public ActionResult Create(OrderDetail orderdetail)
        {
            if (ModelState.IsValid)
            {
                db.OrderDetails.Add(orderdetail);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.OrderId = new SelectList(db.Orders, "OrderId", "OrderId", orderdetail.OrderId);
            return View(orderdetail);
        }
        private Order ProcessTheOrder(Cart cart, ShippingDetails shippingDetails)
        {
            var order = new Order();
            var orderDetailsList = new List<OrderDetail>();

            try
            {
                foreach (var item in cart.Lines)
                {
                    var orderDetail = new OrderDetail
                    {
                        OrderId = order.OrderId,
                        ProductName = item.Product.Name,
                        Quantity = item.Quantity,
                        UnitPrice = item.Product.Price
                    };
                    order.TotalCost += orderDetail.UnitPrice*orderDetail.Quantity;
                    //TODO: Make Unit Test
                    orderDetailsList.Add(orderDetail);
                }
            }
            catch (Exception)
            {
                // TODO: Add HttpException handling in place of Exception below
                throw new Exception("Erorr building list of oder details -> cart.Lines was probably null.");
            }

            var firstCartLineProduct = cart.Lines.FirstOrDefault();
            int establishmentId = firstCartLineProduct.Product.EstablishmentId;

            order.OrderDetails = orderDetailsList;
            order.EstablishmentId = establishmentId;
            order.CustomerName = shippingDetails.Name;
            order.TimeProcessed = DateTime.Now;
            return order;
        }
        public ActionResult Edit(OrderDetail orderdetail)
        {
            if (ModelState.IsValid)
            {
                db.Entry(orderdetail).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.OrderId = new SelectList(db.Orders, "OrderId", "OrderId", orderdetail.OrderId);
            return View(orderdetail);
        }