first

AddAgentWindow.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="demko_v.AddAgentWindow"
+        Title="AddAgentWindow">
+    <StackPanel Spacing="5" VerticalAlignment="Center" HorizontalAlignment="Center">
+        <TextBox Width="300" x:Name="TitleTextBox" Watermark="Наименование"/>
+        <TextBox Width="300" x:Name="AddressTextBox" Watermark="Адрес"/>
+        <TextBox Width="300" x:Name="InnTextBox" Watermark="ИНН"/>
+        <TextBox Width="300" x:Name="KppTextBox" Watermark="КПП"/>
+        <TextBox Width="300" x:Name="PriorityTextBox" Watermark="Приоритет"/>
+        <TextBox Width="300" x:Name="DirectorNameTextBox" Watermark="Имя директора"/>
+        <TextBox Width="300" x:Name="EmailTextBox" Watermark="Почта"/>
+        <TextBox Width="300" x:Name="PhoneNumberTextBox" Watermark="Номер телефона"/>
+        <ComboBox Width="300" x:Name="TypeAgentAddCombobox">
+            <ComboBoxItem Content="ООО"/>
+            <ComboBoxItem Content="МФО"/>
+            <ComboBoxItem Content="ЗАО"/>
+            <ComboBoxItem Content="МКК"/>
+            <ComboBoxItem Content="ПАО"/>
+            <ComboBoxItem Content="ОАО"/>
+        </ComboBox>
+        <Button Width="125" x:Name="SelectImageButton" Click="SelectImage" Content="Выбрать фото"/>
+        <Image Width="60" Height="60" x:Name="AgentImage"/>
+        <Button Width="125" x:Name="SaveButton" Content="Сохранить" Click="AddAgent_OnClick"/>
+    </StackPanel>
+</Window>

AddAgentWindow.axaml.cs

@@ -0,0 +1,98 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Media.Imaging;
+using System.Linq;
+using Avalonia.Platform.Storage;
+using demko_v.Models;
+
+namespace demko_v;
+
+public partial class AddAgentWindow : Window
+{
+    
+    public string PathToImage = string.Empty;
+    
+    public AddAgentWindow()
+    {
+        InitializeComponent();
+    }
+    
+    private async Task<Bitmap?> SelectAndSaveImage()
+    {
+        var showDialog = StorageProvider.OpenFilePickerAsync(
+            options: new Avalonia.Platform.Storage.FilePickerOpenOptions()
+            {
+                Title = "Select an image",
+                FileTypeFilter = new[] { FilePickerFileTypes.ImageAll }
+            });
+        var storageFile = await showDialog;
+        try
+        {
+            var bmp = new Bitmap(storageFile.First().TryGetLocalPath());
+            string shortGuid = Guid.NewGuid().ToString("N").Substring(0, 8);
+            string path = $"/Users/feitanportor/dev/C#/demko_v/demko_v/bin/Debug/net8.0/agents/{shortGuid}.jpg";
+            bmp.Save(path);
+            PathToImage = path;
+            return bmp;
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    public void AddAgent_OnClick(object? sender, RoutedEventArgs e)
+    {
+        using var ctx = new DemoAgentsContext();
+
+        if (string.IsNullOrWhiteSpace(TitleTextBox.Text) ||
+            string.IsNullOrWhiteSpace(AddressTextBox.Text) ||
+            string.IsNullOrWhiteSpace(InnTextBox.Text) ||
+            string.IsNullOrWhiteSpace(KppTextBox.Text) ||
+            string.IsNullOrWhiteSpace(PriorityTextBox.Text) ||
+            string.IsNullOrWhiteSpace(EmailTextBox.Text) ||
+            string.IsNullOrWhiteSpace(PhoneNumberTextBox.Text) ||
+            string.IsNullOrWhiteSpace(PathToImage))
+        {
+            return;
+        }
+
+        if (TypeAgentAddCombobox.SelectedItem is not ComboBoxItem selectedItem)
+            return;
+
+        string selectedType = selectedItem.Content.ToString();
+        
+        var agentType = ctx.AgentTypes.FirstOrDefault(at => at.Title == selectedType);
+        if (agentType is null)
+        {
+            return;
+        }
+
+        var newAgent = new Agent
+        {
+            Title = TitleTextBox.Text,
+            Address = AddressTextBox.Text,
+            Inn = InnTextBox.Text,
+            Kpp = KppTextBox.Text,
+            Priority = int.Parse(PriorityTextBox.Text),
+            Email = EmailTextBox.Text,
+            Phone = PhoneNumberTextBox.Text,
+            Logo = PathToImage,
+            DirectorName = DirectorNameTextBox.Text,
+            AgentTypeId = agentType.Id
+        };
+
+        ctx.Agents.Add(newAgent);
+        ctx.SaveChanges();
+
+        Close();
+    }
+
+    private async void SelectImage(object? sender, RoutedEventArgs e)
+    {
+        AgentImage.Source = await SelectAndSaveImage();
+    }
+}

App.axaml

@@ -0,0 +1,10 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="demko_v.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

@@ -0,0 +1,23 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace demko_v;
+
+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();
+    }
+}

EditAgentWindow.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="demko_v.EditAgentWindow"
+        Title="AddAgentWindow">
+    <StackPanel Spacing="5" VerticalAlignment="Center" HorizontalAlignment="Center">
+        <TextBox Width="300" x:Name="TitleTextBox" Watermark="Наименование"/>
+        <TextBox Width="300" x:Name="AddressTextBox" Watermark="Адрес"/>
+        <TextBox Width="300" x:Name="InnTextBox" Watermark="ИНН"/>
+        <TextBox Width="300" x:Name="KppTextBox" Watermark="КПП"/>
+        <TextBox Width="300" x:Name="PriorityTextBox" Watermark="Приоритет"/>
+        <TextBox Width="300" x:Name="DirectorNameTextBox" Watermark="Имя директора"/>
+        <TextBox Width="300" x:Name="EmailTextBox" Watermark="Почта"/>
+        <TextBox Width="300" x:Name="PhoneNumberTextBox" Watermark="Номер телефона"/>
+        <ComboBox Width="300" x:Name="TypeAgentAddCombobox" SelectionChanged="TypeAgentAddCombobox_OnSelectionChanged"/>
+        <Button Width="125" x:Name="SelectImageButton" Click="SelectImage" Content="Выбрать фото"/>
+        <Image Width="60" Height="60" x:Name="AgentImage"/>
+        <Button Width="125" x:Name="SaveButton" Content="Сохранить" Click="EditAgent_OnClick"/>
+    </StackPanel>
+</Window>

