解决VS2005下无法导出到EXCEL的问题

在VS2003经常会以以下代码来导出内容到EXCEL
        Response.ClearContent();
        Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");
        Response.ContentType = "application/excel";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        MyControl.RenderControl(htw);
        Response.Write(sw.ToString());
        Response.End();
但到了VS2005时却不成功了，如果重载VerifyRenderingInServerForm函数，即可

    public override void VerifyRenderingInServerForm(Control control)
    {

    }

此时系统不再提示对象不在Runat=Server之类的错误。