public ActionResult ProcedToCheckout(CreateOrderViewModel viewModel)
        {
            var customer = orderRepo.GetSingleEntity(x => x.UserId == User.Identity.Name);

            if (ModelState.IsValid)
            {
                Order order = ConvertViewModelToOrder(viewModel, User.Identity.Name);

                orderRepo.Insert(order);
                orderRepo.SaveChanges();

                shoppingCartLogic = ShoppingCartLogic.GetShoppingCart(this.HttpContext);
               order.TotalPrice = shoppingCartLogic.ShoppingCartToOrderDetails(order);

               orderRepo.Update(order);
               orderRepo.SaveChanges();

                return RedirectToAction("Index");
            }

            viewModel.PaymentMethods = paymentMethodRepo.GetWithFilterAndOrder();
            viewModel.CollectionMethods = collectionRepo.GetWithFilterAndOrder();

            return View(viewModel);
        }
        /// <summary>
        /// 把ProcedToCheckout()傳回來的CreateOrderViewModel轉成對應的Order
        /// 因為Order可能是「送餐到府」也有可能是「來店取餐」,所以需要做到判斷
        /// </summary>
        /// <param name="viewModel"></param>
        /// <param name="userId"></param>
        /// <returns></returns>
        private Order ConvertViewModelToOrder(CreateOrderViewModel viewModel, string userId)
        {
            Order order = new Order()
            {
                UserId = userId,
                OrderDateTime = DateTime.Now,
                RequireDateTime = viewModel.RequireDateTime,
                TotalPrice = 0,
                PaymentMethodId = viewModel.PaymentMethodId,
                CollectionMethodId = viewModel.CollectionMethodId,
                Comment = viewModel.Comment

            };
            if ((viewModel.PaymentMethodId == 1) && (viewModel.IsUserRegAddress == false))
            {
                order.Address_AddCity = viewModel.AddCity;
                order.Address_AddDistrict = viewModel.AddDistrict;
                order.Address_AddFull = viewModel.AddFull;
                order.Address_PostCode = viewModel.PostCode;

            }
            else
            {
                Customer customer = customerRepo.GetSingleEntity(x => x.UserId == User.Identity.Name);
                order.Address_AddCity = customer.Address.AddCity;
                order.Address_AddDistrict = customer.Address.AddDistrict;
                order.Address_AddFull = customer.Address.AddFull;
                order.Address_PostCode = customer.Address.PostCode;
            }
            return order;
        }
        //private EOSystemContex db = new EOSystemContex();
        public ActionResult ProcedToCheckout()
        {
            var viewModel = new CreateOrderViewModel()
                {
                    RequireDateTime = DateTime.Now,
                    PaymentMethods = paymentMethodRepo.GetWithFilterAndOrder(),
                    CollectionMethods = collectionRepo.GetWithFilterAndOrder()
                };

            return View(viewModel);
        }