teachers_mvvm/Teachers/Views/AddCourseView.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;
using System.Collections.Generic;
using Teachers.Models;
using Teachers.ViewModels;

namespace Teachers;

public partial class AddCourseView : UserControl
{
    public AddCourseView()
    {
        InitializeComponent();
        DataContext = new AddTeacherViewModel();
        //if (bSaveCourse.IsPressed) 
    }

    private void bAddCourse(object sender, RoutedEventArgs e)
    {
        //AddTeacherViewModel viewModel = new AddTeacherViewModel();
        //viewModel.AddCourse();
        AddCourse();
        var window = this.VisualRoot as Window;
        window?.Close();
    }

    public void AddCourse()
    {
        TeacherCourse tcToAdd = new TeacherCourse();
        tcToAdd.IdCourseNavigation = _newCourse;
        tcToAdd.IdTeacherNavigation = _newTeacher;
        //tcToAdd.IdCourse = _newCourse.Id;
        //tcToAdd.IdTeacher = _newTeacher.Id;
        List<TeacherCourse> tcToAddList = new List<TeacherCourse>();
        tcToAddList.Add(tcToAdd);
        //Course addCourse = new Course()
        //{
        //    Name = _newCourse.Name,
        //    Duration = _newCourse.Duration,
        //    //TeacherCourses = tcToAddList,
        //    //TeacherCourses = new TeacherCourse() { IdCourseNavigation = NewCourse, IdTeacherNavigation = NewTeacher },
        //};
        //MainWindowViewModel.myConnection.Courses.Add(NewCourse);
        //MainWindowViewModel.myConnection.Courses.Add(addCourse);
        //AddTeacherViewModel viewModel = new AddTeacherViewModel();
        //var a = viewModel._courseWindow;
        MainWindowViewModel.myConnection.Courses.Add(this.NewCourse);
        MainWindowViewModel.myConnection.SaveChanges();
        //window.Close();
        //rubilnik = false;
        //ShowAddCourse();
        //CloseWindow();
    }

    private void bAddCourse(object sender, RoutedEventArgs e)
    {
        AddCourse();
        var window = this.VisualRoot as Window;
        window?.Close();
        AddTeacherViewModel viewModel = new AddTeacherViewModel();
        viewModel.UpdateList();
    }

    public void AddCourse()
    {
        Course newCourse = new Course() { Name = tbCourse.Text, Duration = int.Parse(tbDuration.Text) };
        MainWindowViewModel.myConnection.Courses.Add(newCourse);
        MainWindowViewModel.myConnection.SaveChanges();
    }
}