loferl/Rkis29/Command/MainWindowCod.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using Rkis29;
using Rkis29.ViewModel;
using Rkis29.Windows;

namespace Rkis29.Command
{
    

    public class MainWindowCod : BaseViewModel
    {
    private User _user = new User();
    private ObservableCollection<User> _users;
    private RelayCommand _NextWindow;
    private RelayCommand _RegistrationWindow;
        public RelayCommand NextWindow
        {

            get
            {
                return _NextWindow ?? 
                (_NextWindow = new RelayCommand(x =>
                {
                    PasswordBox pb = (PasswordBox)x;
                    using (loferlContext db = new loferlContext())
                    {
                        User user_ = db.Users.FirstOrDefault(el => el.Login == User.Login  && el.Password == pb.Password);
                        if (user_ != null)
                        {
                            User.AutoUser = user_;
                            YourProfile Window = new YourProfile();
                            Window.Show();
                            foreach (var win in App.Current.Windows)
                            {
                                if (win is MainWindow mainWindow)
                                {
                                    mainWindow.Close();
                                }
                            }

                        }
                    }
                }));
            }

        }
        public RelayCommand RegistrationWindow
        {
            get
            {
                return _RegistrationWindow ?? (_RegistrationWindow = new RelayCommand(x =>
                {
                    Registration Window = new Registration();
                    Window.Show();
                    foreach (var win in App.Current.Windows)
                    {
                        if (win is MainWindow mainWindow)
                        {
                            mainWindow.Close();
                        }
                    }

                }

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