/// <summary> /// This method invokes method for adding item to order. /// </summary> public void AddItemExecute() { try { orderItems.AddOrderItem(MenuItem, Ordered, Quantity); //invokes method to update a list of ordered items OrderList = orderItems.GetOrderedItems(Username); TotalPrice = newOrder.CalculateTotalPrice(Ordered.OrderID); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } }