public string Get_PageInfo_IWantToSupply_List(QueryCommon <IWantToBuyQuery> query)
        {
            if (base.CurrentUser != null)
            {
                query.ParamInfo.PurchaseID = base.CurrentUser.Id;
            }
            Result_Model <PageInfo> resModel = new Result_Model <PageInfo>();

            resModel = iWantToBuyService.Get_PageInfo_IWantToSupply_List(query);
            return(Newtonsoft.Json.JsonConvert.SerializeObject(resModel));
        }