private void DeleteRow(int indexRow)
{
string maCanHo = gridView1.GetRowCellValue(indexRow, "Mã căn hộ").ToString().Trim();
string maDichVu = gridView1.GetRowCellValue(indexRow, "Mã dịch vụ").ToString().Trim();
context.xoaCanHoDichVu(maCanHo, maDichVu);
}