/// <summary>
/// Xóa khuyến mại
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn_XoaKM_Click(object sender, EventArgs e)
{
KhuyenMaiBLL km = new KhuyenMaiBLL();
km.deleteKM(Makm);
loadKM();
}