EditAgentWindow.axaml.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Media.Imaging;
+using System.Linq;
+using Avalonia.Platform.Storage;
+using demko_v.Models;
+
+namespace demko_v;
+
+public partial class EditAgentWindow : Window
+{
+    public string PathToImage = string.Empty;
+    public Agent agentPresenter;
+    public List<string> AgentTypesList { get; }
+    
+    public EditAgentWindow(Agent agentInput)
+    {
+        using var ctx = new DemoAgentsContext();
+        InitializeComponent();
+        agentPresenter = agentInput;
+        
+        AgentTypesList = ctx.AgentTypes.Select(a => a.Title).ToList();
+        TypeAgentAddCombobox.ItemsSource = AgentTypesList;
+        
+        Otrisovka();
+    }
+
+    private async void EditAgent_OnClick(object? sender, RoutedEventArgs e)
+    {
+        using var ctx = new DemoAgentsContext();
+
+        if (string.IsNullOrWhiteSpace(TitleTextBox.Text)) return;
+        agentPresenter.Title = TitleTextBox.Text;
+
+        if (!int.TryParse(PriorityTextBox.Text, out int priority)) return;
+        agentPresenter.Priority = priority;
+
+        if (string.IsNullOrWhiteSpace(AddressTextBox.Text)) return;
+        agentPresenter.Address = AddressTextBox.Text;
+
+        if (string.IsNullOrWhiteSpace(InnTextBox.Text)) return;
+        agentPresenter.Inn = InnTextBox.Text;
+
+        if (string.IsNullOrWhiteSpace(KppTextBox.Text)) return;
+        agentPresenter.Kpp = KppTextBox.Text;
+
+        if (string.IsNullOrWhiteSpace(DirectorNameTextBox.Text)) return;
+        agentPresenter.DirectorName = DirectorNameTextBox.Text;
+
+        if (string.IsNullOrWhiteSpace(PhoneNumberTextBox.Text)) return;
+        agentPresenter.Phone = PhoneNumberTextBox.Text;
+
+        if (string.IsNullOrWhiteSpace(EmailTextBox.Text)) return;
+        agentPresenter.Email = EmailTextBox.Text;
+
+        if (TypeAgentAddCombobox.SelectedItem is AgentType selectedAgentType)
+        {
+            agentPresenter.AgentTypeId = selectedAgentType.Id;
+        }
+
+        if (!string.IsNullOrEmpty(PathToImage))
+        {
+            agentPresenter.Logo = PathToImage;
+        }
+
+        ctx.Agents.Update(agentPresenter);
+        await ctx.SaveChangesAsync();
+        Close(agentPresenter);
+    }
+
+    private async Task<Bitmap?> SelectAndSaveImage()
+    {
+        var showDialog = StorageProvider.OpenFilePickerAsync(
+            options: new Avalonia.Platform.Storage.FilePickerOpenOptions()
+            {
+                Title = "Select an image",
+                FileTypeFilter = new[] { FilePickerFileTypes.ImageAll }
+            });
+        var storageFile = await showDialog;
+        try
+        {
+            var bmp = new Bitmap(storageFile.First().TryGetLocalPath());
+            string shortGuid = Guid.NewGuid().ToString("N").Substring(0, 8);
+            string path = $"/Users/feitanportor/dev/C#/demko_v/demko_v/bin/Debug/net8.0/agents/{shortGuid}.jpg";
+            bmp.Save(path);
+            PathToImage = $"agents/{shortGuid}.jpg";
+            return bmp;
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    private async void SelectImage(object? sender, RoutedEventArgs e)
+    {
+        AgentImage.Source = await SelectAndSaveImage();
+    }
+    
+    private void TypeAgentAddCombobox_OnSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        using var ctx = new DemoAgentsContext();
+        
+        if (TypeAgentAddCombobox.SelectedItem is string selectedTitle)
+        {
+            var agentType = ctx.AgentTypes.FirstOrDefault(t => t.Title == selectedTitle);
+            if (agentType != null)
+            {
+                agentPresenter.AgentTypeId = agentType.Id;
+            }
+        }
+    }
+
+    private void Otrisovka()
+    {
+        using var ctx = new DemoAgentsContext();
+        
+        TitleTextBox.Text = agentPresenter.Title;
+        PriorityTextBox.Text = agentPresenter.Priority.ToString();
+        AddressTextBox.Text = agentPresenter.Address;
+        InnTextBox.Text = agentPresenter.Inn;
+        KppTextBox.Text = agentPresenter.Kpp;
+        DirectorNameTextBox.Text = agentPresenter.DirectorName;
+        PhoneNumberTextBox.Text = agentPresenter.Phone;
+        EmailTextBox.Text = agentPresenter.Email;
+        
+        if (!string.IsNullOrEmpty(agentPresenter.Logo))
+        {
+            string imagePath = Path.Combine(Environment.CurrentDirectory, agentPresenter.Logo);
+            
+            if (File.Exists(imagePath))
+            {
+                var bitmap = new Bitmap(imagePath);
+                AgentImage.Source = bitmap;
+                PathToImage = agentPresenter.Logo;
+            }
+        }
+        
+        if (agentPresenter.AgentTypeId != 0)
+        {
+            var selectedType = ctx.AgentTypes.FirstOrDefault(t => t.Id == agentPresenter.AgentTypeId)?.Title;
+            if (selectedType != null)
+            {
+                TypeAgentAddCombobox.SelectedItem = selectedType;
+            }
+        }
+    }
+}

