Добавьте файлы проекта.

ServiceApp.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35222.181
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ServiceApp", "ServiceApp\ServiceApp.csproj", "{F2BD7127-5A3B-4AF1-89E4-C60B70EB2E6B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F2BD7127-5A3B-4AF1-89E4-C60B70EB2E6B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F2BD7127-5A3B-4AF1-89E4-C60B70EB2E6B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F2BD7127-5A3B-4AF1-89E4-C60B70EB2E6B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F2BD7127-5A3B-4AF1-89E4-C60B70EB2E6B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {A812EF99-15E4-4DD1-A3AD-370E1AB49A94}
+	EndGlobalSection
+EndGlobal

ServiceApp/App.axaml

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+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="ServiceApp.App"
+             RequestedThemeVariant="Default">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.Styles>
+        <FluentTheme />
+    </Application.Styles>
+	<Application.Resources>
+		<SolidColorBrush x:Key="PrimaryColor" Color="#ffffff"/>
+		<SolidColorBrush x:Key="SecondaryColor" Color="#ffffe1"/>
+		<SolidColorBrush x:Key="AccentColor" Color="#ff9c1a"/>
+	</Application.Resources>
+</Application>

ServiceApp/App.axaml.cs

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+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace ServiceApp
+{
+    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();
+        }
+    }
+}

ServiceApp/EntityModels/Client.cs

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+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Client
+{
+    public int Id { get; set; }
+
+    public string Firstname { get; set; } = null!;
+
+    public string Lastname { get; set; } = null!;
+
+    public string? Patronymic { get; set; }
+
+    public DateOnly? Birthday { get; set; }
+
+    public DateTime Registrationdate { get; set; }
+
+    public string? Email { get; set; }
+
+    public string Phone { get; set; } = null!;
+
+    public int Gendercode { get; set; }
+
+    public string? Photopath { get; set; }
+
+    public virtual ICollection<Clientservice> Clientservices { get; set; } = new List<Clientservice>();
+
+    public virtual Gender GendercodeNavigation { get; set; } = null!;
+
+    public virtual ICollection<Tag> Tags { get; set; } = new List<Tag>();
+}

ServiceApp/EntityModels/Clientservice.cs

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+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Clientservice
+{
+    public int Id { get; set; }
+
+    public int Clientid { get; set; }
+
+    public int Serviceid { get; set; }
+
+    public DateTime Starttime { get; set; }
+
+    public string? Comment { get; set; }
+
+    public virtual Client Client { get; set; } = null!;
+
+    public virtual ICollection<Documentbyservice> Documentbyservices { get; set; } = new List<Documentbyservice>();
+
+    public virtual ICollection<Productsale> Productsales { get; set; } = new List<Productsale>();
+
+    public virtual Service Service { get; set; } = null!;
+}

ServiceApp/EntityModels/Documentbyservice.cs

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+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Documentbyservice
+{
+    public int Id { get; set; }
+
+    public int Clientserviceid { get; set; }
+
+    public string Documentpath { get; set; } = null!;
+
+    public virtual Clientservice Clientservice { get; set; } = null!;
+}

ServiceApp/EntityModels/Gender.cs

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+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Gender
+{
+    public int Code { get; set; }
+
+    public string? Name { get; set; }
+
+    public virtual ICollection<Client> Clients { get; set; } = new List<Client>();
+}

