public ActionResult Check_Car(ShoppingCarCheckList list, decimal TotalPrice)
        {
            string UserID = Session["Member"].ToString();

            int count = 0;

            foreach (var item in list.ShoppingCarLists)
            {
                if (item.Order_Flag == false)
                {
                    count++;
                }
            }
            if (count == list.ShoppingCarLists.Count)
            {
                TempData["CheckMessage"] = "請選擇商品!";
                return(RedirectToAction("Check_Car"));
            }

            foreach (var item in list.ShoppingCarLists)
            {
                var shoppingCarList = db.ShoppingCarList.Where(m => m.UserID == UserID && m.Id == item.Id).FirstOrDefault();
                shoppingCarList.Order_Flag = item.Order_Flag;
                shoppingCarList.ProductQty = item.ProductQty;
            }
            db.SaveChanges();
            Session["TotalPrice"] = TotalPrice;
            return(RedirectToAction("ShoppingCar"));
        }
        public ActionResult Check_Car()
        {
            string UserID = Session["Member"].ToString();
            ShoppingCarCheckList shoppingCarCheckList = new ShoppingCarCheckList();

            shoppingCarCheckList.ShoppingCarLists = db.ShoppingCarList.Where(m => m.UserID == UserID).ToList <ShoppingCarList>();
            return(View("Check_Car", shoppingCarCheckList));
        }