private void btnTimKiemNhanh_Click(object sender, EventArgs e) { BLPDP = new BLPhieuDatPhong(); DTPDP = new DataTable(); DTPDP.Clear(); DataSet ds = new DataSet(); ds = BLPDP.TimKiemNhanh(txtTimKiem.Text); DTPDP = ds.Tables[0]; dgv_DatPhong.DataSource = DTPDP; }