ServiceApp/EntityModels/IsajkinContext.cs

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+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+
+namespace ServiceApp.EnityModels;
+
+public partial class IsajkinContext : DbContext
+{
+    public IsajkinContext()
+    {
+    }
+
+    public IsajkinContext(DbContextOptions<IsajkinContext> options)
+        : base(options)
+    {
+    }
+
+    public virtual DbSet<Client> Clients { get; set; }
+
+    public virtual DbSet<Clientservice> Clientservices { get; set; }
+
+    public virtual DbSet<Documentbyservice> Documentbyservices { get; set; }
+
+    public virtual DbSet<Gender> Genders { get; set; }
+
+    public virtual DbSet<Manufacturer> Manufacturers { get; set; }
+
+    public virtual DbSet<Product> Products { get; set; }
+
+    public virtual DbSet<Productphoto> Productphotos { get; set; }
+
+    public virtual DbSet<Productsale> Productsales { get; set; }
+
+    public virtual DbSet<Service> Services { get; set; }
+
+    public virtual DbSet<Servicephoto> Servicephotos { get; set; }
+
+    public virtual DbSet<Tag> Tags { 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=isajkin;Password=hqD9f9EZ");
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Client>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("client_pkey");
+
+            entity.ToTable("client");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Birthday).HasColumnName("birthday");
+            entity.Property(e => e.Email)
+                .HasMaxLength(255)
+                .HasColumnName("email");
+            entity.Property(e => e.Firstname)
+                .HasMaxLength(50)
+                .HasColumnName("firstname");
+            entity.Property(e => e.Gendercode).HasColumnName("gendercode");
+            entity.Property(e => e.Lastname)
+                .HasMaxLength(50)
+                .HasColumnName("lastname");
+            entity.Property(e => e.Patronymic)
+                .HasMaxLength(50)
+                .HasColumnName("patronymic");
+            entity.Property(e => e.Phone)
+                .HasMaxLength(20)
+                .HasColumnName("phone");
+            entity.Property(e => e.Photopath)
+                .HasMaxLength(1000)
+                .HasColumnName("photopath");
+            entity.Property(e => e.Registrationdate)
+                .HasColumnType("timestamp(6) without time zone")
+                .HasColumnName("registrationdate");
+
+            entity.HasOne(d => d.GendercodeNavigation).WithMany(p => p.Clients)
+                .HasForeignKey(d => d.Gendercode)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_client_gender");
+
+            entity.HasMany(d => d.Tags).WithMany(p => p.Clients)
+                .UsingEntity<Dictionary<string, object>>(
+                    "Tagofclient",
+                    r => r.HasOne<Tag>().WithMany()
+                        .HasForeignKey("Tagid")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("fk_tagofclient_tag"),
+                    l => l.HasOne<Client>().WithMany()
+                        .HasForeignKey("Clientid")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("fk_tagofclient_client"),
+                    j =>
+                    {
+                        j.HasKey("Clientid", "Tagid").HasName("tagofclient_pkey");
+                        j.ToTable("tagofclient");
+                        j.IndexerProperty<int>("Clientid").HasColumnName("clientid");
+                        j.IndexerProperty<int>("Tagid").HasColumnName("tagid");
+                    });
+        });
+
+        modelBuilder.Entity<Clientservice>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("clientservice_pkey");
+
+            entity.ToTable("clientservice");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Clientid).HasColumnName("clientid");
+            entity.Property(e => e.Comment).HasColumnName("comment");
+            entity.Property(e => e.Serviceid).HasColumnName("serviceid");
+            entity.Property(e => e.Starttime)
+                .HasColumnType("timestamp(6) without time zone")
+                .HasColumnName("starttime");
+
+            entity.HasOne(d => d.Client).WithMany(p => p.Clientservices)
+                .HasForeignKey(d => d.Clientid)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_clientservice_client");
+
+            entity.HasOne(d => d.Service).WithMany(p => p.Clientservices)
+                .HasForeignKey(d => d.Serviceid)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_clientservice_service");
+        });
+
+        modelBuilder.Entity<Documentbyservice>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("documentbyservice_pkey");
+
+            entity.ToTable("documentbyservice");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Clientserviceid).HasColumnName("clientserviceid");
+            entity.Property(e => e.Documentpath)
+                .HasMaxLength(1000)
+                .HasColumnName("documentpath");
+
+            entity.HasOne(d => d.Clientservice).WithMany(p => p.Documentbyservices)
+                .HasForeignKey(d => d.Clientserviceid)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_documentbyservice_clientservice");
+        });
+
+        modelBuilder.Entity<Gender>(entity =>
+        {
+            entity.HasKey(e => e.Code).HasName("gender_pkey");
+
+            entity.ToTable("gender");
+
+            entity.Property(e => e.Code).HasColumnName("code");
+            entity.Property(e => e.Name)
+                .HasMaxLength(10)
+                .HasColumnName("name");
+        });
+
+        modelBuilder.Entity<Manufacturer>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("manufacturer_pkey");
+
+            entity.ToTable("manufacturer");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Name)
+                .HasMaxLength(100)
+                .HasColumnName("name");
+            entity.Property(e => e.Startdate).HasColumnName("startdate");
+        });
+
+        modelBuilder.Entity<Product>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("product_pkey");
+
+            entity.ToTable("product");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Cost)
+                .HasPrecision(19, 4)
+                .HasColumnName("cost");
+            entity.Property(e => e.Description).HasColumnName("description");
