init commit

App.axaml

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+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="demo_hard.App"
+             RequestedThemeVariant="Default">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.Styles>
+        <FluentTheme />
+    </Application.Styles>
+</Application>

App.axaml.cs

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+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace demo_hard;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow();
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

FunctionWindow.axaml

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+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="demo_hard.FunctionWindow"
+        x:CompileBindings="False"
+        Title="FunctionWindow">
+    <DockPanel>
+        <StackPanel DockPanel.Dock="Top" HorizontalAlignment="Center" Orientation="Horizontal" >
+            <StackPanel>
+            <Image></Image>
+            </StackPanel>
+            <StackPanel>
+                <TextBlock>
+                    <Run Text="ФИО:"/>
+                    <Run Text="{}"/>
+                </TextBlock>
+                <TextBlock>
+                    <Run Text="Роль"/>
+                    <Run Text="{}"/>
+                </TextBlock>
+            </StackPanel>
+        </StackPanel>
+    </DockPanel>
+</Window>

FunctionWindow.axaml.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using demo_hard.Models;
+
+namespace demo_hard;
+
+public partial class FunctionWindow : Window
+{
+    public FunctionWindow()
+    {
+        InitializeComponent();
+        DataContext = new Employee();
+    }
+}

MainWindow.axaml

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+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="demo_hard.MainWindow"
+        Title="demo_hard">
+    <DockPanel>
+        <StackPanel HorizontalAlignment="Center" Orientation="Horizontal" DockPanel.Dock="Top">
+            <TextBlock Text="Точки проката горнолыжного комплекса «Благодать»"/>
+        </StackPanel>
+        <StackPanel Orientation="Vertical" VerticalAlignment="Center" Margin="5">
+            <TextBlock Text="Введите логин" HorizontalAlignment="Center" Margin="5"/>
+            <TextBox  x:Name="LoginBox" Margin="5" Width="200"/>
+            <TextBlock Text="Введите пароль" HorizontalAlignment="Center" Margin="5"/>
+            <TextBox  x:Name="PasswordBox" Margin="5" Width="200" PasswordChar="*"/>
+            <Button x:Name="ForPassword" Content="Показать пароль" Margin="5" Click="TogglePasswordVisibility" HorizontalAlignment="Center"/>
+            <Button x:Name="Authorize" Content="Авторизироваться" Margin="5" Click="AuthorizeButton" HorizontalAlignment="Center"/>
+        </StackPanel>
+        
+    </DockPanel>
+</Window>

MainWindow.axaml.cs

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+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace demo_hard;
+
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+
+    private void TogglePasswordVisibility(object? sender, RoutedEventArgs e)
+    {
+        PasswordBox.PasswordChar = PasswordBox.PasswordChar == '*' ? '\0' : '*';
+    }
+
+    private void AuthorizeButton(object? sender, RoutedEventArgs e)
+    {
+        new FunctionWindow().ShowDialog(this);
+    }
+}

Models/Client.cs

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+using System;
+using System.Collections.Generic;
+
+namespace demo_hard.Models;
+
+public partial class Client
+{
+    public int Id { get; set; }
+
+    public string Fio { get; set; } = null!;
+
+    public int CodeClient { get; set; }
+
+    public string Passport { get; set; } = null!;
+
+    public DateOnly Birthday { get; set; }
+
+    public string Address { get; set; } = null!;
+
+    public string Email { get; set; } = null!;
+
+    public string Password { get; set; } = null!;
+
+    public int? RoleId { get; set; }
+}

Models/Employee.cs

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+using System;
+using System.Collections.Generic;
+
+namespace demo_hard.Models;
+
+public partial class Employee
+{
+    public int Id { get; set; }
+
+    public int EmployeeId { get; set; }
+
+    public string Role { get; set; } = null!;
+
+    public string Fio { get; set; } = null!;
+
+    public string Login { get; set; } = null!;
+
+    public string Password { get; set; } = null!;
+
+    public DateTime? LastEnter { get; set; }
+
+    public string? TypeEnter { get; set; }
+
+    public string? Photo { get; set; }
+}