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="demko_v.MainWindow"
+        x:CompileBindings="False"
+        Title="demko_agents">
+    <DockPanel>
+            <StackPanel
+                HorizontalAlignment="Center"
+                Orientation="Horizontal"
+                DockPanel.Dock="Top"
+                Spacing="10"
+                Height="50">
+                <TextBox Width="200" x:Name="SearchTextBox" TextChanging="SearchTextBox_OnTextChanging" Watermark="Поиск"/>
+                <TextBlock VerticalAlignment="Center" Text="Имя:"/>
+                <ComboBox VerticalAlignment="Center" Width="100" x:Name="TitleAgentSortComboBox" SelectionChanged="TitleAgentSortComboBox_OnSelectionChanged">
+                    <ComboBoxItem Content="Дефолт"/>
+                    <ComboBoxItem Content="А - я"/>
+                    <ComboBoxItem Content="Я - а"/>
+                </ComboBox>
+                <TextBlock VerticalAlignment="Center" Text="Скидка:"/>
+                <ComboBox VerticalAlignment="Center" Width="100" x:Name="SaleSortComboBox" SelectionChanged="SaleSortComboBox_OnSelectionChanged">
+                    <ComboBoxItem Content="Дефолт"/>
+                    <ComboBoxItem Content="Убывание"/>
+                    <ComboBoxItem Content="Возрастание"/>
+                </ComboBox>
+                <TextBlock VerticalAlignment="Center" Text="Приоритет:"/>
+                <ComboBox VerticalAlignment="Center" Width="100" x:Name="PrioritySortCombobox" SelectionChanged="PrioritySortCombobox_OnSelectionChanged">
+                    <ComboBoxItem Content="Дефолт"/>
+                    <ComboBoxItem Content="Убывание"/>
+                    <ComboBoxItem Content="Возрастание"/>
+                </ComboBox>
+                <TextBlock VerticalAlignment="Center" Text="Тип агента:"/>
+                <ComboBox VerticalAlignment="Center" Width="100" x:Name="TypeAgentSortCombobox" SelectionChanged="TypeAgentSortCombobox_OnSelectionChanged">
+                    <ComboBoxItem Content="Все"/>
+                    <ComboBoxItem Content="ООО"/>
+                    <ComboBoxItem Content="МФО"/>
+                    <ComboBoxItem Content="ЗАО"/>
+                    <ComboBoxItem Content="МКК"/>
+                    <ComboBoxItem Content="ПАО"/>
+                    <ComboBoxItem Content="ОАО"/>
+                </ComboBox>
+                <Button HorizontalContentAlignment="Right" VerticalContentAlignment="Center" x:Name="AddAgent" Click="AddAgent_OnClick" Content="Добавить агента"/>
+            </StackPanel>
+            <StackPanel
+                Spacing="10"
+                HorizontalAlignment="Center"
+                Orientation="Horizontal"
+                DockPanel.Dock="Bottom" Height="40">
+                <Button HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Width="70" x:Name="BackButton" Click="Back_OnClick" Content="Назад"/>
+                <TextBlock VerticalAlignment="Center" x:Name="CountAgentsTextBlock"/>
+                <Button HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Width="70" x:Name="NextButton" Click="Next_OnClick" Content="Вперед"/>
+            </StackPanel>
+            <Border>
+                <ListBox x:Name="AgentListBox">
+                    <ListBox.ItemTemplate>
+                        <DataTemplate>
+                            <Border BorderBrush="Gray" BorderThickness="1" Padding="10" CornerRadius="5">
+                                <Grid ColumnDefinitions="120, *" Margin="5" HorizontalAlignment="Center">
+                                    <Image Grid.Column="0" Width="100" Height="100"
+                                           Source="{Binding Image}"
+                                           Stretch="UniformToFill"
+                                           VerticalAlignment="Center"
+                                           HorizontalAlignment="Left"
+                                           Margin="5"/>
+
+                                    <StackPanel Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Spacing="5">
+                                        <TextBlock Text="{Binding Title}" FontSize="18" FontWeight="Bold"/>
+                                        <TextBlock Text="{Binding SalesYear}" FontWeight="Bold"/>
+                                        <TextBlock Text="{Binding SalesQuantity}"/>
+                                        <TextBlock Text="{Binding CountSales}"/>
+                                        <TextBlock Text="{Binding Sale}"/>
+                                        <TextBlock Text="{Binding Phone}"/>
+                                        <TextBlock Text="{Binding AgentType}"/>
+                                        <TextBlock Text="{Binding Priority}"/>
+                                    </StackPanel>
+                                </Grid>
+                                <Border.ContextMenu>
+                                    <ContextMenu>
+                                        <MenuItem Header="edit" Click="EditMenuItem_OnClick"/>
+                                        <MenuItem Header="priority" Click="PriorityMenuItem_OnClick"/>
+                                    </ContextMenu>
+                                </Border.ContextMenu>
+                            </Border>
+                        </DataTemplate>
+                    </ListBox.ItemTemplate>
+                </ListBox>
+            </Border>
+        </DockPanel>
+</Window>

