public static FileLuyenTapDTO LayFileLuyenTapTheoMa(string strMaBaiHoc) { try { FileLuyenTapDTO KetQua = new FileLuyenTapDTO(); DataTable BaiHoc = FileLuyenTapDAO.LayFileLuyenTapTheoMa(strMaBaiHoc); if (BaiHoc.Rows.Count > 0) { KetQua.Ma = BaiHoc.Rows[0]["Ma"].ToString(); KetQua.MaBaiHoc = BaiHoc.Rows[0]["MaBaiHoc"].ToString(); KetQua.LoaiFileLuyenTap = BaiHoc.Rows[0]["LoaiFile"].ToString(); KetQua.FileDapAn = BaiHoc.Rows[0]["FileDapAn"].ToString(); KetQua.FileNoiDung = BaiHoc.Rows[0]["FileNoiDung"].ToString(); } return(KetQua); } catch (Exception) { return(null); } }