public DataTable TimKiemTheoTen(string input) { DataTable dt = sinhVienDAO.Search().Copy(); DataTable ketqua = new DataTable(); ketqua.Columns.Add("MaSV"); ketqua.Columns.Add("HoTen"); ketqua.Columns.Add("NgaySinh"); ketqua.Columns.Add("GioiTinh"); ketqua.Columns.Add("Sdt"); ketqua.Columns.Add("MaLop"); for (int r = 0; r < dt.Rows.Count; r++) { string hoten = dt.Rows[r]["HoTen"].ToString(); if (hoten.ToLower().Contains(input.ToLower())) { DataRow row = dt.Rows[r]; DataRow newrow = ketqua.NewRow(); for (int i = 0; i < ketqua.Columns.Count; i++) { newrow[i] = row[i]; } ketqua.Rows.Add(newrow); } } return(ketqua); }