kursovaya/TeachersFromAdminWindow.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;

namespace kursovaya;

public partial class TeachersFromAdminWindow : Window
{
    public List<Teacher> dataSourceTeachers = new List<Teacher>();
    public ObservableCollection<Teacher> Teachers = new ObservableCollection<Teacher>();
    List<Teacher> _addedTeachers = new List<Teacher>();
    public TeachersFromAdminWindow()
    {
        InitializeComponent();
        
        var ctx = new DatabaseContext();

        dataSourceTeachers = ctx.Teachers.ToList();
        DisplayTeachers();
        FlatGrid.ItemsSource = Teachers;
    }
    
    private void ButtonBack_OnClick(object? sender, RoutedEventArgs e)
    {
        if (_addedTeachers == null || _addedTeachers.Count == 0)
        {
            Close(true);
        }
        else
        {
            Close(false);
        }
    }
    
    public void DisplayTeachers()
    {
        var ctx = new DatabaseContext();
        var temp = dataSourceTeachers;
        Teachers.Clear();

        foreach (var teacher in temp)
        {
            Teachers.Add(teacher);
        }
    }
    
    private async void ButtonAddTeacher_OnClick(object? sender, RoutedEventArgs e)
    {
        AddTeacher addTeacher = new AddTeacher();
        _addedTeachers = await addTeacher.ShowDialog<List<Teacher>>(this);
        if (_addedTeachers == null || _addedTeachers.Count == 0)
        {
            return;
        }
        dataSourceTeachers.AddRange(_addedTeachers);
        DisplayTeachers();
    }
}