+            entity.Property(e => e.Isactive).HasColumnName("isactive");
+            entity.Property(e => e.Mainimagepath)
+                .HasMaxLength(1000)
+                .HasColumnName("mainimagepath");
+            entity.Property(e => e.Manufacturerid).HasColumnName("manufacturerid");
+            entity.Property(e => e.Title)
+                .HasMaxLength(100)
+                .HasColumnName("title");
+
+            entity.HasOne(d => d.Manufacturer).WithMany(p => p.Products)
+                .HasForeignKey(d => d.Manufacturerid)
+                .HasConstraintName("fk_product_manufacturer");
+
+            entity.HasMany(d => d.Attachedproducts).WithMany(p => p.Mainproducts)
+                .UsingEntity<Dictionary<string, object>>(
+                    "Attachedproduct",
+                    r => r.HasOne<Product>().WithMany()
+                        .HasForeignKey("Attachedproductid")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("fk_attachedproduct_product1"),
+                    l => l.HasOne<Product>().WithMany()
+                        .HasForeignKey("Mainproductid")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("fk_attachedproduct_product"),
+                    j =>
+                    {
+                        j.HasKey("Mainproductid", "Attachedproductid").HasName("attachedproduct_pkey");
+                        j.ToTable("attachedproduct");
+                        j.IndexerProperty<int>("Mainproductid").HasColumnName("mainproductid");
+                        j.IndexerProperty<int>("Attachedproductid").HasColumnName("attachedproductid");
+                    });
+
+            entity.HasMany(d => d.Mainproducts).WithMany(p => p.Attachedproducts)
+                .UsingEntity<Dictionary<string, object>>(
+                    "Attachedproduct",
+                    r => r.HasOne<Product>().WithMany()
+                        .HasForeignKey("Mainproductid")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("fk_attachedproduct_product"),
+                    l => l.HasOne<Product>().WithMany()
+                        .HasForeignKey("Attachedproductid")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("fk_attachedproduct_product1"),
+                    j =>
+                    {
+                        j.HasKey("Mainproductid", "Attachedproductid").HasName("attachedproduct_pkey");
+                        j.ToTable("attachedproduct");
+                        j.IndexerProperty<int>("Mainproductid").HasColumnName("mainproductid");
+                        j.IndexerProperty<int>("Attachedproductid").HasColumnName("attachedproductid");
+                    });
+        });
+
+        modelBuilder.Entity<Productphoto>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("productphoto_pkey");
+
+            entity.ToTable("productphoto");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Photopath)
+                .HasMaxLength(1000)
+                .HasColumnName("photopath");
+            entity.Property(e => e.Productid).HasColumnName("productid");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.Productphotos)
+                .HasForeignKey(d => d.Productid)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_productphoto_product");
+        });
+
+        modelBuilder.Entity<Productsale>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("productsale_pkey");
+
+            entity.ToTable("productsale");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Clientserviceid).HasColumnName("clientserviceid");
+            entity.Property(e => e.Productid).HasColumnName("productid");
+            entity.Property(e => e.Quantity).HasColumnName("quantity");
+            entity.Property(e => e.Saledate)
+                .HasColumnType("timestamp(6) without time zone")
+                .HasColumnName("saledate");
+
+            entity.HasOne(d => d.Clientservice).WithMany(p => p.Productsales)
+                .HasForeignKey(d => d.Clientserviceid)
+                .HasConstraintName("fk_productsale_clientservice");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.Productsales)
+                .HasForeignKey(d => d.Productid)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_productsale_product");
+        });
+
+        modelBuilder.Entity<Service>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("service_pkey");
+
+            entity.ToTable("service");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Cost)
+                .HasPrecision(19, 4)
+                .HasColumnName("cost");
+            entity.Property(e => e.Description).HasColumnName("description");
+            entity.Property(e => e.Discount).HasColumnName("discount");
+            entity.Property(e => e.Durationinminutes).HasColumnName("durationinminutes");
+            entity.Property(e => e.Mainimagepath)
+                .HasMaxLength(1000)
+                .HasColumnName("mainimagepath");
+            entity.Property(e => e.Title)
+                .HasMaxLength(100)
+                .HasColumnName("title");
+        });
+
+        modelBuilder.Entity<Servicephoto>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("servicephoto_pkey");
+
+            entity.ToTable("servicephoto");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Photopath)
+                .HasMaxLength(1000)
+                .HasColumnName("photopath");
+            entity.Property(e => e.Serviceid).HasColumnName("serviceid");
+
+            entity.HasOne(d => d.Service).WithMany(p => p.Servicephotos)
+                .HasForeignKey(d => d.Serviceid)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("fk_servicephoto_service");
+        });
+
+        modelBuilder.Entity<Tag>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("tag_pkey");
+
+            entity.ToTable("tag");
+
+            entity.Property(e => e.Id).HasColumnName("id");
+            entity.Property(e => e.Color)
+                .HasMaxLength(6)
+                .IsFixedLength()
+                .HasColumnName("color");
+            entity.Property(e => e.Title)
+                .HasMaxLength(30)
+                .HasColumnName("title");
+        });
+
+        OnModelCreatingPartial(modelBuilder);
+    }
+
+    partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
+}

