public string IWantToBuyAdd(QueryCommon <IWantToBuyQuery> query)
        {
            DateTime now = DateTime.Now;

            query.ParamInfo.PurchaseID  = base.CurrentUser.Id;
            query.ParamInfo.CreateDate  = DateTime.Now;
            query.ParamInfo.UpdateDate  = DateTime.Now;
            query.ParamInfo.StartDate   = DateTime.Now;
            query.ParamInfo.EndDate     = DateTime.Now;
            query.ParamInfo.PurchaseNum = GetPurchaseNum();
            query.ParamInfo.Status      = 0;

            Result_Msg res = iWantToBuyService.IWantToBuy_Add_Web(query);

            return(Newtonsoft.Json.JsonConvert.SerializeObject(res));
        }