private void AddBtn_Click(object sender, EventArgs e) { try { if (id == 0) { ShowAutoClosingMessageBox("Please,select a product!", "Error"); } else { customerService.AddShoppingList(new Contracts.Request.ShoppingBasket.AddShoppingBasketRequest(customer.CustomerID, id, Convert.ToInt16(comboBox1.Text), Convert.ToDecimal(ProductCost.Text))); ShowAutoClosingMessageBox("You can visit your shopping box to buy", "Succesfully Added"); } } catch (Exception ex) { MessageBox.Show(ex.Message); } }