ServiceApp/EntityModels/Manufacturer.cs

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+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Manufacturer
+{
+    public int Id { get; set; }
+
+    public string Name { get; set; } = null!;
+
+    public DateOnly? Startdate { get; set; }
+
+    public virtual ICollection<Product> Products { get; set; } = new List<Product>();
+}

ServiceApp/EntityModels/Product.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Product
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public decimal Cost { get; set; }
+
+    public string? Description { get; set; }
+
+    public string? Mainimagepath { get; set; }
+
+    public int Isactive { get; set; }
+
+    public int? Manufacturerid { get; set; }
+
+    public virtual Manufacturer? Manufacturer { get; set; }
+
+    public virtual ICollection<Productphoto> Productphotos { get; set; } = new List<Productphoto>();
+
+    public virtual ICollection<Productsale> Productsales { get; set; } = new List<Productsale>();
+
+    public virtual ICollection<Product> Attachedproducts { get; set; } = new List<Product>();
+
+    public virtual ICollection<Product> Mainproducts { get; set; } = new List<Product>();
+}

ServiceApp/EntityModels/Productphoto.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Productphoto
+{
+    public int Id { get; set; }
+
+    public int Productid { get; set; }
+
+    public string Photopath { get; set; } = null!;
+
+    public virtual Product Product { get; set; } = null!;
+}

ServiceApp/EntityModels/Productsale.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Productsale
+{
+    public int Id { get; set; }
+
+    public DateTime Saledate { get; set; }
+
+    public int Productid { get; set; }
+
+    public int Quantity { get; set; }
+
+    public int? Clientserviceid { get; set; }
+
+    public virtual Clientservice? Clientservice { get; set; }
+
+    public virtual Product Product { get; set; } = null!;
+}

ServiceApp/EntityModels/Service.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Service
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public decimal Cost { get; set; }
+
+    public int Durationinminutes { get; set; }
+
+    public string? Description { get; set; }
+
+    public double? Discount { get; set; }
+
+    public string? Mainimagepath { get; set; }
+
+    public virtual ICollection<Clientservice> Clientservices { get; set; } = new List<Clientservice>();
+
+    public virtual ICollection<Servicephoto> Servicephotos { get; set; } = new List<Servicephoto>();
+}

ServiceApp/EntityModels/Servicephoto.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Servicephoto
+{
+    public int Id { get; set; }
+
+    public int Serviceid { get; set; }
+
+    public string Photopath { get; set; } = null!;
+
+    public virtual Service Service { get; set; } = null!;
+}

ServiceApp/EntityModels/Tag.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace ServiceApp.EnityModels;
+
+public partial class Tag
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public string Color { get; set; } = null!;
+
+    public virtual ICollection<Client> Clients { get; set; } = new List<Client>();
+}

ServiceApp/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="ServiceApp.MainWindow"
+		x:CompileBindings="False"
+        Title="ServiceApp">
+	<StackPanel
+		Spacing="20"
+		HorizontalAlignment="Center" 
+		VerticalAlignment="Center" 
+		Orientation="Vertical">
+		<TextBlock>Введите код для перехода в режим авдминистратора</TextBlock>
+		<TextBox Name="CodeTextBox" Width="150"/>
+		<StackPanel 
+			Spacing="10"
+			HorizontalAlignment="Center"
+			Orientation="Horizontal">
+			<Button
+				Click="LoginAdminButton_Click"
+				Name="LoginAdminButton"
+				>Войти</Button>
+			<Button 
+				Click="LoginClientButton_Click"
+				Name="LoginClientButton"
+				>Режим клиента</Button>
+		</StackPanel>
+	</StackPanel>
+</Window>

ServiceApp/MainWindow.axaml.cs

@@ -0,0 +1,27 @@
+using Avalonia.Controls;
+
+namespace ServiceApp
+{
+    public partial class MainWindow : Window
+    {
+        private string _secretCode = "0000";
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void LoginClientButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+        {
+            new ServiceWindow().Show();
+            this.Close();
+        }
+        private void LoginAdminButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+        {
+            if (CodeTextBox.Text == _secretCode) {
+                new ServiceAdminWindow().Show();
+                this.Close();
+            }
+        }
+
+    }
+}

ServiceApp/Program.cs

@@ -0,0 +1,22 @@
+using Avalonia;
+using System;
+
+namespace ServiceApp
+{
+    internal 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();
+    }
+}

ServiceApp/ServiceApp.csproj

@@ -0,0 +1,39 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+  </PropertyGroup>
+
+	<ItemGroup>
+		<AvaloniaResource Include="Assets\**" />
+	</ItemGroup>
+
+	<ItemGroup>
+	  <None Remove="Assets\download.png" />
+	</ItemGroup>
+	
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.1.0" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.1.0" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.1.0" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.1.0" />
+    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+    <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.1.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.0" />
+  </ItemGroup>
+	
+  <ItemGroup>
+    <Compile Update="ServiceWindowAdmin.axaml.cs">
+      <DependentUpon>ServiceWindowAdmin.axaml</DependentUpon>
+    </Compile>
+  </ItemGroup>
+</Project>

ServiceApp/ServiceWindow.axaml

@@ -0,0 +1,62 @@
+<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:CompileBindings="False"
+        x:Class="ServiceApp.ServiceWindow"
+        Title="ServiceWindow">
+	<DockPanel>
+		<Border 
+			DockPanel.Dock="Top" 
+			Name="SearchPanel">
+			<StackPanel
+				HorizontalAlignment="Center"
+				Orientation="Horizontal"
+				Spacing="20">
+				<TextBox 
+					Name="SearchTextBox"
+					Width="200"
+					TextChanged="SearchTextBox_TextChanged"
+					/>
+				<ComboBox 
+					Width="150"
+					Name="SortingComboBox" 
+					SelectionChanged="SortingComboBox_SelectionChanged"/>
+				<ComboBox 
+					Width="150"
+					SelectionChanged="FilteringComboBox_SelectionChanged"
+					Name="FilteringComboBox"/>
+			</StackPanel>
+		</Border>
+		<Border 
+			DockPanel.Dock="Bottom" 
+			Name="StatisticPanel">
+			<StackPanel
+				HorizontalAlignment="Center"
+				Orientation="Horizontal"
+				>
+				<TextBlock Name="StatisticTextBlock">Статистика</TextBlock>
+			</StackPanel>
+		</Border>
+		<Border Name="MainPanel">
+			<ListBox Name="ServiceListBox">
+				<ListBox.ItemTemplate>
+					<DataTemplate>
+						<StackPanel Orientation="Horizontal" Spacing="20">
+							<Image Source="{Binding ServiceImage}" Width="100" Height="100"/>
+							<StackPanel Orientation="Vertical">
+								<TextBlock Text="{Binding ServiceName}"/>
+								<StackPanel Orientation="Horizontal" Spacing="5">
+									<TextBlock Text="{Binding OldCost}" TextDecorations="Strikethrough"/>
+									<TextBlock Text="{Binding SeviceCostPerSeconds}" />
+								</StackPanel>
+								<TextBlock Text="{Binding ServiceDiscount}"/>
+							</StackPanel>
+						</StackPanel>
+					</DataTemplate>
+				</ListBox.ItemTemplate>
+			</ListBox>
+		</Border>
+	</DockPanel>
+</Window>

