private void Button_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                Model1 db     = new Model1();
                int    a      = Convert.ToInt32(idtxt.Text);
                var    orderr = db.Orders
                                .Where(c => c.id_order == a)
                                .FirstOrDefault();

                orderr.order_status = Convert.ToInt32(LogicStatus.GetIdStatus(status.Text));
                orderr.client       = Convert.ToInt32(LogicClient.GetIdClient(client.Text));
                orderr.master       = Convert.ToInt32(LogicMaster.GetIdMaster(master.Text));

                orderr.date_of_acceptance = accept.DisplayDate;
                orderr.date_of_return     = @return.DisplayDate;
                orderr.cost        = Convert.ToInt32(price.Text);
                orderr.description = description.Text;

                db.SaveChanges();

                MessageBox.Show("Заказ изменён!");
                ViewOrderMaster vo = new ViewOrderMaster();
                vo.Show();
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
        private void MenuItem_Click_5(object sender, RoutedEventArgs e)
        {
            ViewOrderMaster vo = new ViewOrderMaster();

            vo.Show();
            Close();
        }
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            ViewOrderMaster vo = new ViewOrderMaster();

            vo.Show();
            Close();
        }