public void AddOrderDetail() { var dao = new OrderDao(); CartModel cartModel = Session[CommonConstant.CART_SESSION] as CartModel; for (int i = 0; i < cartModel.cart.Count; i++) { var tmp = cartModel.cart.ElementAt(i); OrderDetail item = new OrderDetail(); item.FoodID = tmp.Key.ID; item.Quantily = tmp.Value; item.OrderID = dao.getOrderID(); dao.AddOrderDetail(item); } }