ServiceApp/ServiceWindow.axaml.cs

@@ -0,0 +1,132 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using System.Linq;
+using ServiceApp.EnityModels;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using SkiaSharp;
+using Microsoft.EntityFrameworkCore.Storage.Json;
+using System;
+using Npgsql.TypeMapping;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
+
+namespace ServiceApp;
+
+public partial class ServiceWindow : Window
+{
+    public List<ServicePresenter> sourceList { get; set; }
+    public ObservableCollection<ServicePresenter> displayList { get; }
+
+    private string _searchWord = string.Empty;
+
+    private string[] _sortingSource = new string[3] { "îòñóò.", "ïî âîçðàñò.", "ïî óáûâ." };
+    private Dictionary<string, (int, int)> _dicountFilter = new Dictionary<string, (int, int)> {
+        {"âñå", (0, 0) },
+        { "0-5", (0,5)},
+        { "15-30", (5,15)},
+        { "30-70", (30,70)},
+        { "70-100", (70,100)},
+    };
+
+    public ServiceWindow()
+    {
+        InitializeComponent();
+        using (var dbContext = new IsajkinContext())
+        {
+
+            sourceList = dbContext.Services.Select(service =>
+            new ServicePresenter
+            {
+                Title = service.Title,
+                Discount = service.Discount,
+                Durationinminutes = service.Durationinminutes,
+                Id = service.Id,
+                Cost = service.Cost,
+                Mainimagepath = service.Mainimagepath,
+            }
+            ).ToList();
+        }
+        displayList = new ObservableCollection<ServicePresenter>(sourceList);
+        SortingComboBox.ItemsSource = _sortingSource;
+        ServiceListBox.ItemsSource = displayList;
+        FilteringComboBox.ItemsSource = _dicountFilter.Keys;
+        StatisticTextBlock.Text = String.Format("{0} èç {1}", displayList.Count, sourceList.Count);
+
+    }
+
+    private void DisplayService() {
+
+        var displayServiceList = sourceList;
+        if (FilteringComboBox.SelectedIndex > 0) displayServiceList = displayServiceList.Where(service => 
+        FilterByDiscount(service, FilteringComboBox.SelectionBoxItem.ToString())).ToList();
+        if(!String.IsNullOrEmpty(_searchWord)) displayServiceList = displayServiceList.Where(service => SearchByWord(service, _searchWord)).ToList();
+        if(SortingComboBox.SelectedIndex > 0) displayServiceList = SortingComboBox.SelectedIndex == 1?
+                displayServiceList.OrderBy(service => service.Cost).ToList() :
+                displayServiceList.OrderByDescending(service => service.Cost).ToList();
+       displayList.Clear();
+       foreach (var service in displayServiceList) { displayList.Add(service); }
+        StatisticTextBlock.Text = String.Format("{0} èç {1}", displayServiceList.Count, sourceList.Count);
+    }
+
+
+    private bool SearchByWord(ServicePresenter service, string word) {
+        if (service.Title.Contains(word, StringComparison.CurrentCultureIgnoreCase)) return true;
+        if (String.IsNullOrEmpty(service.Description)) return false;
+        if (service.Description.Contains(word, StringComparison.CurrentCultureIgnoreCase)) return true;
+        return false;
+    }
+    private bool FilterByDiscount(ServicePresenter servicePresenter, string key) {
+        (int left, int right) = _dicountFilter[key];
+        double discount = servicePresenter.Discount != null? Convert.ToDouble(servicePresenter.Discount) * 100 : 0;
+        return left <= discount && discount < right;
+    }
+
+    private void SearchTextBox_TextChanged(object? sender, Avalonia.Controls.TextChangedEventArgs e)
+    {
+        _searchWord = SearchTextBox.Text.ToString();
+        DisplayService();
+    }
+
+
+    private void FilteringComboBox_SelectionChanged(object? sender, Avalonia.Controls.SelectionChangedEventArgs e)
+    {
+      DisplayService();
+    }
+
+    private void SortingComboBox_SelectionChanged(object? sender, Avalonia.Controls.SelectionChangedEventArgs e)
+    {
+        DisplayService();
+    }
+}
+
+public class ServicePresenter() : Service
+{
+    public int ServiceID { get => this.Id; }
+    public string ServiceName { get => this.Title; }
+    public string SeviceCostPerSeconds { get =>
+            (this.Discount != 0 ?
+            String.Format("{0:0.00} ðóáëåé çà {1} ìèíóò", this.Cost - this.Cost * Convert.ToDecimal(this.Discount), this.Durationinminutes)
+            :
+            String.Format("{0:0.00} ðóáëåé çà {1} ìèíóò", this.Cost, this.Durationinminutes)
+            ); 
+    }
+    public Bitmap ServiceImage { get => GetBitmap(this.Mainimagepath); }
+    public decimal? OldCost { get => (this.Discount != 0 ? this.Cost : null); }
+    public string? ServiceDiscount { get => 
+            (this.Discount != 0 ? 
+            String.Format("* ñêèäêà {0}%", Discount * 100)
+            : String.Empty
+            ); }
+
+    private Bitmap GetBitmap(string fileName) {
+        try {
+            return new Bitmap($"Assets\\{fileName}");
+        }
+        catch (Exception ex) {
+            return new Bitmap("Assets\\download.png");
+
+        }
+    }
+}