MainWindow.axaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.IO;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Markup.Xaml;
+using Avalonia.Media.Imaging;
+using Microsoft.EntityFrameworkCore;
+using demko_v.Models;
+
+namespace demko_v;
+
+public partial class MainWindow : Window
+{
+    
+    ObservableCollection<AgentPresenter> agents = new ObservableCollection<AgentPresenter>();
+    List<AgentPresenter> dataSourceAgents;
+    
+    private const int ItemsPerPage = 10;
+    private int currentPage = 1;
+    
+    public MainWindow()
+    {
+        InitializeComponent();
+        LoadData();
+        
+        TitleAgentSortComboBox.SelectedIndex = 0;
+        SaleSortComboBox.SelectedIndex = 0;
+        PrioritySortCombobox.SelectedIndex = 0;
+        TypeAgentSortCombobox.SelectedIndex = 0;
+
+        DisplayAgents();
+    }
+    
+    private void LoadData()
+    {
+        using var ctx = new DemoAgentsContext();
+        
+        dataSourceAgents = ctx.Agents
+            .Include(a => a.ProductSales)
+            .ThenInclude(ps => ps.Product)
+            .Select(agent => new AgentPresenter
+            {
+                Id = agent.Id,
+                Title = agent.Title,
+                Phone = "+" + agent.Phone,
+                AgentType = agent.AgentType.Title,
+                Priority = agent.Priority,
+                SalesYear = agent.ProductSales.Any() ? agent.ProductSales.Max(ps => ps.SaleDate.Year) : 0,
+                SalesQuantity = agent.ProductSales.Sum(ps => ps.ProductCount * (int)ps.Product.MinCostForAgent),
+                CountSales = agent.ProductSales.Sum(ps => ps.ProductCount),
+                Sale = agent.ProductSales.Any() ? CalculateSale(agent.ProductSales.Sum(ps => ps.Product.MinCostForAgent * ps.ProductCount)) + "%" : "0%",
+                Logo = agent.Logo
+            }).ToList();
+    }
+
+    public void DisplayAgents()
+    {
+        LoadData();
+        var temp = dataSourceAgents;
+        
+        agents.Clear();
+
+        switch (TitleAgentSortComboBox.SelectedIndex)
+        {
+            case 0: break;
+            case 1: temp = temp.OrderBy(a => a.Title).ToList(); break;
+            case 2: temp = temp.OrderByDescending(a => a.Title).ToList(); break;
+        }
+
+        switch (SaleSortComboBox.SelectedIndex)
+        {
+            case 0: break;
+            case 1: temp = temp.OrderByDescending(a => int.Parse(a.Sale.Replace("%", ""))).ToList(); break;
+            case 2: temp = temp.OrderBy(a => int.Parse(a.Sale.Replace("%", ""))).ToList(); break;
+        }
+
+        switch (PrioritySortCombobox.SelectedIndex)
+        {
+            case 0: break;
+            case 1: temp = temp.OrderByDescending(a => a.Priority).ToList(); break;
+            case 2: temp = temp.OrderBy(a => a.Priority).ToList(); break;
+        }
+
+        switch (TypeAgentSortCombobox.SelectedIndex)
+        {
+            case 0: break;
+            case 1: temp = temp.Where(a => a.AgentType == "ООО").ToList(); break;
+            case 2: temp = temp.Where(a => a.AgentType == "МФО").ToList(); break;
+            case 3: temp = temp.Where(a => a.AgentType == "ЗАО").ToList(); break;
+            case 4: temp = temp.Where(a => a.AgentType == "МКК").ToList(); break;
+            case 5: temp = temp.Where(a => a.AgentType == "ПАО").ToList(); break;
+            case 6: temp = temp.Where(a => a.AgentType == "ОАО").ToList(); break;
+        }
+        
+        if (!string.IsNullOrEmpty(SearchTextBox.Text))
+        {
+            var search = SearchTextBox.Text;
+            temp = temp.Where(a => IsContains(a.Title, a.Phone, search)).ToList();
+        }
+
+        foreach (var item in temp)
+        {
+            agents.Add(item);
+        }
+
+        currentPage = 0; 
+        UpdateListBox();
+    }
+
+    public class AgentPresenter : Agent
+    {
+        Bitmap? Image
+        {
+            get
+            {
+                try
+                {
+                    string absolutePath = Path.Combine(AppContext.BaseDirectory, Logo);
+                    return new Bitmap(absolutePath);
+                }
+                catch
+                {
+                    return null;
+                }
+            }
+        }
+        
+        public int SalesYear { get; set; }
+        public int? SalesQuantity { get; set; }
+        public string? Sale { get; set; }
+        public string? AgentType { get; set; }
+        public int CountSales { get; set; }
+    }
+    
+    
+    public void UpdateListBox()
+    {
+        var pagedAgents = agents.Skip(currentPage * ItemsPerPage).Take(ItemsPerPage).ToList();
+        AgentListBox.ItemsSource = pagedAgents;
+        
+        CountAgentsTextBlock.Text = $"{currentPage + 1} / {Math.Ceiling((double)agents.Count / ItemsPerPage)}";
+        
+        BackButton.IsEnabled = currentPage > 0;
+        NextButton.IsEnabled = (currentPage + 1) * ItemsPerPage < agents.Count;
+        
+    }
+    
+    public void Back_OnClick(object? sender, RoutedEventArgs e)
+    {
+        if (currentPage > 0)
+        {
+            currentPage--;
+            UpdateListBox();
+        }
+    }
+
+    public void Next_OnClick(object? sender, RoutedEventArgs e)
+    {
+        if ((currentPage + 1) * ItemsPerPage < agents.Count)
+        {
+            currentPage++;
+            UpdateListBox();
+        }
+    }
+    
+    public bool IsContains(string title, string phone, string search)
+    {
+        string message = (title + phone).ToLower();
+        search = search.ToLower();
+        return message.Contains(search);
+    }
+    
+    private static int CalculateSale(decimal totalSales)
+    {
+        if (totalSales < 10000) return 0;
+        if (totalSales < 50000) return 5;
+        if (totalSales < 150000) return 10;
+        if (totalSales < 500000) return 20;
+        return 25;
+    }
+    
+    public void SearchTextBox_OnTextChanging(object? sender, RoutedEventArgs e)
+    {
+        DisplayAgents();
+    }
+    
+    
+    public void TitleAgentSortComboBox_OnSelectionChanged(object? sender, RoutedEventArgs e)
+    {
+        DisplayAgents();
+    }
+    
+    
+    public void SaleSortComboBox_OnSelectionChanged(object? sender, RoutedEventArgs e)
+    {
+        DisplayAgents();
+    }
+    
+    
+    public void PrioritySortCombobox_OnSelectionChanged(object? sender, RoutedEventArgs e)
+    {
+        DisplayAgents();
+    }
+    
+    
+    public void TypeAgentSortCombobox_OnSelectionChanged(object? sender, RoutedEventArgs e)
+    {
+        DisplayAgents();
+    }
+    
+    public void AddAgent_OnClick(object? sender, RoutedEventArgs e)
+    {
+        AddAgentWindow attendanceButton = new AddAgentWindow();
+        attendanceButton.ShowDialog(this); ;
+    }
+    
+    private async void EditMenuItem_OnClick(object? sender, RoutedEventArgs e)
+    {
+        using var ctx = new DemoAgentsContext();
+        if (AgentListBox.SelectedItem is AgentPresenter selectedAgentPresenter)
+        {
+            var agent = ctx.Agents.FirstOrDefault(a => a.Id == selectedAgentPresenter.Id);
+            EditAgentWindow editAgentWindow = new EditAgentWindow(agent);
+            var updatedAgent = await editAgentWindow.ShowDialog<Agent>(this);
+        }
+    
+        DisplayAgents();
+    }
+
+    private async void PriorityMenuItem_OnClick(object? sender, RoutedEventArgs e)
+    {
+        if (AgentListBox.SelectedItem is AgentPresenter selectedAgentPresenter)
+        {
+            PriorityWindow priorityWindow = new PriorityWindow(selectedAgentPresenter.Id);
+            await priorityWindow.ShowDialog(this);
+        }
+        
+        DisplayAgents();
+    }
+}

