Need to set focus to page_load from a routine

catch (Exception ex)
            {
                lblstatus.Text = ex.Message;
            }
            finally
            {
                SqlDataAdapter daa = new SqlDataAdapter("select * from GRADBULD ORDER BY CODE1", sqlCon);
                DataSet dsas = new DataSet();
                daa.Fill(dsas, "GRADBULD");
                GridView1.DataSourceID = "SqlDataSource1";
                GridView1.DataBind();
                sqlCon.Close();

                btn_Add.Enabled = true;

            }


            ///DELETE END
        }