Models/Order.cs

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+using System;
+using System.Collections.Generic;
+
+namespace demo_hard.Models;
+
+public partial class Order
+{
+    public int OrderId { get; set; }
+
+    public string? OrderCode { get; set; }
+
+    public DateOnly? Date { get; set; }
+
+    public TimeOnly? Time { get; set; }
+
+    public int? CodeClient { get; set; }
+
+    public string? ServiceId { get; set; }
+
+    public string? Status { get; set; }
+
+    public DateOnly? DateClose { get; set; }
+
+    public int? RentalTime { get; set; }
+}

Models/Role.cs

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+using System;
+using System.Collections.Generic;
+
+namespace demo_hard.Models;
+
+public partial class Role
+{
+    public int RoleId { get; set; }
+
+    public string RoleName { get; set; } = null!;
+}

Models/Service.cs

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+using System;
+using System.Collections.Generic;
+
+namespace demo_hard.Models;
+
+public partial class Service
+{
+    public int Id { get; set; }
+
+    public int ServiceId { get; set; }
+
+    public string ServiceName { get; set; } = null!;
+
+    public string ServiceCode { get; set; } = null!;
+
+    public int ServiceCost { get; set; }
+}

Models/User2Context.cs

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+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+
+namespace demo_hard.Models;
+
+public partial class User2Context : DbContext
+{
+    public User2Context()
+    {
+    }
+
+    public User2Context(DbContextOptions<User2Context> options)
+        : base(options)
+    {
+    }
+
+    public virtual DbSet<Client> Clients { get; set; }
+
+    public virtual DbSet<Employee> Employees { get; set; }
+
+    public virtual DbSet<Order> Orders { get; set; }
+
+    public virtual DbSet<Role> Roles { get; set; }
+
+    public virtual DbSet<Service> Services { get; set; }
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+#warning To protect potentially sensitive information in your connection string, you should move it out of source code. You can avoid scaffolding the connection string by using the Name= syntax to read it from configuration - see https://go.microsoft.com/fwlink/?linkid=2131148. For more guidance on storing connection strings, see https://go.microsoft.com/fwlink/?LinkId=723263.
+        => optionsBuilder.UseNpgsql("Host=45.67.56.214;Port=5454;USERNAME=user2;DATABASE=user2;Password=hGcLvi0i");
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Client>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("clients_pk");
+
+            entity.ToTable("clients");
+
+            entity.HasIndex(e => e.CodeClient, "clients_unique").IsUnique();
+
+            entity.HasIndex(e => e.Passport, "clients_unique_1").IsUnique();
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Address)
+                .HasColumnType("character varying")
+                .HasColumnName("address");
+            entity.Property(e => e.Birthday).HasColumnName("birthday");
+            entity.Property(e => e.CodeClient).HasColumnName("code_client");
+            entity.Property(e => e.Email)
+                .HasColumnType("character varying")
+                .HasColumnName("email");
+            entity.Property(e => e.Fio)
+                .HasColumnType("character varying")
+                .HasColumnName("fio");
+            entity.Property(e => e.Passport)
+                .HasColumnType("character varying")
+                .HasColumnName("passport");
+            entity.Property(e => e.Password)
+                .HasColumnType("character varying")
+                .HasColumnName("password");
+            entity.Property(e => e.RoleId).HasColumnName("role_id");
+        });
+
+        modelBuilder.Entity<Employee>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("employees_pk");
+
+            entity.ToTable("employees");
+
+            entity.HasIndex(e => e.EmployeeId, "employees_unique").IsUnique();
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.EmployeeId).HasColumnName("employee_id");
+            entity.Property(e => e.Fio)
+                .HasColumnType("character varying")
+                .HasColumnName("fio");
+            entity.Property(e => e.LastEnter)
+                .HasColumnType("timestamp without time zone")
+                .HasColumnName("last_enter");
+            entity.Property(e => e.Login)
+                .HasColumnType("character varying")
+                .HasColumnName("login");
+            entity.Property(e => e.Password)
+                .HasColumnType("character varying")
+                .HasColumnName("password");
+            entity.Property(e => e.Photo)
+                .HasColumnType("character varying")
+                .HasColumnName("photo");
+            entity.Property(e => e.Role)
+                .HasColumnType("character varying")
+                .HasColumnName("role");
+            entity.Property(e => e.TypeEnter)
+                .HasColumnType("character varying")
+                .HasColumnName("type_enter");
+        });
+
+        modelBuilder.Entity<Order>(entity =>
+        {
+            entity.HasKey(e => e.OrderId).HasName("orders_pk");
+
+            entity.ToTable("orders");
+
+            entity.Property(e => e.OrderId)
+                .UseIdentityAlwaysColumn()
+                .HasColumnName("order_id");
+            entity.Property(e => e.CodeClient).HasColumnName("code_client");
+            entity.Property(e => e.Date).HasColumnName("date");
+            entity.Property(e => e.DateClose).HasColumnName("date_close");
+            entity.Property(e => e.OrderCode)
+                .HasColumnType("character varying")
+                .HasColumnName("order_code");
+            entity.Property(e => e.RentalTime).HasColumnName("rental_time");
+            entity.Property(e => e.ServiceId)
+                .HasColumnType("character varying")
+                .HasColumnName("service_id");
+            entity.Property(e => e.Status)
+                .HasColumnType("character varying")
+                .HasColumnName("status");
+            entity.Property(e => e.Time).HasColumnName("time");
+        });
+
+        modelBuilder.Entity<Role>(entity =>
+        {
+            entity.HasKey(e => e.RoleId).HasName("roles_pk");
+
+            entity.ToTable("roles");
+
+            entity.Property(e => e.RoleId).HasColumnName("role_id");
+            entity.Property(e => e.RoleName)
+                .HasColumnType("character varying")
+                .HasColumnName("role_name");
+        });
+
+        modelBuilder.Entity<Service>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("services_pk");
+
+            entity.ToTable("services");
+
+            entity.HasIndex(e => e.ServiceId, "services_unique").IsUnique();
+
+            entity.HasIndex(e => e.ServiceCode, "services_unique_1").IsUnique();
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.ServiceCode)
+                .HasColumnType("character varying")
+                .HasColumnName("service_code");
+            entity.Property(e => e.ServiceCost).HasColumnName("service_cost");
+            entity.Property(e => e.ServiceId).HasColumnName("service_id");
+            entity.Property(e => e.ServiceName)
+                .HasColumnType("character varying")
+                .HasColumnName("service_name");
+        });
+
+        OnModelCreatingPartial(modelBuilder);
+    }
+
+    partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
+}

