demoekz/Cafe/MainPage.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 Cafe
{
    /// <summary>
    /// Логика взаимодействия для MainPage.xaml
    /// </summary>
    public partial class MainPage : Page
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private void LoginBtn_Click(object sender, RoutedEventArgs e)
        {
            if(LoginTBox.Text != "" && PsswrdBox.Password != "")
            {
                var AuthorizedUser = DbConnect.gr672_SdaEntities1.User.SingleOrDefault(u => u.Login == LoginTBox.Text && u.Password == PsswrdBox.Password);

                if (AuthorizedUser != null)
                {
                    switch (AuthorizedUser.Role.NameOfRole)
                    {
                        case "Administrator":
                            FramePages.MainFrame.Navigate(new AdminPage(AuthorizedUser));
                            break;
                        case "Waiter":
                            FramePages.MainFrame.Navigate(new WaiterPage(AuthorizedUser));
                            break;
                        case "Cook":
                            FramePages.MainFrame.Navigate(new CookPage(AuthorizedUser));
                            break;
                    }
                }
            }
        }
    }
}