ASPX页面到HTML转换及保存方法

protected override void Render(HtmlTextWriter writer)
    {
        string htmlname = Request.QueryString["po"] as string;
        string fileName = string.Empty;

        string content = string.Empty;
        System.IO.StringWriter stringWriter = new System.IO.StringWriter();
        HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter);
        System.IO.StreamWriter sw = null;
        try
        {
            // 将当前页面的内容呈现到临时的 HtmlTextWriter 对象中  
            base.Render(htmlWriter);
            htmlWriter.Close();
            // 得到当前页面的全部内容  
            content = stringWriter.ToString();
            fileName = htmlname + ".html";
            //sw = new StreamWriter(Server.MapPath("htm/") + fileName, false, code);
            //sw.Write(str);
            //sw.Flush();
            //System.IO.StringWriter creaObj = new System.IO.StringWriter(Server.MapPath("html/") + fileName, false, content);

            string path = HttpContext.Current.Server.MapPath("Upload/");

            System.Text.Encoding code = System.Text.Encoding.GetEncoding("utf-8");
            sw = new System.IO.StreamWriter(path + fileName, false, code);
            //sw = new System.IO.StreamWriter(fileName, false, code);
            sw.Write(content);
            sw.Flush();
            Response.Write(content);