Program.cs

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+using Avalonia;
+using System;
+
+namespace demo_hard;
+
+class Program
+{
+    // Initialization code. Don't use any Avalonia, third-party APIs or any
+    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+    // yet and stuff might break.
+    [STAThread]
+    public static void Main(string[] args) => BuildAvaloniaApp()
+        .StartWithClassicDesktopLifetime(args);
+
+    // Avalonia configuration, don't remove; also used by visual designer.
+    public static AppBuilder BuildAvaloniaApp()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            .WithInterFont()
+            .LogToTrace();
+}

app.manifest

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+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <!-- This manifest is used on Windows only.
+       Don't remove it as it might cause problems with window transparency and embedded controls.
+       For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+  <assemblyIdentity version="1.0.0.0" name="demo_hard.Desktop"/>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on
+           and is designed to work with. Uncomment the appropriate elements
+           and Windows will automatically select the most compatible environment. -->
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>

bin/Debug/net8.0/demo_hard.runtimeconfig.json

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+{
+  "runtimeOptions": {
+    "tfm": "net8.0",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "8.0.0"
+    },
+    "configProperties": {
+      "System.Reflection.NullabilityInfoContext.IsSupported": true,
+      "System.Runtime.InteropServices.BuiltInComInterop.IsSupported": true,
+      "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": false
+    }
+  }
+}