MVC前台Post/Get异步获得数据时参数的取值问题

　　　　　　　　$.ajax({
                    type: "POST",
                    dataType: "text",//返回类型为文本
                    url:"/Order/AjaxGetCoupon?ids="+id,
                    data: { ConponCode: code, TotalPrice: totalPrice },
                    success: function (data) {
                        if (data == "False") {
                            ShowFailTip('服务器繁忙，请稍候再试！');
                            return;
                        }
                        else if (data == "No") {
                            ShowFailTip('您输入的优惠券不存在或已过期！');
                            return;
                        } else if (data == "Used") {
                            ShowFailTip('您输入的优惠券已使用！');
                            return;
                        } else if (data == "Limit") {
                            ShowFailTip('您输入的优惠券不满足最低消费金额！');
                            return;
                        } else {
                            $("#couponPriceId").text("￥" + data.split("|")[0]);
                            $("#payPriceId").text("￥" + data.split("|")[1]);
                        }
                    }
                });

[HttpPost]       

public ActionResult AjaxGetCoupon(FormCollection Fm,int ids)
        {//ids为url中的参数或后台获得URL后的参数 Request.QueryString["ids"]
            if (string.IsNullOrWhiteSpace(Fm["ConponCode"]))
            {
                return base.Content("False");
            }
            string couponCode = Fm["ConponCode"];
            decimal num = Globals.SafeDecimal(Fm["TotalPrice"], (decimal) 0M);
            BLL.CouponInfo info = new BLL.CouponInfo();
            Model.CouponInfo couponInfo = info.GetCouponInfo(couponCode, false);
            if (couponInfo != null)
            {
                if (couponInfo.Status == 2)
                {
                    return base.Content("Used");
                }
                if (couponInfo.LimitPrice >= num)
                {
                    return base.Content("Limit");
                }
                ShoppingCartInfo cartInfo = new ShoppingCartHelper(base.currentUser.UserID).GetShoppingCart4Selected();
                switch (info.GetUseStatus(cartInfo, couponInfo))
                {
                    case 0:
                        return base.Content("No");

                    case 1:
                    {
                        string str2 = (num - couponInfo.CouponPrice).ToString("F");
                        return base.Content(couponInfo.CouponPrice.ToString("F") + "|" + str2);
                    }
                    case 2:
                        return base.Content("Used");

                    case 3:
                        return base.Content("Limit");

                    case 4:
                        return base.Content("CategoryLimit");

                    case 5:
                        return base.Content("ProductLimit");

                    case 6:
                        return base.Content("SKULimit");

                    case 7:
                        return base.Content("CategoryNo");

                    case 8:
                        return base.Content("ProductNo");

                    case 9:
                        return base.Content("SKUNo");
                }
            }
            return base.Content("No");
        }