TIS/AutReg/Window1.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 AutReg
{
    /// <summary>
    /// Логика взаимодействия для Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        gr683_gddEntities db;
        public Window1()
        {
            InitializeComponent();
            db = new gr683_gddEntities();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {


            if (login.Text == "" || pass.Password == "" || f_name.Text == "" || s_name.Text == "" )
            {
                MessageBox.Show("Заполните все поля!");
            }

            if(db.Users.Select(item => item.Login).Contains(login.Text))
            {
                MessageBox.Show("Логин занят");
                return;
            }
            Users newUser = new Users()
            {
                Login = login.Text,
                Password = pass.Password,
                FName = f_name.Text,
                SName = s_name.Text,
                MName = m_name.Text
            };
            db.Users.Add(newUser);
            db.SaveChanges();
            MessageBox.Show("Вы успешно зарегестрровались");
            MainWindow mw = new MainWindow();
            mw.Show();
            this.Close();
        }
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            MainWindow mw = new MainWindow();
            mw.Show();
            this.Close();
        }
    }
}