Gridview Checkbox

 protected void Button1_Click(object sender, EventArgs e)

    {

        foreach (GridViewRow grow in GridView1.Rows)

        {

            //Searching CheckBox("chkDel") in an individual row of Grid  

            CheckBox chkdel = (CheckBox)grow.FindControl("ch");

            //If CheckBox is checked than delete the record with particular empid  

            if (chkdel.Checked)

            {

                int id = Convert.ToInt32(grow.Cells[0].Text);

                DeleteRecord(id);

            }

        }