MVC EF IQueryAble 无法获取数据是为什么，小弟求解

int totalCount = 0;//设置分页计数初始值
Expression> where = T => T.Title.Contains(strSearch);
IQueryable lt = LoadPageEntities(pagesize, pagenum, out totalCount, where
, false, D => D.ID);
return Json(new
{
sEcho = param.sEcho,
iTotalRecords = totalCount,
iTotalDisplayRecords = totalCount,
aaData = lt
}, JsonRequestBehavior.AllowGet);