kursovaya/StudentsFromAdminWindow.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 StudentsFromAdminWindow : Window
{
    public List<Student> dataSourceStudents = new List<Student>();
    public ObservableCollection<Student> Students = new ObservableCollection<Student>();
    public StudentsFromAdminWindow()
    {
        InitializeComponent();
        
        var ctx = new DatabaseContext();

        dataSourceStudents = ctx.Students.ToList();
        DisplayStudents();
        FlatGrid.ItemsSource = Students;
    }
    
    
    public void DisplayStudents()
    {
        var ctx = new DatabaseContext();
        var temp = dataSourceStudents;
        Students.Clear();

        foreach (var student in temp)
        {
            Students.Add(student);
        }
    }
    
    private void ButtonBack_OnClick(object? sender, RoutedEventArgs e)
    {
        Close();
    }
    
    private async void ButtonAddStudent_OnClick(object? sender, RoutedEventArgs e)
    {
        AddStudent addStudent = new AddStudent();
        var students = await addStudent.ShowDialog<List<Student>>(this);
        
        if (students == null || students.Count == 0)
            return;
        
        dataSourceStudents.AddRange(students);
        DisplayStudents();
    }
}