public List <GetListBCDoanhThu_Result> GetListHoaDon(DateTime dateFrom, DateTime dateTo) { try{ using (var db = new QLPhongKaraokeEntities()) { IEnumerable <GetListBCDoanhThu_Result> query = db.GetListBCDoanhThu(dateFrom, dateTo); return(query.ToList()); } } catch { return(null); } }