ServiceApp/ServiceWindowAdmin.axaml

@@ -0,0 +1,66 @@
+<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:CompileBindings="False"
+        x:Class="ServiceApp.ServiceAdminWindow"
+        Title="ServiceAdminWindow">
+	<DockPanel>
+		<Border 
+			DockPanel.Dock="Top" 
+			Name="SearchPanel">
+			<StackPanel
+				HorizontalAlignment="Center"
+				Orientation="Horizontal"
+				Spacing="20">
+				<TextBox 
+					Name="SearchTextBox"
+					Width="200"
+					TextChanged="SearchTextBox_TextChanged"
+					/>
+				<ComboBox 
+					Width="150"
+					Name="SortingComboBox" 
+					SelectionChanged="SortingComboBox_SelectionChanged"/>
+				<ComboBox 
+					Width="150"
+					SelectionChanged="FilteringComboBox_SelectionChanged"
+					Name="FilteringComboBox"/>
+			</StackPanel>
+		</Border>
+		<Border 
+			DockPanel.Dock="Bottom" 
+			Name="StatisticPanel">
+			<StackPanel
+				HorizontalAlignment="Center"
+				Orientation="Horizontal"
+				>
+				<TextBlock Name="StatisticTextBlock">Статистика</TextBlock>
+			</StackPanel>
+		</Border>
+		<Border Name="MainPanel">
+			<ListBox Name="ServiceListBox">
+				<ListBox.ItemTemplate>
+					<DataTemplate>
+						<StackPanel Orientation="Horizontal" Spacing="20">
+							<Image Source="{Binding ServiceImage}" Width="100" Height="100"/>
+							<StackPanel Orientation="Vertical">
+								<TextBlock Text="{Binding ServiceName}"/>
+								<StackPanel Orientation="Horizontal" Spacing="5">
+									<TextBlock Text="{Binding OldCost}" TextDecorations="Strikethrough"/>
+									<TextBlock Text="{Binding SeviceCostPerSeconds}" />
+								</StackPanel>
+								<TextBlock Text="{Binding ServiceDiscount}"/>
+								<StackPanel Orientation="Horizontal">
+									<Button Name="EditButton" Click="EditButton_Click" Tag="{Binding ServiceID}">Редактировать</Button>
+									<Button Name="RemoveButton" Click="RemoveButton_Click" Tag="{Binding ServiceID}">Удалить</Button>
+								</StackPanel>
+							</StackPanel>
+						</StackPanel>
+					</DataTemplate>
+				</ListBox.ItemTemplate>
+			</ListBox>
+		</Border>
+	</DockPanel>
+</Window>

