private void Button_Click(object sender, RoutedEventArgs e)
        {
            CHECK check = new CHECK()
            {
                C_ID = 1,
                DATA = DateTime.Now,
                S_ID = MainWindow.seller.S_ID,
            };

            dbContext.CHECKs.Add(check);
            foreach (var item in listMed)
            {
                Sell sell = new Sell()
                {
                    CK_ID = check.CK_ID,
                    M_ID  = item.M_ID
                };
                dbContext.Sells.Add(sell);
                dbContext.SaveChanges();
            }


            MessageBox.Show("Заказ оформлен");

            ListMedicament.Items.Clear();
            Cost.Text = "0";
            this.Close();
        }
        private void BtnSave_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var    idAccess = dbcontext.Sellers.First(s => s.Access_Seller.NAME == listAccess.Text).AS_ID;
                Seller seller   = new Seller()
                {
                    S_FIRST_NAME = TBName.Text,
                    S_LAST_NAME  = TBSurname.Text,
                    S_PATRONYMIC = TBLastName.Text,
                    S_POST       = TBpost.Text,
                    S_PHONE      = TBPhone.Text,
                    S_ADRESS     = TBAdress.Text,
                    S_PASSWORD   = TBPassword.Text,
                    S_LOGIN      = TBLogin.Text,
                    AS_ID        = idAccess
                };


                dbcontext.Sellers.Add(seller);
                dbcontext.SaveChanges();
                MessageBox.Show("Информация сохранена");
                this.Close();
            }
            catch (Exception)
            {
                MessageBox.Show("Введите все данные");
            }
        }