public ActionResult AddComment(FormCollection formCollection)
        {
            int shopId = int.Parse(formCollection.Get("ShopId"));
            string star = formCollection.Get("CommentStar");
            string payMoney = formCollection.Get("PayMoney");
            string deliveryTime = formCollection.Get("DeliveryTime");
            string content = formCollection.Get("CommentContent");
            string requestUrl = formCollection.Get("RequestUrl");

            UserModel userModel = new UserModel();
            ShopModel shopModel = new ShopModel();

            UserInfo userInfo = userModel.GetUserInfo(User.Identity.Name);

            ShopComment shopComment = new ShopComment();
            shopComment.ShopId = shopId;
            shopComment.UserId = userInfo.Id;
            shopComment.Stars = String.IsNullOrWhiteSpace(star) ? (short)0 : short.Parse(star);
            shopComment.PayMoney = String.IsNullOrWhiteSpace(payMoney) ? (short)0 : short.Parse(payMoney);
            shopComment.DeliveryTime = String.IsNullOrWhiteSpace(deliveryTime) ? (short)0 : short.Parse(deliveryTime);
            shopComment.Comment = content;
            shopComment.CreateTime = DateTime.Now;
            shopModel.Add(shopComment);

            short shopAvgStars = (short)Math.Round(shopModel.GetShopComments(shopComment.ShopId).Average(r => r.Stars));
            short shopAvgPayMoney = (short)Math.Round(shopModel.GetShopComments(shopComment.ShopId).Average(r => r.PayMoney));
            short shopAvgDeliveryTime = (short)Math.Round(shopModel.GetShopComments(shopComment.ShopId).Average(r => r.DeliveryTime));

            ShopRankingAttribute shopRankingAttr = shopModel.GetShopRankingAttribute(shopId);
            shopRankingAttr.Stars = shopAvgStars;
            shopRankingAttr.AveragePayMoney = shopAvgPayMoney;
            shopRankingAttr.DeliveryTime = shopAvgDeliveryTime;
            shopModel.Save();

            Shop shopInfo = shopModel.GetShop(shopId);
            userModel.AddUserPoint(userInfo.Id, "对店铺 <a href=\"/shop/detail/" + shopId + "\">" + shopInfo.Name + "</a> 发表评论", 2);
            userModel.AddUserMessage(userInfo.Id, "积分动态", "您因对店铺 <a href=\"/shop/detail/" + shopId + "\">" + shopInfo.Name + "</a>进行了评论而获得了" + 2 + "点积分。");

            return Redirect(requestUrl);
        }