CopyCenter/CopyCenter/MainWindow.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.Navigation;
using System.Windows.Shapes;

namespace CopyCenter
{
    /// <summary>
    /// Логика взаимодействия для MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        gr672_liiEntities db;
        public MainWindow()
        {
            InitializeComponent();
            db = new gr672_liiEntities();
        }

        private void AuthorizationClick(object sender, RoutedEventArgs e)
        {
            if (login.Text == "" || password.Password == "")
            {
                MessageBox.Show("Введено неверное значение!");
                return;
            }
            if (db.User.Select(item => item.Login + " " + item.Password).Contains(login.Text + " " + password.Password))
            {
                MessageBox.Show("Добро пожаловать, вы авторизированы");
                MenuWindow mw = new MenuWindow();
                mw.Show();
                this.Close();
            }
            else
            {
                MessageBox.Show("Введено неверное значение логина/пароля1");
            }
        }
    }
}