Devexpress aspxgridview oncustomcallback 无刷新更新数据

  protected void gridView_CustomCallback(object sender, ASPxGridViewCustomCallbackEventArgs e)
        {
            ASPxGridView gridView = sender as ASPxGridView;
            if (e.Parameters=="1")
            {
                    SqlDataSource1.SelectParameters[0].DefaultValue = "1=1";
            }
            else{
            SqlDataSource1.SelectParameters[0].DefaultValue = " PosID=" + e.Parameters;
            }
            gridView.DataBind();
        }