asp.net静态化html时不输出__VIEWSTATE

 protected override void Render(HtmlTextWriter writer)
    { 
        StringWriter sw = new StringWriter();           
        HtmlTextWriter htmlw = new HtmlTextWriter(sw);           
        //把页面生成内容拿出来           
        base.Render(htmlw);           
        htmlw.Flush();           
        htmlw.Close();
        string pageContent = sw.ToString();      
        string pattern=@"\<input type=""hidden"" name=""__VIEWSTATE""[^\>]*\>";
        pageContent = Regex.Replace(pageContent, pattern, string.Empty, RegexOptions.IgnoreCase | RegexOptions.Multiline);
 
        Response.Write(pageContent);         
  
    }