            }
+        }
+
+        protected override void OnFormClosing(FormClosingEventArgs e)
+        {
+            if (this.Owner == null)
+            {
+                Application.Exit();
+            }
+            base.OnFormClosing(e);
+        }
+    }
+}

PhotoStudioApp/MainForm.Designer.cs

@@ -0,0 +1,190 @@
+namespace PhotoStudioApp
+{
+    partial class MainForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.dgvOrders = new System.Windows.Forms.DataGridView();
+            this.btnAdd = new System.Windows.Forms.Button();
+            this.btnEdit = new System.Windows.Forms.Button();
+            this.btnDelete = new System.Windows.Forms.Button();
+            this.btnSearch = new System.Windows.Forms.Button();
+            this.btnReport = new System.Windows.Forms.Button();
+            this.btnLogout = new System.Windows.Forms.Button();
+            this.btnServices = new System.Windows.Forms.Button();
+            this.btnClients = new System.Windows.Forms.Button();
+            this.lblTitle = new System.Windows.Forms.Label();
+            ((System.ComponentModel.ISupportInitialize)(this.dgvOrders)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // dgvOrders
+            // 
+            this.dgvOrders.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
+            this.dgvOrders.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dgvOrders.Location = new System.Drawing.Point(27, 74);
+            this.dgvOrders.Margin = new System.Windows.Forms.Padding(4);
+            this.dgvOrders.MultiSelect = false;
+            this.dgvOrders.Name = "dgvOrders";
+            this.dgvOrders.ReadOnly = true;
+            this.dgvOrders.RowHeadersWidth = 51;
+            this.dgvOrders.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
+            this.dgvOrders.Size = new System.Drawing.Size(912, 431);
+            this.dgvOrders.TabIndex = 0;
+            // 
+            // btnAdd
+            // 
+            this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnAdd.Location = new System.Drawing.Point(27, 517);
+            this.btnAdd.Margin = new System.Windows.Forms.Padding(4);
+            this.btnAdd.Name = "btnAdd";
+            this.btnAdd.Size = new System.Drawing.Size(180, 40);
+            this.btnAdd.TabIndex = 1;
+            this.btnAdd.Text = "Добавить заказ";
+            this.btnAdd.UseVisualStyleBackColor = true;
+            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
+            // 
+            // btnEdit
+            // 
+            this.btnEdit.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnEdit.Location = new System.Drawing.Point(215, 517);
+            this.btnEdit.Margin = new System.Windows.Forms.Padding(4);
+            this.btnEdit.Name = "btnEdit";
+            this.btnEdit.Size = new System.Drawing.Size(180, 40);
+            this.btnEdit.TabIndex = 2;
+            this.btnEdit.Text = "Редактировать";
+            this.btnEdit.UseVisualStyleBackColor = true;
+            this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
+            // 
+            // btnDelete
+            // 
+            this.btnDelete.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnDelete.Location = new System.Drawing.Point(403, 517);
+            this.btnDelete.Margin = new System.Windows.Forms.Padding(4);
+            this.btnDelete.Name = "btnDelete";
+            this.btnDelete.Size = new System.Drawing.Size(160, 40);
+            this.btnDelete.TabIndex = 3;
+            this.btnDelete.Text = "Удалить";
+            this.btnDelete.UseVisualStyleBackColor = true;
+            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
+            // 
+            // btnSearch
+            // 
+            this.btnSearch.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnSearch.Location = new System.Drawing.Point(571, 517);
+            this.btnSearch.Margin = new System.Windows.Forms.Padding(4);
+            this.btnSearch.Name = "btnSearch";
+            this.btnSearch.Size = new System.Drawing.Size(180, 40);
+            this.btnSearch.TabIndex = 4;
+            this.btnSearch.Text = "Поиск по услуге";
+            this.btnSearch.UseVisualStyleBackColor = true;
+            this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
+            // 
+            // btnReport
+            // 
+            this.btnReport.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnReport.Location = new System.Drawing.Point(759, 517);
+            this.btnReport.Margin = new System.Windows.Forms.Padding(4);
+            this.btnReport.Name = "btnReport";
+            this.btnReport.Size = new System.Drawing.Size(180, 40);
+            this.btnReport.TabIndex = 5;
+            this.btnReport.Text = "Отчёт по датам";
+            this.btnReport.UseVisualStyleBackColor = true;
+            this.btnReport.Click += new System.EventHandler(this.btnReport_Click);
+            // 
+            // btnLogout
+            // 
+            this.btnLogout.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnLogout.Location = new System.Drawing.Point(829, 565);
+            this.btnLogout.Margin = new System.Windows.Forms.Padding(4);
+            this.btnLogout.Name = "btnLogout";
+            this.btnLogout.Size = new System.Drawing.Size(110, 40);
+            this.btnLogout.TabIndex = 6;
+            this.btnLogout.Text = "Выход";
+            this.btnLogout.UseVisualStyleBackColor = true;
+            this.btnLogout.Click += new System.EventHandler(this.btnLogout_Click);
+            // 
+            // btnServices
+            // 
+            this.btnServices.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnServices.Location = new System.Drawing.Point(143, 564);
+            this.btnServices.Name = "btnServices";
+            this.btnServices.Size = new System.Drawing.Size(110, 40);
+            this.btnServices.TabIndex = 8;
+            this.btnServices.Text = "Услуги";
+            this.btnServices.UseVisualStyleBackColor = true;
+            this.btnServices.Click += new System.EventHandler(this.btnServices_Click);
+            // 
+            // btnClients
+            // 
+            this.btnClients.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnClients.Location = new System.Drawing.Point(27, 564);
+            this.btnClients.Name = "btnClients";
+            this.btnClients.Size = new System.Drawing.Size(110, 40);
+            this.btnClients.TabIndex = 9;
+            this.btnClients.Text = "Клиенты";
+            this.btnClients.UseVisualStyleBackColor = true;
+            this.btnClients.Click += new System.EventHandler(this.btnClients_Click);
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblTitle.Location = new System.Drawing.Point(27, 25);
+            this.lblTitle.Margin = new System.Windows.Forms.Padding(4);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(293, 29);
+            this.lblTitle.TabIndex = 7;
+            this.lblTitle.Text = "Управление заказами";
+            // 
+            // MainForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(962, 623);
+            this.Controls.Add(this.btnClients);
+            this.Controls.Add(this.btnServices);
+            this.Controls.Add(this.lblTitle);
+            this.Controls.Add(this.btnLogout);
+            this.Controls.Add(this.btnReport);
+            this.Controls.Add(this.btnSearch);
+            this.Controls.Add(this.btnDelete);
+            this.Controls.Add(this.btnEdit);
+            this.Controls.Add(this.btnAdd);
+            this.Controls.Add(this.dgvOrders);
+            this.Margin = new System.Windows.Forms.Padding(4);
+            this.Name = "MainForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Фотостудия - Главная";
+            ((System.ComponentModel.ISupportInitialize)(this.dgvOrders)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.DataGridView dgvOrders;
+        private System.Windows.Forms.Button btnAdd;
+        private System.Windows.Forms.Button btnEdit;
+        private System.Windows.Forms.Button btnDelete;
+        private System.Windows.Forms.Button btnSearch;
+        private System.Windows.Forms.Button btnReport;
+        private System.Windows.Forms.Button btnLogout;
+        private System.Windows.Forms.Button btnServices;
+        private System.Windows.Forms.Button btnClients;
+        private System.Windows.Forms.Label lblTitle;
+    }
+}

