Hi,

Try like this

public void FillGrid()
    {
        try
        {
            DataSet ds = new DataSet();
            ds = Button_Select1(  U can pass ur parameters in this  );
            if (ds.Tables[0].Rows.Count == 0)
            {
                ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());

                Gv1.DataSource = ds;
                Gv1.DataBind();
                Gv1.Rows[0].Visible = false;

            }
            else
            {

                Gv1.DataSource = ds;
                Gv1.DataBind();
                Gv1.Visible = true;
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

And in ur

protected void Gv1_SelectedIndexChanged(object sender, EventArgs e)
    {

Button_Select1(  U can pass ur parameters in this  ); // U can bind thst function...

}

Reply me for any issues..