Models/Agent.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class Agent
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public int AgentTypeId { get; set; }
+
+    public string? Address { get; set; }
+
+    public string Inn { get; set; } = null!;
+
+    public string? Kpp { get; set; }
+
+    public string? DirectorName { get; set; }
+
+    public string Phone { get; set; } = null!;
+
+    public string? Email { get; set; }
+
+    public string? Logo { get; set; }
+
+    public int Priority { get; set; }
+
+    public virtual AgentType AgentType { get; set; } = null!;
+
+    public virtual ICollection<ProductSale> ProductSales { get; set; } = new List<ProductSale>();
+}

Models/AgentPriorityHistory.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class AgentPriorityHistory
+{
+    public int Id { get; set; }
+
+    public int AgentId { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+
+    public int PriorityValue { get; set; }
+}

Models/AgentType.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class AgentType
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public string? Image { get; set; }
+
+    public string? ТипАгента { get; set; }
+
+    public virtual ICollection<Agent> Agents { get; set; } = new List<Agent>();
+}

Models/DatabaseContext.cs

@@ -0,0 +1,282 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+
+namespace demko_v.Models;
+
+public partial class DatabaseContext : DbContext
+{
+    public DatabaseContext()
+    {
+    }
+
+    public DatabaseContext(DbContextOptions<DatabaseContext> options)
+        : base(options)
+    {
+    }
+
+    public virtual DbSet<Agent> Agents { get; set; }
+
+    public virtual DbSet<AgentPriorityHistory> AgentPriorityHistories { get; set; }
+
+    public virtual DbSet<AgentType> AgentTypes { get; set; }
+
+    public virtual DbSet<Material> Materials { get; set; }
+
+    public virtual DbSet<MaterialCountHistory> MaterialCountHistories { get; set; }
+
+    public virtual DbSet<MaterialType> MaterialTypes { get; set; }
+
+    public virtual DbSet<Product> Products { get; set; }
+
+    public virtual DbSet<ProductCostHistory> ProductCostHistories { get; set; }
+
+    public virtual DbSet<ProductMaterial> ProductMaterials { get; set; }
+
+    public virtual DbSet<ProductSale> ProductSales { get; set; }
+
+    public virtual DbSet<ProductType> ProductTypes { get; set; }
+
+    public virtual DbSet<Shop> Shops { get; set; }
+
+    public virtual DbSet<Supplier> Suppliers { 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=localhost;Database=demo_agents;Username=demo_agents;Password=demo_agents;Port=5445");
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Agent>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Agent_pkey");
+
+            entity.ToTable("Agent");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Address).HasMaxLength(300);
+            entity.Property(e => e.AgentTypeId).HasColumnName("AgentTypeID");
+            entity.Property(e => e.DirectorName).HasMaxLength(100);
+            entity.Property(e => e.Email).HasMaxLength(255);
+            entity.Property(e => e.Inn)
+                .HasMaxLength(12)
+                .HasColumnName("INN");
+            entity.Property(e => e.Kpp)
+                .HasMaxLength(9)
+                .HasColumnName("KPP");
+            entity.Property(e => e.Logo).HasMaxLength(100);
+            entity.Property(e => e.Phone).HasMaxLength(20);
+            entity.Property(e => e.Title).HasMaxLength(150);
+
+            entity.HasOne(d => d.AgentType).WithMany(p => p.Agents)
+                .HasForeignKey(d => d.AgentTypeId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("Agent_AgentTypeID_fkey");
+        });
+
+        modelBuilder.Entity<AgentPriorityHistory>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("AgentPriorityHistory_pkey");
+
+            entity.ToTable("AgentPriorityHistory");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.AgentId).HasColumnName("AgentID");
+            entity.Property(e => e.ChangeDate).HasColumnType("timestamp without time zone");
+        });
+
+        modelBuilder.Entity<AgentType>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("AgentType_pkey");
+
+            entity.ToTable("AgentType");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Image).HasMaxLength(100);
+            entity.Property(e => e.Title).HasMaxLength(50);
+            entity.Property(e => e.ТипАгента)
+                .HasMaxLength(50)
+                .HasColumnName("Тип агента");
+        });
+
+        modelBuilder.Entity<Material>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Material_pkey");
+
+            entity.ToTable("Material");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Cost).HasPrecision(10, 2);
+            entity.Property(e => e.Image).HasMaxLength(100);
+            entity.Property(e => e.MaterialTypeId).HasColumnName("MaterialTypeID");
+            entity.Property(e => e.Title).HasMaxLength(100);
+            entity.Property(e => e.Unit).HasMaxLength(10);
+
+            entity.HasOne(d => d.MaterialType).WithMany(p => p.Materials)
+                .HasForeignKey(d => d.MaterialTypeId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("Material_MaterialTypeID_fkey");
+
+            entity.HasMany(d => d.Suppliers).WithMany(p => p.Materials)
+                .UsingEntity<Dictionary<string, object>>(
+                    "MaterialSupplier",
+                    r => r.HasOne<Supplier>().WithMany()
