kursovaya/GroupsFromAdminWindow.axaml.cs

using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;
using kursovaya.Models;
using Microsoft.EntityFrameworkCore.Scaffolding.Metadata;

namespace kursovaya;

public partial class GroupsFromAdminWindow : Window
{
    public List<Group> dataSourceGroups = new List<Group>();
    public ObservableCollection<Group> Groups = new ObservableCollection<Group>();
    public GroupsFromAdminWindow()
    {
        InitializeComponent();

        var ctx = new DatabaseContext();

        dataSourceGroups = ctx.Groups.ToList();
        DisplayGroups();
        FlatGrid.ItemsSource = Groups;
    }

    public void DisplayGroups()
    {
        var ctx = new DatabaseContext();
        var temp = dataSourceGroups;
        Groups.Clear();

        foreach (var group in temp)
        {
            Groups.Add(group);
        }
    }

    private void ButtonBack_OnClick(object? sender, RoutedEventArgs e)
    {
        Close();
    }

    private async void ButtonAddGroup_OnClick(object? sender, RoutedEventArgs e)
    {
        AddGroup addGroup = new AddGroup();
        var groups = await addGroup.ShowDialog<List<Group>>(this);
        if (groups == null || groups.Count == 0)
        {
            return;
        }
        dataSourceGroups.AddRange(groups);
        DisplayGroups();
    }
}