PhotoStudioApp/MainForm.cs

@@ -0,0 +1,294 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class MainForm : Form
+    {
+        private int _userId;
+        private string _role;
+        private string _login;
+        private string _connectionString;
+
+        public MainForm(int userId, string role, string login, string connectionString)
+        {
+            InitializeComponent();
+            _userId = userId;
+            _role = role;
+            _login = login;
+            _connectionString = connectionString;
+
+            // Настройка доступных кнопок в зависимости от роли
+            if (_role == "client")
+            {
+                btnAdd.Enabled = false;
+                btnDelete.Enabled = false;
+                btnEdit.Enabled = false;
+                btnServices.Enabled = false;
+                btnClients.Enabled = false;
+            }
+
+            LoadOrders();
+        }
+
+        private void LoadOrders()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql;
+                if (_role == "admin")
+                {
+                    sql = "select * from v_orders_with_total order by order_date desc";
+                }
+                else
+                {
+                    sql = @"
+                        select 
+                            o.order_id,
+                            s.service_name,
+                            o.order_date,
+                            s.price as total_amount
+                        from orders o
+                        join services s on o.service_id = s.service_id
+                        join clients c on o.client_id = c.client_id
+                        join users u on c.user_id = u.user_id
+                        where u.login = @login";
+                }
+
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                if (_role != "admin")
+                {
+                    cmd.Parameters.AddWithValue("@login", _login);
+                }
+
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(cmd);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                // Скрываем столбцы с ID из отображения
+                if (dt.Columns.Contains("client_id")) dt.Columns.Remove("client_id");
+                if (dt.Columns.Contains("employee_id")) dt.Columns.Remove("employee_id");
+                if (dt.Columns.Contains("service_id")) dt.Columns.Remove("service_id");
+
+                dgvOrders.DataSource = dt;
+                if (dgvOrders.Columns.Contains("order_id"))
+                {
+                    dgvOrders.Columns["order_id"].Visible = false;
+                }
+            }
+        }
+
+        private void btnAdd_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может добавлять заказы.");
+                return;
+            }
+
+            OrderForm orderForm = new OrderForm(_connectionString);
+            orderForm.ShowDialog();
+            LoadOrders();
+        }
+
+        private void btnEdit_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может редактировать заказы.");
+                return;
+            }
+
+            if (dgvOrders.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvOrders.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int orderId = (int)rowView["order_id"];
+                    OrderForm orderForm = new OrderForm(_connectionString, orderId);
+                    orderForm.ShowDialog();
+                    LoadOrders();
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите заказ для редактирования");
+            }
+        }
+
+        private void btnDelete_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может удалять заказы.");
+                return;
+            }
+
+            if (dgvOrders.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvOrders.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int orderId = (int)rowView["order_id"];
+                    if (MessageBox.Show("Удалить заказ?", "Подтверждение", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            string sql = "delete from orders where order_id = @orderId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@orderId", orderId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Заказ удалён");
+                            LoadOrders();
+                        }
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите заказ для удаления");
+            }
+        }
+
+        private void btnSearch_Click(object sender, EventArgs e)
+        {
+            string serviceName = Microsoft.VisualBasic.Interaction.InputBox("Введите название услуги", "Поиск", "wedding");
+            if (!string.IsNullOrEmpty(serviceName))
+            {
+                using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                {
+                    conn.Open();
+                    string sql;
+                    if (_role == "admin")
+                    {
+                        sql = "select * from get_orders_by_service_today(@serviceName)";
+                    }
+                    else
+                    {
+                        sql = @"
+                            select 
+                                o.order_id,
+                                s.service_name,
+                                o.order_date,
+                                s.price as total_amount
+                            from orders o
+                            join services s on o.service_id = s.service_id
+                            join clients c on o.client_id = c.client_id
+                            join users u on c.user_id = u.user_id
+                            where s.service_name = @serviceName
+                              and u.login = @login";
+                    }
+
+                    NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                    cmd.Parameters.AddWithValue("@serviceName", serviceName);
+                    if (_role != "admin")
+                    {
+                        cmd.Parameters.AddWithValue("@login", _login);
+                    }
+
+                    NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(cmd);
+                    DataTable dt = new DataTable();
+                    adapter.Fill(dt);
+
+                    // Скрываем столбцы с ID
+                    if (dt.Columns.Contains("client_id")) dt.Columns.Remove("client_id");
+                    if (dt.Columns.Contains("employee_id")) dt.Columns.Remove("employee_id");
+                    if (dt.Columns.Contains("service_id")) dt.Columns.Remove("service_id");
+
+                    dgvOrders.DataSource = dt;
+                    if (dgvOrders.Columns.Contains("order_id"))
+                    {
+                        dgvOrders.Columns["order_id"].Visible = false;
+                    }
+                }
+            }
+        }
+
+        private void btnReport_Click(object sender, EventArgs e)
+        {
+            DateTime start = DateTime.Now.AddDays(-30);
+            DateTime end = DateTime.Now;
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql;
+                if (_role == "admin")
+                {
+                    sql = "select * from v_orders_with_total where order_date between @start and @end";
+                }
+                else
+                {
+                    sql = @"
+                        select 
+                            o.order_id,
+                            s.service_name,
+                            o.order_date,
+                            s.price as total_amount
+                        from orders o
+                        join services s on o.service_id = s.service_id
+                        join clients c on o.client_id = c.client_id
+                        join users u on c.user_id = u.user_id
+                        where o.order_date between @start and @end
+                          and u.login = @login";
+                }
+
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@start", start);
+                cmd.Parameters.AddWithValue("@end", end);
+                if (_role != "admin")
+                {
+                    cmd.Parameters.AddWithValue("@login", _login);
+                }
+
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(cmd);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                // Скрываем столбцы с ID
+                if (dt.Columns.Contains("client_id")) dt.Columns.Remove("client_id");
+                if (dt.Columns.Contains("employee_id")) dt.Columns.Remove("employee_id");
+                if (dt.Columns.Contains("service_id")) dt.Columns.Remove("service_id");
+
+                dgvOrders.DataSource = dt;
+                if (dgvOrders.Columns.Contains("order_id"))
+                {
+                    dgvOrders.Columns["order_id"].Visible = false;
+                }
+            }
+        }
+
+        private void btnServices_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может управлять услугами.");
+                return;
+            }
+            ServiceForm serviceForm = new ServiceForm(_connectionString);
+            serviceForm.ShowDialog();
+        }
+
+        private void btnClients_Click(object sender, EventArgs e)
+        {
+            if (_role == "client")
+            {
+                MessageBox.Show("Клиент не может управлять клиентами.");
+                return;
+            }
+            ClientForm clientForm = new ClientForm(_connectionString);
+            clientForm.ShowDialog();
+        }
+
+        private void btnLogout_Click(object sender, EventArgs e)
+        {
+            this.Close();
+            LoginForm loginForm = new LoginForm();
+            loginForm.Show();
+        }
+    }
+}