+                        .HasForeignKey("SupplierId")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("MaterialSupplier_SupplierID_fkey"),
+                    l => l.HasOne<Material>().WithMany()
+                        .HasForeignKey("MaterialId")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("MaterialSupplier_MaterialID_fkey"),
+                    j =>
+                    {
+                        j.HasKey("MaterialId", "SupplierId").HasName("MaterialSupplier_pkey");
+                        j.ToTable("MaterialSupplier");
+                        j.IndexerProperty<int>("MaterialId").HasColumnName("MaterialID");
+                        j.IndexerProperty<int>("SupplierId").HasColumnName("SupplierID");
+                    });
+        });
+
+        modelBuilder.Entity<MaterialCountHistory>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("MaterialCountHistory_pkey");
+
+            entity.ToTable("MaterialCountHistory");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.ChangeDate).HasColumnType("timestamp without time zone");
+            entity.Property(e => e.MaterialId).HasColumnName("MaterialID");
+
+            entity.HasOne(d => d.Material).WithMany(p => p.MaterialCountHistories)
+                .HasForeignKey(d => d.MaterialId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("MaterialCountHistory_MaterialID_fkey");
+        });
+
+        modelBuilder.Entity<MaterialType>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("MaterialType_pkey");
+
+            entity.ToTable("MaterialType");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Title).HasMaxLength(50);
+        });
+
+        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.ArticleNumber).HasMaxLength(10);
+            entity.Property(e => e.Image).HasMaxLength(100);
+            entity.Property(e => e.MinCostForAgent).HasPrecision(10, 2);
+            entity.Property(e => e.ProductTypeId).HasColumnName("ProductTypeID");
+            entity.Property(e => e.Title).HasMaxLength(100);
+
+            entity.HasOne(d => d.ProductType).WithMany(p => p.Products)
+                .HasForeignKey(d => d.ProductTypeId)
+                .HasConstraintName("Product_ProductTypeID_fkey");
+        });
+
+        modelBuilder.Entity<ProductCostHistory>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("ProductCostHistory_pkey");
+
+            entity.ToTable("ProductCostHistory");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.ChangeDate).HasColumnType("timestamp without time zone");
+            entity.Property(e => e.CostValue).HasPrecision(10, 2);
+            entity.Property(e => e.ProductId).HasColumnName("ProductID");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.ProductCostHistories)
+                .HasForeignKey(d => d.ProductId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductCostHistory_ProductID_fkey");
+        });
+
+        modelBuilder.Entity<ProductMaterial>(entity =>
+        {
+            entity.HasKey(e => new { e.ProductId, e.MaterialId }).HasName("ProductMaterial_pkey");
+
+            entity.ToTable("ProductMaterial");
+
+            entity.Property(e => e.ProductId).HasColumnName("ProductID");
+            entity.Property(e => e.MaterialId).HasColumnName("MaterialID");
+
+            entity.HasOne(d => d.Material).WithMany(p => p.ProductMaterials)
+                .HasForeignKey(d => d.MaterialId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductMaterial_MaterialID_fkey");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.ProductMaterials)
+                .HasForeignKey(d => d.ProductId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductMaterial_ProductID_fkey");
+        });
+
+        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.AgentId).HasColumnName("AgentID");
+            entity.Property(e => e.ProductId).HasColumnName("ProductID");
+
+            entity.HasOne(d => d.Agent).WithMany(p => p.ProductSales)
+                .HasForeignKey(d => d.AgentId)
+                .HasConstraintName("fk_productsale_agent");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.ProductSales)
+                .HasForeignKey(d => d.ProductId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductSale_ProductID_fkey");
+        });
+
+        modelBuilder.Entity<ProductType>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("ProductType_pkey");
+
+            entity.ToTable("ProductType");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Percent).HasColumnName("percent");
+            entity.Property(e => e.Title).HasMaxLength(50);
+        });
+
+        modelBuilder.Entity<Shop>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Shop_pkey");
+
+            entity.ToTable("Shop");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Address).HasMaxLength(300);
+            entity.Property(e => e.AgentId).HasColumnName("AgentID");
+            entity.Property(e => e.Title).HasMaxLength(150);
+        });
+
+        modelBuilder.Entity<Supplier>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Supplier_pkey");
+
+            entity.ToTable("Supplier");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Inn)
+                .HasMaxLength(12)
+                .HasColumnName("INN");
+            entity.Property(e => e.SupplierType).HasMaxLength(20);
+            entity.Property(e => e.Title).HasMaxLength(150);
+        });
+
+        OnModelCreatingPartial(modelBuilder);
+    }
+
+    partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
+}

