AvaloniaTeachersBase/AvaloniaBaseTeacher/ViewModels/AddCourseVM.cs

using AvaloniaBaseTeacher.Models;
using Microsoft.EntityFrameworkCore;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AvaloniaBaseTeacher.ViewModels
{
    internal class AddCourseVM : ViewModelBase
    {
        Course _Newcourse;
        public Course Newcourse { get => _Newcourse; set => this.RaiseAndSetIfChanged(ref _Newcourse, value); }
        public AddCourseVM()
        {
            _Newcourse = new Course();
        }
        public AddCourseVM(int CourseId)
        {
            _Newcourse = MainWindowViewModel.myConnection.Courses.FirstOrDefault(x => x.IdCourse == CourseId);

        }

        public void AddCourse()
        {
            if(Newcourse.IdCourse == 0)
            {
                MainWindowViewModel.myConnection.Courses.Add(Newcourse);
            }
            MainWindowViewModel.myConnection.SaveChanges();
            MainWindowViewModel.Instance.PageContent = new Add();
        }

     
    }
}