kursovaya/AdminWindow.axaml.cs

using System;
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 kursovaya.ModelsLocal;

namespace kursovaya;

public partial class AdminWindow : Window
{
    List<Discipline> Disciplines = new List<Discipline>();
    List<Group> Groups = new List<Group>();
    List<Teacher> Teachers = new List<Teacher>();
    
    public List<DisciplineGroupTeacher> dataSourceDisciplineGroupTeachers = new List<DisciplineGroupTeacher>();
    public ObservableCollection<DisciplineGroupTeacher> DisciplineGroupTeachers = new ObservableCollection<DisciplineGroupTeacher>();
    public AdminWindow()
    {
        InitializeComponent();
        
        var ctx = new DatabaseContext();

        Disciplines = ctx.Disciplines.ToList();
        Groups = ctx.Groups.ToList();
        Teachers = ctx.Teachers.ToList();

        var disciplineTeachers = ctx.DisciplineTeachers.ToList();

        foreach (DisciplineTeacher disciplineTeacher in disciplineTeachers)
        {
            var teacher = ctx.Teachers.FirstOrDefault(t => t.Id == disciplineTeacher.IdTeacher);
            var discipline = ctx.Disciplines.FirstOrDefault(d => d.Id == disciplineTeacher.IdDiscipline);
            var groups = ctx.Groups.Where(g => ctx.Attestations.Any(at => ctx.Students.Any(s => s.Id == at.IdUser && s.IdGroup == g.Id) && at.IdDiscipline == discipline.Id));
            foreach (Group group in groups)
            {
                dataSourceDisciplineGroupTeachers.Add(new DisciplineGroupTeacher(){Teacher = teacher, Discipline = discipline, Group = group});
            }
        }
        
        DisplayAll();
        
        MultComboBox.ItemsSource = DisciplineGroupTeachers.Select(dg => dg.NameComboBox).ToList();
        FlatGrid.ItemsSource = DisciplineGroupTeachers;
    }
    
    public void DisplayAll()
    {
        var ctx = new DatabaseContext();
        var temp = dataSourceDisciplineGroupTeachers;
        DisciplineGroupTeachers.Clear();

        foreach (var item in temp)
        {
            DisciplineGroupTeachers.Add(item);
        }
    }
    
    public void Display()
    {
        if (MultComboBox.SelectionBoxItem != null)
        {
            var selectedDiscGroupTeacher = DisciplineGroupTeachers.FirstOrDefault(dg => dg.NameComboBox == MultComboBox.SelectedItem.ToString());
            var filteredData = DisciplineGroupTeachers.Where(dg => dg.Discipline.Name == selectedDiscGroupTeacher.Discipline.Name && dg.Group.Id == selectedDiscGroupTeacher.Group.Id && dg.Teacher.Fio == selectedDiscGroupTeacher.Teacher.Fio).ToList();
            FlatGrid.ItemsSource = filteredData;
        }
    }
    
    private void ButtonBack_OnClick(object? sender, RoutedEventArgs e)
    {
        Close();
    }

    private void ButtonCheck_OnClick(object? sender, RoutedEventArgs e)
    {
        Display();
    }

    private void ButtonCheckGroups_OnClick(object? sender, RoutedEventArgs e)
    {
        GroupsFromAdminWindow groupsFromAdminWindow = new GroupsFromAdminWindow();
        groupsFromAdminWindow.ShowDialog(this);
    }
    
    private void ButtonCheckStudents_OnClick(object? sender, RoutedEventArgs e)
    {
        StudentsFromAdminWindow studentsFromAdminWindow = new StudentsFromAdminWindow();
        studentsFromAdminWindow.ShowDialog(this);
    }
    
    private async void ButtonCheckTeachers_OnClick(object? sender, RoutedEventArgs e)
    {
        TeachersFromAdminWindow teachersFromAdminWindow = new TeachersFromAdminWindow();
        var result = await teachersFromAdminWindow.ShowDialog<List<DisciplineGroupTeacher>>(this);

        dataSourceDisciplineGroupTeachers.AddRange(result);
        DisplayAll();
    }
    
    private void ButtonCheckDiscipline_OnClick(object? sender, RoutedEventArgs e)
    {
        AddDiscipline addDiscipline = new AddDiscipline();
        addDiscipline.ShowDialog(this);
    }
}