PhotoStudioApp/MainForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

PhotoStudioApp/OrderForm.Designer.cs

@@ -0,0 +1,131 @@
+namespace PhotoStudioApp
+{
+    partial class OrderForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.lblClient = new System.Windows.Forms.Label();
+            this.lblEmployee = new System.Windows.Forms.Label();
+            this.lblService = new System.Windows.Forms.Label();
+            this.cmbClient = new System.Windows.Forms.ComboBox();
+            this.cmbEmployee = new System.Windows.Forms.ComboBox();
+            this.cmbService = new System.Windows.Forms.ComboBox();
+            this.btnSave = new System.Windows.Forms.Button();
+            this.btnCancel = new System.Windows.Forms.Button();
+            this.SuspendLayout();
+
+            // lblClient
+            this.lblClient.AutoSize = true;
+            this.lblClient.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblClient.Location = new System.Drawing.Point(30, 30);
+            this.lblClient.Name = "lblClient";
+            this.lblClient.Size = new System.Drawing.Size(97, 18);
+            this.lblClient.TabIndex = 0;
+            this.lblClient.Text = "Клиент:";
+
+            // lblEmployee
+            this.lblEmployee.AutoSize = true;
+            this.lblEmployee.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblEmployee.Location = new System.Drawing.Point(30, 70);
+            this.lblEmployee.Name = "lblEmployee";
+            this.lblEmployee.Size = new System.Drawing.Size(112, 18);
+            this.lblEmployee.TabIndex = 1;
+            this.lblEmployee.Text = "Сотрудник:";
+
+            // lblService
+            this.lblService.AutoSize = true;
+            this.lblService.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblService.Location = new System.Drawing.Point(30, 110);
+            this.lblService.Name = "lblService";
+            this.lblService.Size = new System.Drawing.Size(89, 18);
+            this.lblService.TabIndex = 2;
+            this.lblService.Text = "Услуга:";
+
+            // cmbClient
+            this.cmbClient.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.cmbClient.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.cmbClient.Location = new System.Drawing.Point(160, 27);
+            this.cmbClient.Name = "cmbClient";
+            this.cmbClient.Size = new System.Drawing.Size(200, 26);
+            this.cmbClient.TabIndex = 3;
+
+            // cmbEmployee
+            this.cmbEmployee.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.cmbEmployee.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.cmbEmployee.Location = new System.Drawing.Point(160, 67);
+            this.cmbEmployee.Name = "cmbEmployee";
+            this.cmbEmployee.Size = new System.Drawing.Size(200, 26);
+            this.cmbEmployee.TabIndex = 4;
+
+            // cmbService
+            this.cmbService.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.cmbService.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.cmbService.Location = new System.Drawing.Point(160, 107);
+            this.cmbService.Name = "cmbService";
+            this.cmbService.Size = new System.Drawing.Size(200, 26);
+            this.cmbService.TabIndex = 5;
+
+            // btnSave
+            this.btnSave.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnSave.Location = new System.Drawing.Point(50, 160);
+            this.btnSave.Name = "btnSave";
+            this.btnSave.Size = new System.Drawing.Size(100, 35);
+            this.btnSave.TabIndex = 6;
+            this.btnSave.Text = "Сохранить";
+            this.btnSave.UseVisualStyleBackColor = true;
+            this.btnSave.Click += new System.EventHandler(this.btnSave_Click);
+
+            // btnCancel
+            this.btnCancel.Font = new System.Drawing.Font("Microsoft Sans Serif", 11F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnCancel.Location = new System.Drawing.Point(170, 160);
+            this.btnCancel.Name = "btnCancel";
+            this.btnCancel.Size = new System.Drawing.Size(100, 35);
+            this.btnCancel.TabIndex = 7;
+            this.btnCancel.Text = "Отмена";
+            this.btnCancel.UseVisualStyleBackColor = true;
+            this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
+
+            // OrderForm
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(400, 220);
+            this.Controls.Add(this.btnCancel);
+            this.Controls.Add(this.btnSave);
+            this.Controls.Add(this.cmbService);
+            this.Controls.Add(this.cmbEmployee);
+            this.Controls.Add(this.cmbClient);
+            this.Controls.Add(this.lblService);
+            this.Controls.Add(this.lblEmployee);
+            this.Controls.Add(this.lblClient);
+            this.Name = "OrderForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Заказ";
+            this.ResumeLayout(false);
+            this.PerformLayout();
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label lblClient;
+        private System.Windows.Forms.Label lblEmployee;
+        private System.Windows.Forms.Label lblService;
+        private System.Windows.Forms.ComboBox cmbClient;
+        private System.Windows.Forms.ComboBox cmbEmployee;
+        private System.Windows.Forms.ComboBox cmbService;
+        private System.Windows.Forms.Button btnSave;
+        private System.Windows.Forms.Button btnCancel;
+    }
+}