Models/DemoAgentsContext.cs

@@ -0,0 +1,278 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+
+namespace demko_v.Models;
+
+public partial class DemoAgentsContext : DbContext
+{
+    public DemoAgentsContext()
+    {
+    }
+
+    public DemoAgentsContext(DbContextOptions<DemoAgentsContext> options)
+        : base(options)
+    {
+    }
+
+    public virtual DbSet<Agent> Agents { get; set; }
+
+    public virtual DbSet<AgentPriorityHistory> AgentPriorityHistories { get; set; }
+
+    public virtual DbSet<AgentType> AgentTypes { get; set; }
+
+    public virtual DbSet<Material> Materials { get; set; }
+
+    public virtual DbSet<MaterialCountHistory> MaterialCountHistories { get; set; }
+
+    public virtual DbSet<MaterialType> MaterialTypes { get; set; }
+
+    public virtual DbSet<Product> Products { get; set; }
+
+    public virtual DbSet<ProductCostHistory> ProductCostHistories { get; set; }
+
+    public virtual DbSet<ProductMaterial> ProductMaterials { get; set; }
+
+    public virtual DbSet<ProductSale> ProductSales { get; set; }
+
+    public virtual DbSet<ProductType> ProductTypes { get; set; }
+
+    public virtual DbSet<Shop> Shops { get; set; }
+
+    public virtual DbSet<Supplier> Suppliers { 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=localhost;Database=demo_agents;Username=demo_agents;Password=demo_agents;Port=5445");
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Agent>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Agent_pkey");
+
+            entity.ToTable("Agent");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Address).HasMaxLength(300);
+            entity.Property(e => e.AgentTypeId).HasColumnName("AgentTypeID");
+            entity.Property(e => e.DirectorName).HasMaxLength(100);
+            entity.Property(e => e.Email).HasMaxLength(255);
+            entity.Property(e => e.Inn)
+                .HasMaxLength(12)
+                .HasColumnName("INN");
+            entity.Property(e => e.Kpp)
+                .HasMaxLength(9)
+                .HasColumnName("KPP");
+            entity.Property(e => e.Logo).HasMaxLength(100);
+            entity.Property(e => e.Phone).HasMaxLength(20);
+            entity.Property(e => e.Title).HasMaxLength(150);
+
+            entity.HasOne(d => d.AgentType).WithMany(p => p.Agents)
+                .HasForeignKey(d => d.AgentTypeId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("Agent_AgentTypeID_fkey");
+        });
+
+        modelBuilder.Entity<AgentPriorityHistory>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("AgentPriorityHistory_pkey");
+
+            entity.ToTable("AgentPriorityHistory");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.AgentId).HasColumnName("AgentID");
+            entity.Property(e => e.ChangeDate).HasColumnType("timestamp without time zone");
+        });
+
+        modelBuilder.Entity<AgentType>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("AgentType_pkey");
+
+            entity.ToTable("AgentType");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Image).HasMaxLength(100);
+            entity.Property(e => e.Title).HasMaxLength(50);
+            entity.Property(e => e.ТипАгента)
+                .HasMaxLength(50)
+                .HasColumnName("Тип агента");
+        });
+
+        modelBuilder.Entity<Material>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Material_pkey");
+
+            entity.ToTable("Material");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Cost).HasPrecision(10, 2);
+            entity.Property(e => e.Image).HasMaxLength(100);
+            entity.Property(e => e.MaterialTypeId).HasColumnName("MaterialTypeID");
+            entity.Property(e => e.Title).HasMaxLength(100);
+            entity.Property(e => e.Unit).HasMaxLength(10);
+
+            entity.HasOne(d => d.MaterialType).WithMany(p => p.Materials)
+                .HasForeignKey(d => d.MaterialTypeId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("Material_MaterialTypeID_fkey");
+
+            entity.HasMany(d => d.Suppliers).WithMany(p => p.Materials)
+                .UsingEntity<Dictionary<string, object>>(
+                    "MaterialSupplier",
+                    r => r.HasOne<Supplier>().WithMany()
+                        .HasForeignKey("SupplierId")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("MaterialSupplier_SupplierID_fkey"),
+                    l => l.HasOne<Material>().WithMany()
+                        .HasForeignKey("MaterialId")
+                        .OnDelete(DeleteBehavior.ClientSetNull)
+                        .HasConstraintName("MaterialSupplier_MaterialID_fkey"),
+                    j =>
+                    {
+                        j.HasKey("MaterialId", "SupplierId").HasName("MaterialSupplier_pkey");
+                        j.ToTable("MaterialSupplier");
+                        j.IndexerProperty<int>("MaterialId").HasColumnName("MaterialID");
+                        j.IndexerProperty<int>("SupplierId").HasColumnName("SupplierID");
+                    });
+        });
+
+        modelBuilder.Entity<MaterialCountHistory>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("MaterialCountHistory_pkey");
+
+            entity.ToTable("MaterialCountHistory");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.ChangeDate).HasColumnType("timestamp without time zone");
+            entity.Property(e => e.MaterialId).HasColumnName("MaterialID");
+
+            entity.HasOne(d => d.Material).WithMany(p => p.MaterialCountHistories)
+                .HasForeignKey(d => d.MaterialId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("MaterialCountHistory_MaterialID_fkey");
+        });
+
+        modelBuilder.Entity<MaterialType>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("MaterialType_pkey");
+
+            entity.ToTable("MaterialType");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Title).HasMaxLength(50);
+        });
+
+        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.ArticleNumber).HasMaxLength(10);
+            entity.Property(e => e.Image).HasMaxLength(100);
+            entity.Property(e => e.MinCostForAgent).HasPrecision(10, 2);
+            entity.Property(e => e.ProductTypeId).HasColumnName("ProductTypeID");
+            entity.Property(e => e.Title).HasMaxLength(100);
+
+            entity.HasOne(d => d.ProductType).WithMany(p => p.Products)
+                .HasForeignKey(d => d.ProductTypeId)
+                .HasConstraintName("Product_ProductTypeID_fkey");
+        });
+
+        modelBuilder.Entity<ProductCostHistory>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("ProductCostHistory_pkey");
+
+            entity.ToTable("ProductCostHistory");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.ChangeDate).HasColumnType("timestamp without time zone");
+            entity.Property(e => e.CostValue).HasPrecision(10, 2);
+            entity.Property(e => e.ProductId).HasColumnName("ProductID");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.ProductCostHistories)
+                .HasForeignKey(d => d.ProductId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductCostHistory_ProductID_fkey");
+        });
+
+        modelBuilder.Entity<ProductMaterial>(entity =>
+        {
+            entity.HasKey(e => new { e.ProductId, e.MaterialId }).HasName("ProductMaterial_pkey");
+
+            entity.ToTable("ProductMaterial");
+
+            entity.Property(e => e.ProductId).HasColumnName("ProductID");
+            entity.Property(e => e.MaterialId).HasColumnName("MaterialID");
+
+            entity.HasOne(d => d.Material).WithMany(p => p.ProductMaterials)
+                .HasForeignKey(d => d.MaterialId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductMaterial_MaterialID_fkey");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.ProductMaterials)
+                .HasForeignKey(d => d.ProductId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductMaterial_ProductID_fkey");
+        });
+
+        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.AgentId).HasColumnName("AgentID");
+            entity.Property(e => e.ProductId).HasColumnName("ProductID");
+
+            entity.HasOne(d => d.Product).WithMany(p => p.ProductSales)
+                .HasForeignKey(d => d.ProductId)
+                .OnDelete(DeleteBehavior.ClientSetNull)
+                .HasConstraintName("ProductSale_ProductID_fkey");
+        });
+
+        modelBuilder.Entity<ProductType>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("ProductType_pkey");
+
+            entity.ToTable("ProductType");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Percent).HasColumnName("percent");
+            entity.Property(e => e.Title).HasMaxLength(50);
+        });
+
+        modelBuilder.Entity<Shop>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Shop_pkey");
+
+            entity.ToTable("Shop");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Address).HasMaxLength(300);
+            entity.Property(e => e.AgentId).HasColumnName("AgentID");
+            entity.Property(e => e.Title).HasMaxLength(150);
+        });
+
+        modelBuilder.Entity<Supplier>(entity =>
+        {
+            entity.HasKey(e => e.Id).HasName("Supplier_pkey");
+
+            entity.ToTable("Supplier");
+
+            entity.Property(e => e.Id).HasColumnName("ID");
+            entity.Property(e => e.Inn)
+                .HasMaxLength(12)
+                .HasColumnName("INN");
+            entity.Property(e => e.SupplierType).HasMaxLength(20);
+            entity.Property(e => e.Title).HasMaxLength(150);
+        });
+
+        OnModelCreatingPartial(modelBuilder);
+    }
+
+    partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
+}

