public IEnumerable<NGANH_SearchResult> NGANH_Search(NGANH_SearchResult data, int? top) { try { using (var db = new OOAD_EDUManagementDataContext()) { return db.NGANH_Search(data.maNganh, data.maXNganh, data.maLoaiHinhDaoTao, data.tenNganh, data.maNguoiLap, data.thoiGianLap == null ? "" : data.thoiGianLap.Value.ToString(Constants.FormatDate), data.maNguoiDuyet, data.thoiGianDuyet == null ? "" : data.thoiGianDuyet.Value.ToString(Constants.FormatDate), data.maTrangThaiDuyet, data.trangThaiDuLieu, top).ToList(); } } catch (Exception e) { return null; } }