PhotoStudioApp/OrderForm.cs

@@ -0,0 +1,132 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class OrderForm : Form
+    {
+        private string _connectionString;
+        private int? _orderId;
+
+        public OrderForm(string connectionString, int? orderId = null)
+        {
+            InitializeComponent();
+            _connectionString = connectionString;
+            _orderId = orderId;
+
+            LoadComboBoxes();
+
+            if (_orderId.HasValue)
+            {
+                LoadOrderData();
+            }
+        }
+
+        private void LoadComboBoxes()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+
+                // Загружаем клиентов
+                string clientSql = "select client_id, last_name || ' ' || first_name as name from clients";
+                NpgsqlDataAdapter clientAdapter = new NpgsqlDataAdapter(clientSql, conn);
+                DataTable clientTable = new DataTable();
+                clientAdapter.Fill(clientTable);
+                cmbClient.DataSource = clientTable;
+                cmbClient.DisplayMember = "name";
+                cmbClient.ValueMember = "client_id";
+
+                // Загружаем сотрудников
+                string employeeSql = "select employee_id, last_name || ' ' || first_name as name from employees";
+                NpgsqlDataAdapter employeeAdapter = new NpgsqlDataAdapter(employeeSql, conn);
+                DataTable employeeTable = new DataTable();
+                employeeAdapter.Fill(employeeTable);
+                cmbEmployee.DataSource = employeeTable;
+                cmbEmployee.DisplayMember = "name";
+                cmbEmployee.ValueMember = "employee_id";
+
+                // Загружаем услуги
+                string serviceSql = "select service_id, service_name from services";
+                NpgsqlDataAdapter serviceAdapter = new NpgsqlDataAdapter(serviceSql, conn);
+                DataTable serviceTable = new DataTable();
+                serviceAdapter.Fill(serviceTable);
+                cmbService.DataSource = serviceTable;
+                cmbService.DisplayMember = "service_name";
+                cmbService.ValueMember = "service_id";
+            }
+        }
+
+        private void LoadOrderData()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql = "select client_id, employee_id, service_id from orders where order_id = @orderId";
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@orderId", _orderId.Value);
+                using (NpgsqlDataReader reader = cmd.ExecuteReader())
+                {
+                    if (reader.Read())
+                    {
+                        cmbClient.SelectedValue = reader["client_id"];
+                        cmbEmployee.SelectedValue = reader["employee_id"];
+                        cmbService.SelectedValue = reader["service_id"];
+                    }
+                }
+            }
+        }
+
+        private void btnSave_Click(object sender, EventArgs e)
+        {
+            if (cmbClient.SelectedValue == null || cmbEmployee.SelectedValue == null || cmbService.SelectedValue == null)
+            {
+                MessageBox.Show("Выберите все поля");
+                return;
+            }
+
+            int clientId = (int)cmbClient.SelectedValue;
+            int employeeId = (int)cmbEmployee.SelectedValue;
+            int serviceId = (int)cmbService.SelectedValue;
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql;
+                if (_orderId.HasValue)
+                {
+                    sql = "update orders set client_id = @clientId, employee_id = @employeeId, service_id = @serviceId where order_id = @orderId";
+                }
+                else
+                {
+                    sql = "insert into orders (client_id, employee_id, service_id, order_date) values (@clientId, @employeeId, @serviceId, @orderDate)";
+                }
+
+                NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                cmd.Parameters.AddWithValue("@clientId", clientId);
+                cmd.Parameters.AddWithValue("@employeeId", employeeId);
+                cmd.Parameters.AddWithValue("@serviceId", serviceId);
+
+                if (_orderId.HasValue)
+                {
+                    cmd.Parameters.AddWithValue("@orderId", _orderId.Value);
+                }
+                else
+                {
+                    cmd.Parameters.AddWithValue("@orderDate", DateTime.Now);
+                }
+
+                cmd.ExecuteNonQuery();
+                MessageBox.Show("Заказ сохранён");
+                this.Close();
+            }
+        }
+
+        private void btnCancel_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

PhotoStudioApp/PhotoStudioApp.csproj

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{4C519073-EAA7-4936-9361-72FFE3D3CDDF}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>PhotoStudioApp</RootNamespace>
+    <AssemblyName>PhotoStudioApp</AssemblyName>
+    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Bcl.AsyncInterfaces.7.0.0\lib\net462\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Bcl.HashCode, Version=1.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Bcl.HashCode.1.1.1\lib\net461\Microsoft.Bcl.HashCode.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Extensions.Logging.Abstractions, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\lib\net461\Microsoft.Extensions.Logging.Abstractions.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.VisualBasic" />
+    <Reference Include="Npgsql, Version=7.0.10.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7, processorArchitecture=MSIL">
+      <HintPath>packages\Npgsql.7.0.10\lib\netstandard2.0\Npgsql.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Buffers.4.5.1\lib\net461\System.Buffers.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Collections.Immutable, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Collections.Immutable.7.0.0\lib\net462\System.Collections.Immutable.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Core" />
+    <Reference Include="System.Diagnostics.DiagnosticSource, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Diagnostics.DiagnosticSource.6.0.0\lib\net461\System.Diagnostics.DiagnosticSource.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Memory.4.5.5\lib\net461\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Runtime.CompilerServices.Unsafe.6.0.0\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Text.Encodings.Web, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Text.Encodings.Web.7.0.0\lib\net462\System.Text.Encodings.Web.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Text.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Text.Json.7.0.0\lib\net462\System.Text.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Channels, Version=7.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Threading.Channels.7.0.0\lib\net462\System.Threading.Channels.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Tasks.Extensions, Version=4.2.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Threading.Tasks.Extensions.4.5.4\lib\net461\System.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="System.ValueTuple, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="ClientForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="ClientForm.Designer.cs">
+      <DependentUpon>ClientForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="LoginForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="LoginForm.Designer.cs">
+      <DependentUpon>LoginForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="MainForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="MainForm.Designer.cs">
+      <DependentUpon>MainForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="OrderForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="OrderForm.Designer.cs">
+      <DependentUpon>OrderForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="ServiceForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="ServiceForm.Designer.cs">
+      <DependentUpon>ServiceForm.cs</DependentUpon>
+    </Compile>
+    <EmbeddedResource Include="ClientForm.resx">
+      <DependentUpon>ClientForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="MainForm.resx">
+      <DependentUpon>MainForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <EmbeddedResource Include="ServiceForm.resx">
+      <DependentUpon>ServiceForm.cs</DependentUpon>
+    </EmbeddedResource>
+    <None Include="packages.config" />
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets" Condition="Exists('packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>Данный проект ссылается на пакеты NuGet, отсутствующие на этом компьютере. Используйте восстановление пакетов NuGet, чтобы скачать их.  Дополнительную информацию см. по адресу: http://go.microsoft.com/fwlink/?LinkID=322105. Отсутствует следующий файл: {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\Microsoft.Extensions.Logging.Abstractions.6.0.0\build\Microsoft.Extensions.Logging.Abstractions.targets'))" />
+  </Target>
+</Project>

