protected override void Render( HtmlTextWriter writer )
  {
    System.IO.StringWriter html = new System.IO.StringWriter();
    System.Web.UI.HtmlTextWriter tw = new System.Web.UI.HtmlTextWriter(html);
    base.Render(tw);
    System.IO.StreamWriter sw;
    sw = new System.IO.StreamWriter(Server.MapPath("a.htm"), false, System.Text.Encoding.Default);
    sw.Write(html.ToString());
    sw.Close();
    tw.Close();
    Response.Write(html.ToString());
  }

------解决方案--------------------
如果有成功demo的话发一下给我参考一下,谢谢!     hubeiliuyaping@sina.com