private void btnXoaPhong_Click(object sender, EventArgs e) { try { int i = dgvPhong.CurrentCell.RowIndex; Phong p = new Phong(); p.MaPhong = dgvPhong.Rows[i].Cells["MaPhong"].Value.ToString(); dal_phong.XoaPhong(p); dgvPhong.DataSource = dal_phong.ThongTinCacPhong(); MessageBox.Show("Xóa phòng có mã " + p.MaPhong.Trim() + " thành công"); } catch (Exception) { throw; } }