Test_Kvalif/WpfApp1/Windows/AdminWindow.xaml.cs

using WpfApp1.Methods;
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 WpfApp1.Windows
{
    /// <summary>
    /// Логика взаимодействия для AdminWindow.xaml
    /// </summary>
    public partial class AdminWindow : Window
    {
        CafeEntities db;
        public AdminWindow()
        {
            InitializeComponent();
            db = new CafeEntities();
        }

        private void WindowLoaded(object sender, RoutedEventArgs e)
        {
            db = new CafeEntities();
            UserTable.ItemsSource = db.Test_User.ToList();
        }

        private void OpenRegistrationWindowClick(object sender, RoutedEventArgs e)
        {
            RegistrationWindow registrationWindow = new RegistrationWindow();
            registrationWindow.Owner = this;
            registrationWindow.ShowDialog();
            UserTable.ItemsSource = db.Test_User.ToList();
        }
    }
}