以下分別是Dal ,bll,controler層Dal 層：public void AddClothingToCart(int CloId, string UserId){var oldRec = db.Cart.FirstOrDefault(p => p.CloID == CloId && p.UId == UserId);if (oldRec!=null){oldRec.ClothingCount += 1;db.SaveChanges();}else{Cart newRec = new Cart();newRec.CloID = CloId;newRec.UId = UserId;newRec.ClothingCount = 1;db.Cart.Add(newRec);db.SaveChanges();}}bll層public void AddClothingToCart(int CloId, string UserId){new CartDAL().AddClothingToCart(CloId, UserId);} controler層：[UserAuthController(RoleId = "1")]public ActionResult AddClothingToCart(){string userId = User.Identity.Name;var sr = new System.IO.StreamReader(Request.InputStream);var jss = new JavaScriptSerializer();int CloId = jss.Deserialize<int>(sr.ReadToEnd());new OrderService().AddClothingToCart(CloId, userId);var rst = new { status = 1 };return Json(rst, JsonRequestBehavior.AllowGet);} 有什么錯誤嗎，我只知道他到new OrderService().AddClothingToCart(CloId, userId);就跳過下面兩行，也沒有什么錯誤啊，煩死了