loferl/Rkis29/Command/RegistrationCod.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using Rkis29.ViewModel;
using Rkis29.Windows;
namespace Rkis29.Command
{
    public class RegistrationCod: BaseViewModel
    {
        private ObservableCollection<User> _users;
        private User _user;
        private RelayCommand _registration;
        private RelayCommand _return;
        public RelayCommand Return
        {
            get
            {
                return _return ?? (_return = new RelayCommand(x =>
                {
                    MainWindow Window = new MainWindow();
                    Window.Show();
                    foreach (var win in App.Current.Windows)
                    {
                        if (win is Registration mainWindow)
                        {
                            mainWindow.Close();
                        }
                    }

                }

                ));
            }
        }
        public RelayCommand Registration
        {
            get
            {
                return _registration ??
                  (_registration = new RelayCommand((x) =>
                  {
                      if ((User.FirstName != null) && (User.Name != null) && (User.LastName != null) && (User.PhonNum != null) && (User.Login != null) && (User.Password != null))
                      {


                          loferlContext loferlcontext = new loferlContext();
                          User user = User;
                          loferlcontext.Users.Add(user);
                          loferlcontext.SaveChanges();
                          user = null;

                          MainWindow mainWindow = new MainWindow();
                          mainWindow.Show();
                          foreach (var window in App.Current.Windows)
                          {
                              if (window is Registration registration)
                              {
                                  registration.Close();
                              }
                          }
                      }
                      else
                      {
                          MessageBox.Show("You are not write to the box ");
                      }

                  }));
            }
        }

        public ObservableCollection<User> Users
        {
            get => _users;
            set
            {
                _users = value;
                OnPropertyChanged();
            }
        }

        public User User
        {
            get => _user;
            set
            {
                _user = value;
                OnPropertyChanged();
            }
        }
        public RegistrationCod()
        {
            loferlContext loferlcontext = new loferlContext();
            _users = new ObservableCollection<User>(loferlcontext.Users);
            _user = new User();
        }

    }
}