PhotoStudioApp/PhotoStudioApp.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36401.2 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PhotoStudioApp", "PhotoStudioApp.csproj", "{4C519073-EAA7-4936-9361-72FFE3D3CDDF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4C519073-EAA7-4936-9361-72FFE3D3CDDF}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {0102972C-D6B0-41FD-AB3F-908AF8268884}
+	EndGlobalSection
+EndGlobal

PhotoStudioApp/Program.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace PhotoStudioApp
+{
+    internal static class Program
+    {
+        /// <summary>
+        /// Главная точка входа для приложения.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new LoginForm());
+        }
+    }
+}

PhotoStudioApp/Properties/AssemblyInfo.cs

@@ -0,0 +1,33 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// Общие сведения об этой сборке предоставляются следующим набором
+// набора атрибутов. Измените значения этих атрибутов для изменения сведений,
+// связанных со сборкой.
+[assembly: AssemblyTitle("PhotoStudioApp")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("PhotoStudioApp")]
+[assembly: AssemblyCopyright("Copyright ©  2026")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Установка значения False для параметра ComVisible делает типы в этой сборке невидимыми
+// для компонентов COM. Если необходимо обратиться к типу в этой сборке через
+// COM, следует установить атрибут ComVisible в TRUE для этого типа.
+[assembly: ComVisible(false)]
+
+// Следующий GUID служит для идентификации библиотеки типов, если этот проект будет видимым для COM
+[assembly: Guid("4c519073-eaa7-4936-9361-72ffe3d3cddf")]
+
+// Сведения о версии сборки состоят из указанных ниже четырех значений:
+//
+//      Основной номер версии
+//      Дополнительный номер версии
+//      Номер сборки
+//      Редакция
+//
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

PhotoStudioApp/Properties/Resources.Designer.cs

@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Этот код создан программным средством.
+//     Версия среды выполнения: 4.0.30319.42000
+//
+//     Изменения в этом файле могут привести к неправильному поведению и будут утрачены, если
+//     код создан повторно.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace PhotoStudioApp.Properties
+{
+
+
+    /// <summary>
+    ///   Класс ресурсов со строгим типом для поиска локализованных строк и пр.
+    /// </summary>
+    // Этот класс был автоматически создан при помощи StronglyTypedResourceBuilder
+    // класс с помощью таких средств, как ResGen или Visual Studio.
+    // Для добавления или удаления члена измените файл .ResX, а затем перезапустите ResGen
+    // с параметром /str или заново постройте свой VS-проект.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources
+    {
+
+        private static global::System.Resources.ResourceManager resourceMan;
+
+        private static global::System.Globalization.CultureInfo resourceCulture;
+
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources()
+        {
+        }
+
+        /// <summary>
+        ///   Возврат кэшированного экземпляра ResourceManager, используемого этим классом.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager
+        {
+            get
+            {
+                if ((resourceMan == null))
+                {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("PhotoStudioApp.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+
+        /// <summary>
+        ///   Переопределяет свойство CurrentUICulture текущего потока для всех
+        ///   подстановки ресурсов с помощью этого класса ресурсов со строгим типом.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture
+        {
+            get
+            {
+                return resourceCulture;
+            }
+            set
+            {
+                resourceCulture = value;
+            }
+        }
+    }
+}

PhotoStudioApp/Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

PhotoStudioApp/Properties/Settings.Designer.cs

@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace PhotoStudioApp.Properties
+{
+
+
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    {
+
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+        public static Settings Default
+        {
+            get
+            {
+                return defaultInstance;
+            }
+        }
+    }
+}

PhotoStudioApp/Properties/Settings.settings

@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>

PhotoStudioApp/ServiceForm.Designer.cs

@@ -0,0 +1,132 @@
+namespace PhotoStudioApp
+{
+    partial class ServiceForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.dgvServices = new System.Windows.Forms.DataGridView();
+            this.btnAdd = new System.Windows.Forms.Button();
+            this.btnEdit = new System.Windows.Forms.Button();
+            this.btnDelete = new System.Windows.Forms.Button();
+            this.btnClose = new System.Windows.Forms.Button();
+            this.lblTitle = new System.Windows.Forms.Label();
+            ((System.ComponentModel.ISupportInitialize)(this.dgvServices)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // dgvServices
+            // 
+            this.dgvServices.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
+            this.dgvServices.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dgvServices.Location = new System.Drawing.Point(27, 74);
+            this.dgvServices.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.dgvServices.MultiSelect = false;
+            this.dgvServices.Name = "dgvServices";
+            this.dgvServices.ReadOnly = true;
+            this.dgvServices.RowHeadersWidth = 51;
+            this.dgvServices.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
+            this.dgvServices.Size = new System.Drawing.Size(922, 431);
+            this.dgvServices.TabIndex = 0;
+            // 
+            // btnAdd
+            // 
+            this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnAdd.Location = new System.Drawing.Point(27, 548);
+            this.btnAdd.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnAdd.Name = "btnAdd";
+            this.btnAdd.Size = new System.Drawing.Size(180, 40);
+            this.btnAdd.TabIndex = 1;
+            this.btnAdd.Text = "Добавить услугу";
+            this.btnAdd.UseVisualStyleBackColor = true;
+            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
+            // 
+            // btnEdit
+            // 
+            this.btnEdit.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnEdit.Location = new System.Drawing.Point(215, 548);
+            this.btnEdit.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnEdit.Name = "btnEdit";
+            this.btnEdit.Size = new System.Drawing.Size(160, 40);
+            this.btnEdit.TabIndex = 2;
+            this.btnEdit.Text = "Редактировать";
+            this.btnEdit.UseVisualStyleBackColor = true;
+            this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
+            // 
+            // btnDelete
+            // 
+            this.btnDelete.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnDelete.Location = new System.Drawing.Point(383, 548);
+            this.btnDelete.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnDelete.Name = "btnDelete";
+            this.btnDelete.Size = new System.Drawing.Size(160, 40);
+            this.btnDelete.TabIndex = 3;
+            this.btnDelete.Text = "Удалить";
+            this.btnDelete.UseVisualStyleBackColor = true;
+            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
+            // 
+            // btnClose
+            // 
+            this.btnClose.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnClose.Location = new System.Drawing.Point(551, 548);
+            this.btnClose.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnClose.Name = "btnClose";
+            this.btnClose.Size = new System.Drawing.Size(160, 40);
+            this.btnClose.TabIndex = 4;
+            this.btnClose.Text = "Закрыть";
+            this.btnClose.UseVisualStyleBackColor = true;
+            this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblTitle.Location = new System.Drawing.Point(27, 25);
+            this.lblTitle.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(289, 29);
+            this.lblTitle.TabIndex = 5;
+            this.lblTitle.Text = "Управление услугами";
+            // 
+            // ServiceForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(962, 623);
+            this.Controls.Add(this.lblTitle);
+            this.Controls.Add(this.btnClose);
+            this.Controls.Add(this.btnDelete);
+            this.Controls.Add(this.btnEdit);
+            this.Controls.Add(this.btnAdd);
+            this.Controls.Add(this.dgvServices);
+            this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.Name = "ServiceForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Управление услугами";
+            ((System.ComponentModel.ISupportInitialize)(this.dgvServices)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.DataGridView dgvServices;
+        private System.Windows.Forms.Button btnAdd;
+        private System.Windows.Forms.Button btnEdit;
+        private System.Windows.Forms.Button btnDelete;
+        private System.Windows.Forms.Button btnClose;
+        private System.Windows.Forms.Label lblTitle;
+    }
+}

