/// <summary>
/// 压缩html代码
/// </summary>
/// <param name="writer"></param>
protected override void Render(HtmlTextWriter writer)
{
  System.IO.StringWriter html = new System.IO.StringWriter();
  HtmlTextWriter tw = new HtmlTextWriter(html);
  base.Render(tw);
  string outhtml = html.ToString();
  outhtml = System.Text.RegularExpressions.Regex.Replace(outhtml, "\\n+\\s+", string.Empty);
  outhtml = outhtml.Trim();
  writer.Write(outhtml);
}

protected override void Render(HtmlTextWriter writer)
{
  System.IO.StringWriter html = new System.IO.StringWriter();
  HtmlTextWriter tw = new HtmlTextWriter(html);
  base.Render(tw);
  string outhtml = html.ToString();
  outhtml = System.Text.RegularExpressions.Regex.Replace(outhtml, "<input\\stype=\"hidden\"\\sname=\"__VIEWSTATE\"\\sid=\"__VIEWSTATE\" value=\".+\\/>", string.Empty);
  outhtml = outhtml.Trim();
  writer.Write(outhtml);
}