public ActionResult AddressAndPayment(FormCollection form)
        {
            Order order = new Order();
            TryUpdateModel(order);

            try
            {
                order.OrderDate = DateTime.Now;

                // Save Order
                storeDB.Orders.Add(order);
                storeDB.SaveChanges();
                // Process order
                ShoppingCart cart = new ShoppingCart(this.HttpContext);
                cart.CreateOrder(order);
                return RedirectToAction("Complete", new { id = order.OrderId });
            }
            catch
            {
                return View(order);
            }
        }
        public void CreateOrder(Order order)
        {
            decimal orderTotal = 0;

            var cartItems = GetCartItems();
            // Iterate over the items in the cart,
            // adding the order details for each
            foreach(var item in cartItems)
            {
                var orderDetail = new OrderDetail
                {
                    BookIsbn = item.BookIsbn,
                    OrderId = order.OrderId,
                    UnitPrice = item.Book.BookPrice,
                    Quantity = item.Count
                };

                // Set the order total of the shopping cart
                orderTotal += (item.Count * item.Book.BookPrice);

                storeDB.OrderDetails.Add(orderDetail);
            }

            // set the order's total to the orderTotal count
            order.Total = orderTotal;
            // save the order
            storeDB.SaveChanges();
            // Empty the shopping cart
            EmptyCart();
        }