PhotoStudioApp/ServiceForm.cs

@@ -0,0 +1,147 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class ServiceForm : Form
+    {
+        private string _connectionString;
+
+        public ServiceForm(string connectionString)
+        {
+            InitializeComponent();
+            _connectionString = connectionString;
+            LoadServices();
+        }
+
+        private void LoadServices()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql = "select service_id, service_name, service_type, price from services";
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(sql, conn);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                // Скрываем service_id
+                dgvServices.DataSource = dt;
+                if (dgvServices.Columns.Contains("service_id"))
+                {
+                    dgvServices.Columns["service_id"].Visible = false;
+                }
+            }
+        }
+
+        private void btnAdd_Click(object sender, EventArgs e)
+        {
+            // Простая форма для добавления
+            string name = Microsoft.VisualBasic.Interaction.InputBox("Введите название услуги", "Добавление");
+            if (!string.IsNullOrEmpty(name))
+            {
+                string type = Microsoft.VisualBasic.Interaction.InputBox("Введите тип услуги (photo, video, event)", "Добавление");
+                string priceStr = Microsoft.VisualBasic.Interaction.InputBox("Введите стоимость", "Добавление");
+
+                if (decimal.TryParse(priceStr, out decimal price))
+                {
+                    using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                    {
+                        conn.Open();
+                        string sql = "insert into services (service_name, service_type, price) values (@name, @type, @price)";
+                        NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                        cmd.Parameters.AddWithValue("@name", name);
+                        cmd.Parameters.AddWithValue("@type", type);
+                        cmd.Parameters.AddWithValue("@price", price);
+                        cmd.ExecuteNonQuery();
+                        MessageBox.Show("Услуга добавлена");
+                        LoadServices();
+                    }
+                }
+                else
+                {
+                    MessageBox.Show("Некорректная стоимость");
+                }
+            }
+        }
+
+        private void btnEdit_Click(object sender, EventArgs e)
+        {
+            if (dgvServices.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvServices.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int serviceId = (int)rowView["service_id"];
+                    string currentName = rowView["service_name"].ToString();
+                    string currentType = rowView["service_type"].ToString();
+                    string currentPrice = rowView["price"].ToString();
+
+                    string name = Microsoft.VisualBasic.Interaction.InputBox("Название услуги", "Редактирование", currentName);
+                    string type = Microsoft.VisualBasic.Interaction.InputBox("Тип услуги", "Редактирование", currentType);
+                    string priceStr = Microsoft.VisualBasic.Interaction.InputBox("Стоимость", "Редактирование", currentPrice);
+
+                    if (decimal.TryParse(priceStr, out decimal price))
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            string sql = "update services set service_name = @name, service_type = @type, price = @price where service_id = @serviceId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@name", name);
+                            cmd.Parameters.AddWithValue("@type", type);
+                            cmd.Parameters.AddWithValue("@price", price);
+                            cmd.Parameters.AddWithValue("@serviceId", serviceId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Услуга обновлена");
+                            LoadServices();
+                        }
+                    }
+                    else
+                    {
+                        MessageBox.Show("Некорректная стоимость");
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите услугу для редактирования");
+            }
+        }
+
+        private void btnDelete_Click(object sender, EventArgs e)
+        {
+            if (dgvServices.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvServices.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int serviceId = (int)rowView["service_id"];
+                    if (MessageBox.Show("Удалить услугу?", "Подтверждение", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            string sql = "delete from services where service_id = @serviceId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@serviceId", serviceId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Услуга удалена");
+                            LoadServices();
+                        }
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите услугу для удаления");
+            }
+        }
+
+        private void btnClose_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

PhotoStudioApp/ServiceForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

PhotoStudioApp/packages.config

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Bcl.AsyncInterfaces" version="7.0.0" targetFramework="net472" />
+  <package id="Microsoft.Bcl.HashCode" version="1.1.1" targetFramework="net472" />
+  <package id="Microsoft.Extensions.Logging.Abstractions" version="6.0.0" targetFramework="net472" />
+  <package id="Microsoft.VisualBasic" version="10.3.0" targetFramework="net472" />
+  <package id="Npgsql" version="7.0.10" targetFramework="net472" />
+  <package id="System.Buffers" version="4.5.1" targetFramework="net472" />
+  <package id="System.Collections.Immutable" version="7.0.0" targetFramework="net472" />
+  <package id="System.Diagnostics.DiagnosticSource" version="6.0.0" targetFramework="net472" />
+  <package id="System.Memory" version="4.5.5" targetFramework="net472" />
+  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net472" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" targetFramework="net472" />
+  <package id="System.Text.Encodings.Web" version="7.0.0" targetFramework="net472" />
+  <package id="System.Text.Json" version="7.0.0" targetFramework="net472" />
+  <package id="System.Threading.Channels" version="7.0.0" targetFramework="net472" />
+  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net472" />
+  <package id="System.ValueTuple" version="4.5.0" targetFramework="net472" />
+</packages>

Program.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace PhotoStudioApp
+{
+    internal static class Program
+    {
+        /// <summary>
+        /// Главная точка входа для приложения.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new LoginForm());
+        }
+    }
+}

Properties/AssemblyInfo.cs

@@ -0,0 +1,33 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// Общие сведения об этой сборке предоставляются следующим набором
+// набора атрибутов. Измените значения этих атрибутов для изменения сведений,
+// связанных со сборкой.
+[assembly: AssemblyTitle("PhotoStudioApp")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("PhotoStudioApp")]
+[assembly: AssemblyCopyright("Copyright ©  2026")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Установка значения False для параметра ComVisible делает типы в этой сборке невидимыми
+// для компонентов COM. Если необходимо обратиться к типу в этой сборке через
+// COM, следует установить атрибут ComVisible в TRUE для этого типа.
+[assembly: ComVisible(false)]
+
+// Следующий GUID служит для идентификации библиотеки типов, если этот проект будет видимым для COM
+[assembly: Guid("4c519073-eaa7-4936-9361-72ffe3d3cddf")]
+
+// Сведения о версии сборки состоят из указанных ниже четырех значений:
+//
+//      Основной номер версии
+//      Дополнительный номер версии
+//      Номер сборки
+//      Редакция
+//
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Properties/Resources.Designer.cs

@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Этот код создан программным средством.
+//     Версия среды выполнения: 4.0.30319.42000
+//
+//     Изменения в этом файле могут привести к неправильному поведению и будут утрачены, если
+//     код создан повторно.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace PhotoStudioApp.Properties
+{
+
+
+    /// <summary>
+    ///   Класс ресурсов со строгим типом для поиска локализованных строк и пр.
+    /// </summary>
+    // Этот класс был автоматически создан при помощи StronglyTypedResourceBuilder
+    // класс с помощью таких средств, как ResGen или Visual Studio.
+    // Для добавления или удаления члена измените файл .ResX, а затем перезапустите ResGen
+    // с параметром /str или заново постройте свой VS-проект.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources
+    {
+
+        private static global::System.Resources.ResourceManager resourceMan;
+
+        private static global::System.Globalization.CultureInfo resourceCulture;
+
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources()
+        {
+        }
+
+        /// <summary>
+        ///   Возврат кэшированного экземпляра ResourceManager, используемого этим классом.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager
+        {
+            get
+            {
+                if ((resourceMan == null))
+                {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("PhotoStudioApp.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+
+        /// <summary>
+        ///   Переопределяет свойство CurrentUICulture текущего потока для всех
+        ///   подстановки ресурсов с помощью этого класса ресурсов со строгим типом.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture
+        {
+            get
+            {
+                return resourceCulture;
+            }
+            set
+            {
+                resourceCulture = value;
+            }
+        }
+    }
+}

Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

Properties/Settings.Designer.cs

@@ -0,0 +1,30 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace PhotoStudioApp.Properties
+{
+
+
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    {
+
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+        public static Settings Default
+        {
+            get
+            {
+                return defaultInstance;
+            }
+        }
+    }
+}

Properties/Settings.settings

@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>

ServiceForm.Designer.cs

@@ -0,0 +1,132 @@
+namespace PhotoStudioApp
+{
+    partial class ServiceForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.dgvServices = new System.Windows.Forms.DataGridView();
+            this.btnAdd = new System.Windows.Forms.Button();
+            this.btnEdit = new System.Windows.Forms.Button();
+            this.btnDelete = new System.Windows.Forms.Button();
+            this.btnClose = new System.Windows.Forms.Button();
+            this.lblTitle = new System.Windows.Forms.Label();
+            ((System.ComponentModel.ISupportInitialize)(this.dgvServices)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // dgvServices
+            // 
+            this.dgvServices.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
+            this.dgvServices.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dgvServices.Location = new System.Drawing.Point(27, 74);
+            this.dgvServices.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.dgvServices.MultiSelect = false;
+            this.dgvServices.Name = "dgvServices";
+            this.dgvServices.ReadOnly = true;
+            this.dgvServices.RowHeadersWidth = 51;
+            this.dgvServices.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
+            this.dgvServices.Size = new System.Drawing.Size(922, 431);
+            this.dgvServices.TabIndex = 0;
+            // 
+            // btnAdd
+            // 
+            this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnAdd.Location = new System.Drawing.Point(27, 548);
+            this.btnAdd.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnAdd.Name = "btnAdd";
+            this.btnAdd.Size = new System.Drawing.Size(180, 40);
+            this.btnAdd.TabIndex = 1;
+            this.btnAdd.Text = "Добавить услугу";
+            this.btnAdd.UseVisualStyleBackColor = true;
+            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
+            // 
+            // btnEdit
+            // 
+            this.btnEdit.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnEdit.Location = new System.Drawing.Point(215, 548);
+            this.btnEdit.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnEdit.Name = "btnEdit";
+            this.btnEdit.Size = new System.Drawing.Size(160, 40);
+            this.btnEdit.TabIndex = 2;
+            this.btnEdit.Text = "Редактировать";
+            this.btnEdit.UseVisualStyleBackColor = true;
+            this.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
+            // 
+            // btnDelete
+            // 
+            this.btnDelete.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnDelete.Location = new System.Drawing.Point(383, 548);
+            this.btnDelete.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnDelete.Name = "btnDelete";
+            this.btnDelete.Size = new System.Drawing.Size(160, 40);
+            this.btnDelete.TabIndex = 3;
+            this.btnDelete.Text = "Удалить";
+            this.btnDelete.UseVisualStyleBackColor = true;
+            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
+            // 
+            // btnClose
+            // 
+            this.btnClose.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.btnClose.Location = new System.Drawing.Point(551, 548);
+            this.btnClose.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.btnClose.Name = "btnClose";
+            this.btnClose.Size = new System.Drawing.Size(160, 40);
+            this.btnClose.TabIndex = 4;
+            this.btnClose.Text = "Закрыть";
+            this.btnClose.UseVisualStyleBackColor = true;
+            this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.lblTitle.Location = new System.Drawing.Point(27, 25);
+            this.lblTitle.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(289, 29);
+            this.lblTitle.TabIndex = 5;
+            this.lblTitle.Text = "Управление услугами";
+            // 
+            // ServiceForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(962, 623);
+            this.Controls.Add(this.lblTitle);
+            this.Controls.Add(this.btnClose);
+            this.Controls.Add(this.btnDelete);
+            this.Controls.Add(this.btnEdit);
+            this.Controls.Add(this.btnAdd);
+            this.Controls.Add(this.dgvServices);
+            this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
+            this.Name = "ServiceForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Управление услугами";
+            ((System.ComponentModel.ISupportInitialize)(this.dgvServices)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.DataGridView dgvServices;
+        private System.Windows.Forms.Button btnAdd;
+        private System.Windows.Forms.Button btnEdit;
+        private System.Windows.Forms.Button btnDelete;
+        private System.Windows.Forms.Button btnClose;
+        private System.Windows.Forms.Label lblTitle;
+    }
+}

