建立商品頁面控制器

public ActionResult Index(int Page = 1)
        {
            ItemView Data = new ItemView();
           Data.Paging = new ForPaging(Page);
            Data.IdList = itemService.GetIdList(Data.Paging);
            Data.ItemBlock = new List<ItemDetailView>();
            foreach (var Id in Data.IdList)
            {
                ItemDetailView newBlock = new ItemDetailView();
                newBlock.Data = itemService.GetDataById(Id);
                string Cart = (HttpContext.Session["Cart"] != null)
                    ? HttpContext.Session["Cart"].ToString() : null;
                newBlock.InCart = cartService.CheckInCart(Cart, Id);
                Data.ItemBlock.Add(newBlock);
            }
            return View(Data);
        }
        public ActionResult Item(int Id)
        {
            ItemDetailView ViewData = new ItemDetailView();
            ViewData.Data = itemService.GetDataById(Id);
            string Cart = (HttpContext.Session["Cart"] != null)
                ? HttpContext.Session["Cart"].ToString() : null;
            ViewData.InCart = cartService.CheckInCart(Cart, Id);
            return View(ViewData);
        }