/// <summary>
        /// 获取分页商品列表
        /// </summary>
        /// <param name="pageIndex">页码0-...</param>
        /// <param name="goodsPayType">商品交易类型:0.2人拼团,1.2-6人拼团,2.1分夺宝</param>
        /// <returns></returns>
        public string GetGoodsList(int pageIndex, int goodsPayType)
        {
            BaseResponseModel <List <GoodsModel> > responseModel = new BaseResponseModel <List <GoodsModel> >();

            responseModel.StatusCode = (int)ActionParams.code_ok;
            try
            {
                var filter = Builders <GoodsModel> .Filter.Eq(x => x.GoodsPayType, goodsPayType);

                var find    = new MongoDBTool().GetMongoCollection <GoodsModel>().Find(filter).Skip(pageIndex * pageSize);
                var count   = find.Count();
                var pageSum = (count / pageSize) + (count % pageSize == 0 ? 0 : 1);
                List <GoodsModel> GoodsModelList = null;
                if (pageSum >= pageIndex + 1)
                {
                    GoodsModelList = find.Skip(pageIndex * pageSize).Limit(pageSize).ToList();
                    if (GoodsModelList == null || GoodsModelList.Count == 0)
                    {
                        responseModel.StatusCode = (int)ActionParams.code_error_null;
                    }
                }
                else
                {
                    responseModel.StatusCode = (int)ActionParams.code_null;
                }

                responseModel.JsonData = GoodsModelList;
            }
            catch (Exception)
            {
                responseModel.StatusCode = (int)ActionParams.code_error;
            }
            JsonSerializerSettings jsonSerializerSettings = new JsonSerializerSettings();

            jsonSerializerSettings.ContractResolver = new LimitPropsContractResolver(new string[] {
                "StatusCode",
                "JsonData",
                "GoodsID",
                "GoodsTitle",
                "GoodsPrice",
                "GoodsSales",
                "GoodsListImage",
                "FileUrlData"
            });
            return(JsonConvert.SerializeObject(responseModel, jsonSerializerSettings));
        }