ServiceForm.cs

@@ -0,0 +1,147 @@
+using System;
+using System.Data;
+using System.Windows.Forms;
+using Npgsql;
+
+namespace PhotoStudioApp
+{
+    public partial class ServiceForm : Form
+    {
+        private string _connectionString;
+
+        public ServiceForm(string connectionString)
+        {
+            InitializeComponent();
+            _connectionString = connectionString;
+            LoadServices();
+        }
+
+        private void LoadServices()
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+            {
+                conn.Open();
+                string sql = "select service_id, service_name, service_type, price from services";
+                NpgsqlDataAdapter adapter = new NpgsqlDataAdapter(sql, conn);
+                DataTable dt = new DataTable();
+                adapter.Fill(dt);
+
+                // Скрываем service_id
+                dgvServices.DataSource = dt;
+                if (dgvServices.Columns.Contains("service_id"))
+                {
+                    dgvServices.Columns["service_id"].Visible = false;
+                }
+            }
+        }
+
+        private void btnAdd_Click(object sender, EventArgs e)
+        {
+            // Простая форма для добавления
+            string name = Microsoft.VisualBasic.Interaction.InputBox("Введите название услуги", "Добавление");
+            if (!string.IsNullOrEmpty(name))
+            {
+                string type = Microsoft.VisualBasic.Interaction.InputBox("Введите тип услуги (photo, video, event)", "Добавление");
+                string priceStr = Microsoft.VisualBasic.Interaction.InputBox("Введите стоимость", "Добавление");
+
+                if (decimal.TryParse(priceStr, out decimal price))
+                {
+                    using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                    {
+                        conn.Open();
+                        string sql = "insert into services (service_name, service_type, price) values (@name, @type, @price)";
+                        NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                        cmd.Parameters.AddWithValue("@name", name);
+                        cmd.Parameters.AddWithValue("@type", type);
+                        cmd.Parameters.AddWithValue("@price", price);
+                        cmd.ExecuteNonQuery();
+                        MessageBox.Show("Услуга добавлена");
+                        LoadServices();
+                    }
+                }
+                else
+                {
+                    MessageBox.Show("Некорректная стоимость");
+                }
+            }
+        }
+
+        private void btnEdit_Click(object sender, EventArgs e)
+        {
+            if (dgvServices.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvServices.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int serviceId = (int)rowView["service_id"];
+                    string currentName = rowView["service_name"].ToString();
+                    string currentType = rowView["service_type"].ToString();
+                    string currentPrice = rowView["price"].ToString();
+
+                    string name = Microsoft.VisualBasic.Interaction.InputBox("Название услуги", "Редактирование", currentName);
+                    string type = Microsoft.VisualBasic.Interaction.InputBox("Тип услуги", "Редактирование", currentType);
+                    string priceStr = Microsoft.VisualBasic.Interaction.InputBox("Стоимость", "Редактирование", currentPrice);
+
+                    if (decimal.TryParse(priceStr, out decimal price))
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            string sql = "update services set service_name = @name, service_type = @type, price = @price where service_id = @serviceId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@name", name);
+                            cmd.Parameters.AddWithValue("@type", type);
+                            cmd.Parameters.AddWithValue("@price", price);
+                            cmd.Parameters.AddWithValue("@serviceId", serviceId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Услуга обновлена");
+                            LoadServices();
+                        }
+                    }
+                    else
+                    {
+                        MessageBox.Show("Некорректная стоимость");
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите услугу для редактирования");
+            }
+        }
+
+        private void btnDelete_Click(object sender, EventArgs e)
+        {
+            if (dgvServices.SelectedRows.Count > 0)
+            {
+                DataRowView rowView = dgvServices.SelectedRows[0].DataBoundItem as DataRowView;
+                if (rowView != null)
+                {
+                    int serviceId = (int)rowView["service_id"];
+                    if (MessageBox.Show("Удалить услугу?", "Подтверждение", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    {
+                        using (NpgsqlConnection conn = new NpgsqlConnection(_connectionString))
+                        {
+                            conn.Open();
+                            string sql = "delete from services where service_id = @serviceId";
+                            NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
+                            cmd.Parameters.AddWithValue("@serviceId", serviceId);
+                            cmd.ExecuteNonQuery();
+                            MessageBox.Show("Услуга удалена");
+                            LoadServices();
+                        }
+                    }
+                }
+            }
+            else
+            {
+                MessageBox.Show("Выберите услугу для удаления");
+            }
+        }
+
+        private void btnClose_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

ServiceForm.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

packages.config

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Bcl.AsyncInterfaces" version="7.0.0" targetFramework="net472" />
+  <package id="Microsoft.Bcl.HashCode" version="1.1.1" targetFramework="net472" />
+  <package id="Microsoft.Extensions.Logging.Abstractions" version="6.0.0" targetFramework="net472" />
+  <package id="Microsoft.VisualBasic" version="10.3.0" targetFramework="net472" />
+  <package id="Npgsql" version="7.0.10" targetFramework="net472" />
+  <package id="System.Buffers" version="4.5.1" targetFramework="net472" />
+  <package id="System.Collections.Immutable" version="7.0.0" targetFramework="net472" />
+  <package id="System.Diagnostics.DiagnosticSource" version="6.0.0" targetFramework="net472" />
+  <package id="System.Memory" version="4.5.5" targetFramework="net472" />
+  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net472" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" targetFramework="net472" />
+  <package id="System.Text.Encodings.Web" version="7.0.0" targetFramework="net472" />
+  <package id="System.Text.Json" version="7.0.0" targetFramework="net472" />
+  <package id="System.Threading.Channels" version="7.0.0" targetFramework="net472" />
+  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net472" />
+  <package id="System.ValueTuple" version="4.5.0" targetFramework="net472" />
+</packages>