ServiceApp/ServiceWindowAdmin.axaml.cs

@@ -0,0 +1,134 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using System.Linq;
+using ServiceApp.EnityModels;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using SkiaSharp;
+using Microsoft.EntityFrameworkCore.Storage.Json;
+using System;
+using Npgsql.TypeMapping;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
+
+namespace ServiceApp;
+
+public partial class ServiceAdminWindow : Window
+{
+    public List<ServicePresenter> sourceList { get; set; }
+    public ObservableCollection<ServicePresenter> displayList { get; }
+
+    private string _searchWord = string.Empty;
+
+    private string[] _sortingSource = new string[3] { "îòñóò.", "ïî âîçðàñò.", "ïî óáûâ." };
+    private Dictionary<string, (int, int)> _dicountFilter = new Dictionary<string, (int, int)> {
+        {"âñå", (0, 0) },
+        { "0-5", (0,5)},
+        { "15-30", (5,15)},
+        { "30-70", (30,70)},
+        { "70-100", (70,100)},
+    };
+
+    public ServiceAdminWindow()
+    {
+        InitializeComponent();
+        using (var dbContext = new IsajkinContext())
+        {
+
+            sourceList = dbContext.Services.Select(service =>
+            new ServicePresenter
+            {
+                Title = service.Title,
+                Discount = service.Discount,
+                Durationinminutes = service.Durationinminutes,
+                Id = service.Id,
+                Cost = service.Cost,
+                Mainimagepath = service.Mainimagepath,
+            }
+            ).ToList();
+        }
+        displayList = new ObservableCollection<ServicePresenter>(sourceList);
+        SortingComboBox.ItemsSource = _sortingSource;
+        ServiceListBox.ItemsSource = displayList;
+        FilteringComboBox.ItemsSource = _dicountFilter.Keys;
+        StatisticTextBlock.Text = String.Format("{0} èç {1}", displayList.Count, sourceList.Count);
+
+
+    }
+
+    private void DisplayService() {
+
+        var displayServiceList = sourceList;
+        if (FilteringComboBox.SelectedIndex > 0) displayServiceList = displayServiceList.Where(service => 
+        FilterByDiscount(service, FilteringComboBox.SelectionBoxItem.ToString())).ToList();
+        if(!String.IsNullOrEmpty(_searchWord)) displayServiceList = displayServiceList.Where(service => SearchByWord(service, _searchWord)).ToList();
+        if(SortingComboBox.SelectedIndex > 0) displayServiceList = SortingComboBox.SelectedIndex == 1?
+                displayServiceList.OrderBy(service => service.Cost).ToList() :
+                displayServiceList.OrderByDescending(service => service.Cost).ToList();
+       displayList.Clear();
+       foreach (var service in displayServiceList) { displayList.Add(service); }
+        StatisticTextBlock.Text = String.Format("{0} èç {1}", displayServiceList.Count, sourceList.Count);
+    }
+
+
+    private bool SearchByWord(ServicePresenter service, string word) {
+        if (service.Title.Contains(word, StringComparison.CurrentCultureIgnoreCase)) return true;
+        if (String.IsNullOrEmpty(service.Description)) return false;
+        if (service.Description.Contains(word, StringComparison.CurrentCultureIgnoreCase)) return true;
+        return false;
+    }
+    private bool FilterByDiscount(ServicePresenter servicePresenter, string key) {
+        (int left, int right) = _dicountFilter[key];
+        double discount = servicePresenter.Discount != null? Convert.ToDouble(servicePresenter.Discount) * 100 : 0;
+        return left <= discount && discount < right;
+    }
+
+    private void SearchTextBox_TextChanged(object? sender, Avalonia.Controls.TextChangedEventArgs e)
+    {
+        _searchWord = SearchTextBox.Text.ToString();
+        DisplayService();
+    }
+
+
+    private void FilteringComboBox_SelectionChanged(object? sender, Avalonia.Controls.SelectionChangedEventArgs e)
+    {
+      DisplayService();
+    }
+
+    private void SortingComboBox_SelectionChanged(object? sender, Avalonia.Controls.SelectionChangedEventArgs e)
+    {
+        DisplayService();
+    }
+
+    private void EditButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+
+    }
+
+    private void RemoveButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        var serviceID = Convert.ToInt32((sender as Button).Tag);
+        using (var dbContext = new IsajkinContext()) {
+            var service = dbContext.Services.First(service => service.Id == serviceID);
+            var serviceLocal = displayList.First(service => service.Id == serviceID);
+            if (service == null) return;
+            if (dbContext.Clientservices.Where(item => item.Serviceid == serviceID).Count() > 0) return;
+            using var transaction = dbContext.Database.BeginTransaction();
+            try
+            {
+                if (dbContext.Servicephotos.Where(item => item.Serviceid == serviceID).Count() > 0)
+                {
+                    dbContext.RemoveRange(dbContext.Servicephotos.Where(item => item.Serviceid == serviceID));
+                }
+                dbContext.Services.Remove(service);
+                displayList.Remove(serviceLocal);
+                dbContext.SaveChanges();
+                transaction.Commit();
+            }
+            catch (Exception ex) {
+               
+            }
+        } ;
+    }
+}

ServiceApp/app.manifest

@@ -0,0 +1,18 @@
+<?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="ServiceApp.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>