how to delete data from grid view to select check box in win form application

private void btnDeactivate_Click(object sender, EventArgs e)
{
    if (btnDeactivate.Text == "Deactivate")
    {
        tbCardName.Enabled = false;
        tbCardDescrptn.Enabled = false;
        btnDeactivate.Text = "Activate";


        objCardType.CardName=tbCardName.Text;
        objCardType.CardDescription=tbCardDescrptn.Text;
         int t =objCardType.DeleteUpdate();
         if (t > 0)
         {
             lblOutPut.Text = "Deleted";

         }
    }