olep/WPF Entity Examole/okno.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WPF_Entity_Examole
{
    /// <summary>
    /// Логика взаимодействия для okno.xaml
    /// </summary>
    public partial class okno : Window
    {
        gr671_mkyuEntities i;
        public okno()
        {
            InitializeComponent();
            i = new gr671_mkyuEntities();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (login.Text == "" || password.Password == "" )
            {
                MessageBox.Show("Пустые поля");
                return;
            }
            if (i.Users.Select(item => item.Login + " " + item.Password).Contains(login.Text + " " + password.Password))
            {
                MessageBox.Show("Вы авторизованы");
                MainWindow mw = new MainWindow();
                mw.Show();
                this.Close();         
            }
            else
            {
                MessageBox.Show("Error");
                return;

            }
     
        }
    }
}