zxc/SSS/AddCar.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 SSS
{
    /// <summary>
    /// Логика взаимодействия для AddCar.xaml
    /// </summary>
    public partial class AddCar : Page
    {
        Entities DB = new Entities();
        bool flag = false;

        public AddCar()
        {
            InitializeComponent();
            Mark.ItemsSource = DB.CarBrand.ToList();
            Mark.DisplayMemberPath = "CarBrand1";
            Worker.ItemsSource = DB.Teem.ToList();
            Worker.DisplayMemberPath = "Surname_Teem";
            TypeService.ItemsSource = DB.Service.ToList();
            TypeService.DisplayMemberPath = "name_Service";
            Client.ItemsSource = DB.Client.ToList();
            Client.DisplayMemberPath = "Surname";
        }

        public AddCar(int id)
        {
            InitializeComponent();
            flag = true;
            Car OldCar = DB.Car.Find(id);
            Mark.ItemsSource = DB.CarBrand.ToList();
            Mark.DisplayMemberPath = "CarBrand1";
            Worker.ItemsSource = DB.Teem.ToList();
            Worker.DisplayMemberPath = "Surname_Teem";
            TypeService.ItemsSource = DB.Service.ToList();
            TypeService.DisplayMemberPath = "name_Service";
            Client.ItemsSource = DB.Client.ToList();
            Client.DisplayMemberPath = "Surname";
            CarBrand cr = DB.CarBrand.Where(x => x.id_CarBrand == OldCar.id_CarBrand).FirstOrDefault();
            Client client = DB.Client.Where(x => x.id_Client == OldCar.id_Client).FirstOrDefault();
            Mark.SelectedItem = cr;
            Worker.SelectedItem = DB.Teem.Where(x => x.id_Teem == OldCar.id_Teem).FirstOrDefault();
            TypeService.SelectedItem = DB.Service.Where(x => x.id_Service == OldCar.id_Service).FirstOrDefault();
            Client.SelectedItem = client;
            Mileage.Text = Convert.ToString(OldCar.Car_mileage);
        }

        private void AddRed(object sender, RoutedEventArgs e)
        {

            Car NewCar = new Car()
            {
                id_Teem = ((Teem)Worker.SelectedItem).id_Teem,
                id_Service = ((Service)TypeService.SelectedItem).id_Service,
                id_Client = ((Client)Client.SelectedItem).id_Client,
                id_CarBrand = ((CarBrand)Mark.SelectedItem).id_CarBrand,
                Car_mileage = Convert.ToInt32(Mileage.Text)
            };
            if(flag)
            {
                DB.SaveChanges();
            }
            else
            {
                DB.Car.Add(NewCar);
                DB.SaveChanges();
            }

            MessageBox.Show("Вы добавил/отредактировали машину");
        }

        private void GoBack(object sender, RoutedEventArgs e)
        {
            ClassF.Mfrm.Navigate(new CarsData());
        }
    }
}