protected void lnkdelete_Click(object sender, EventArgs e)
    {
        LinkButton  lnkbtndel      = sender as LinkButton;
        GridViewRow gdrow          = lnkbtndel.NamingContainer as GridViewRow;
        int         rowIndex       = gdrow.RowIndex;
        Label       appointmentid  = GridView1.Rows[rowIndex].FindControl("ID2") as Label;
        string      appointmentid1 = appointmentid.Text;
        int         appointmentid2 = Convert.ToInt32(appointmentid1);
        // int appointmentid = Convert.ToInt32(GridView1.DataKeys[gdrow.RowIndex].Value.ToString());
        int result = obj.CancelAppointment(appointmentid2);

        if (result > 0)
        {
            binddata();
        }
        else
        {
        }
    }