public string GetBrandByMainComList(FormCollection FC)
        {
            //定义查询参数
            int PageIndex = 1;
            int PageSize  = 30;

            string Keyword = string.Empty;

            try
            {
                PageIndex = Convert.ToInt32(Request.QueryString["PageIndex"]);
                if (PageIndex <= 0)
                {
                    PageIndex = 1;
                }
            }
            catch
            {
                PageIndex = 1;
            }

            try
            {
                PageSize = Convert.ToInt32(Request.QueryString["PageSize"]);
                if (PageSize <= 0)
                {
                    PageSize = 30;
                }
            }
            catch
            {
                PageSize = 30;
            }

            try
            {
                Keyword = Request.QueryString["Keyword"].Trim();
            }
            catch
            {
                Keyword = string.Empty;
            }


            int TotalRecord                  = 0;
            List <BrandByMainCom>  ML        = IC.GetBrandByMainComList(PageIndex, PageSize, out TotalRecord, Keyword).ToList();
            BrandByMainComPageList MPageList = new BrandByMainComPageList();

            MPageList.TotalRecord = TotalRecord;
            MPageList.PageIndex   = PageIndex;
            MPageList.PageSize    = PageSize;
            MPageList.Rows        = ML;
            return(JsonConvert.SerializeObject(MPageList));
        }