Models/Material.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class Material
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public int CountInPack { get; set; }
+
+    public string Unit { get; set; } = null!;
+
+    public double? CountInStock { get; set; }
+
+    public double MinCount { get; set; }
+
+    public string? Description { get; set; }
+
+    public decimal Cost { get; set; }
+
+    public string? Image { get; set; }
+
+    public int MaterialTypeId { get; set; }
+
+    public virtual ICollection<MaterialCountHistory> MaterialCountHistories { get; set; } = new List<MaterialCountHistory>();
+
+    public virtual MaterialType MaterialType { get; set; } = null!;
+
+    public virtual ICollection<ProductMaterial> ProductMaterials { get; set; } = new List<ProductMaterial>();
+
+    public virtual ICollection<Supplier> Suppliers { get; set; } = new List<Supplier>();
+}

Models/MaterialCountHistory.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class MaterialCountHistory
+{
+    public int Id { get; set; }
+
+    public int MaterialId { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+
+    public double CountValue { get; set; }
+
+    public virtual Material Material { get; set; } = null!;
+}

Models/MaterialType.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class MaterialType
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public double DefectedPercent { get; set; }
+
+    public virtual ICollection<Material> Materials { get; set; } = new List<Material>();
+}

Models/Product.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class Product
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public int? ProductTypeId { get; set; }
+
+    public string ArticleNumber { get; set; } = null!;
+
+    public string? Description { get; set; }
+
+    public string? Image { get; set; }
+
+    public int? ProductionPersonCount { get; set; }
+
+    public int? ProductionWorkshopNumber { get; set; }
+
+    public decimal MinCostForAgent { get; set; }
+
+    public virtual ICollection<ProductCostHistory> ProductCostHistories { get; set; } = new List<ProductCostHistory>();
+
+    public virtual ICollection<ProductMaterial> ProductMaterials { get; set; } = new List<ProductMaterial>();
+
+    public virtual ICollection<ProductSale> ProductSales { get; set; } = new List<ProductSale>();
+
+    public virtual ProductType? ProductType { get; set; }
+}

Models/ProductCostHistory.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class ProductCostHistory
+{
+    public int Id { get; set; }
+
+    public int ProductId { get; set; }
+
+    public DateTime ChangeDate { get; set; }
+
+    public decimal CostValue { get; set; }
+
+    public virtual Product Product { get; set; } = null!;
+}

Models/ProductMaterial.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class ProductMaterial
+{
+    public int ProductId { get; set; }
+
+    public int MaterialId { get; set; }
+
+    public double? Count { get; set; }
+
+    public virtual Material Material { get; set; } = null!;
+
+    public virtual Product Product { get; set; } = null!;
+}

Models/ProductSale.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class ProductSale
+{
+    public int Id { get; set; }
+
+    public int AgentId { get; set; }
+
+    public int ProductId { get; set; }
+
+    public DateOnly SaleDate { get; set; }
+
+    public int ProductCount { get; set; }
+
+    public virtual Agent Agent { get; set; } = null!;
+
+    public virtual Product Product { get; set; } = null!;
+}

Models/ProductType.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class ProductType
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public double DefectedPercent { get; set; }
+
+    public int? Percent { get; set; }
+
+    public virtual ICollection<Product> Products { get; set; } = new List<Product>();
+}

Models/Shop.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class Shop
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public string? Address { get; set; }
+
+    public int AgentId { get; set; }
+}

Models/Supplier.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+
+namespace demko_v.Models;
+
+public partial class Supplier
+{
+    public int Id { get; set; }
+
+    public string Title { get; set; } = null!;
+
+    public string Inn { get; set; } = null!;
+
+    public DateOnly StartDate { get; set; }
+
+    public int? QualityRating { get; set; }
+
+    public string? SupplierType { get; set; }
+
+    public virtual ICollection<Material> Materials { get; set; } = new List<Material>();
+}

PriorityWindow.axaml

@@ -0,0 +1,13 @@
+<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="demko_v.PriorityWindow"
+        Title="PriorityWindow">
+    <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" Spacing="10">
+        <TextBlock Text="Введите новый приоритет:"/>
+        <TextBox x:Name="PriorityTextBox" Width="100" HorizontalAlignment="Center"/>
+        <Button Content="OK" Click="Ok_OnClick" HorizontalAlignment="Center"/>
+    </StackPanel>
+</Window>

PriorityWindow.axaml.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using demko_v.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace demko_v;
+
+public partial class PriorityWindow : Window
+{
+    private int AgentId;
+    public int? Priority { get; private set; }
+
+    public PriorityWindow(int agentId)
+    {
+        InitializeComponent();
+        AgentId = agentId;
+    }
+
+    private void Ok_OnClick(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        if (int.TryParse(PriorityTextBox.Text, out int priority))
+        {
+            Priority = priority;
+            using var ctx = new DemoAgentsContext();
+            ctx.Agents.Where(a => a.Id == AgentId)
+                .ExecuteUpdate(setters => setters.SetProperty(a => a.Priority, Priority));
+            ctx.SaveChanges();
+            Close();
+        }
+        else
+        {
+            Console.WriteLine("Invalid priority number");
+        }
+    }
+}

Program.cs

@@ -0,0 +1,21 @@
+using Avalonia;
+using System;
+
+namespace demko_v;
+
+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

@@ -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="demko_v.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>