Convert c# HtmlTextWriter page into simple asp.net

Question

I got an old showxml web page which is written using HtmlTextWriter. I don't have enough experience working with HtmlTextWriter method and I have some problems to control it. I need xsl, xml, js, with their Ids. Because page elements control each other with their IDs. So I wanted to convert that into simple asp.net page. What is the way to do so? Below is my code:

<%@ Page Language="C#" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>

<script language="C#" runat="server">
protected override void Render(HtmlTextWriter writer)
{
    Response.Buffer = true;
    Response.ContentEncoding = Encoding.UTF8;

    String number_appl = "20170001";
    String objIntel = "marks";
    String username;
    username = User.Identity.Name;

    writer.WriteFullBeginTag("html");
    writer.WriteLine();

    writer.WriteBeginTag("meta");
    writer.WriteAttribute("http-equiv", "Content-Type");
    writer.WriteAttribute("content", "text/html; charset=utf-8");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteLine();

    writer.WriteBeginTag("xml");
    writer.WriteAttribute("id", "template");
    writer.WriteAttribute("src", "/edit/source.aspx?objIntel=" + objIntel + "&filename=template.xml&un=");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("xml");
    writer.WriteLine();

    writer.WriteBeginTag("xml");
    writer.WriteAttribute("id", "data");
    writer.WriteAttribute("src", "/edit/source.aspx?objIntel=DataBase\\" + objIntel + "&filename=\\xmls\\" + number_appl + ".xml&un=" + username);
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("xml");
    writer.WriteLine();

    writer.WriteBeginTag("xml");
    writer.WriteAttribute("id", "style");
    writer.WriteAttribute("src", "/edit/source.aspx?objIntel=" + objIntel + "&filename=b7b.xsl&un=" + username);
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("xml");
    writer.WriteLine();

    writer.WriteBeginTag("xml");
    writer.WriteAttribute("id", "xmlerror");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteBeginTag("XMLDATA");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("XMLDATA");
    writer.WriteEndTag("xml");
    writer.WriteLine();

    writer.WriteBeginTag("LINK");
    writer.WriteAttribute("REL", "STYLESHEET");
    writer.WriteAttribute("HREF", "/edit/styles.css");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("LINK");
    writer.WriteLine();

    writer.WriteBeginTag("script");
    writer.WriteAttribute("language", "JScript");
    writer.WriteAttribute("src", "/edit/source.aspx?objIntel=" + objIntel + "&filename=showxml.js");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("script");
    writer.WriteLine();
    writer.WriteBeginTag("TITLE");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.Write(number_appl);
    writer.WriteEndTag("TITLE");
    writer.WriteLine();

    writer.WriteBeginTag("body");
    writer.WriteAttribute("alink", "#006666");
    writer.WriteAttribute("Link", "#006666");
    writer.WriteAttribute("Vlink", "#006666");
    writer.WriteAttribute("bgcolor", "#f0fff0");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteLine();

    writer.WriteBeginTag("DIV");
    writer.WriteAttribute("id", "showResult");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("DIV");
    writer.WriteLine();

    writer.WriteBeginTag("FORM");
    writer.WriteAttribute("ENCTYPE=", "multipart/form-data");
    writer.WriteAttribute("action", "savexml.aspx?un=" + username);
    writer.WriteAttribute("method", "POST");

    writer.WriteAttribute("name", "FORM1");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteBeginTag("INPUT");
    writer.WriteAttribute("type", "submit");
    writer.WriteAttribute("name", "Enter");
    writer.WriteAttribute("value", "Зафиксировать изменения");
    writer.WriteAttribute("onClick", "achSendDataToServer()");
    writer.WriteEndTag("INPUT");
    writer.WriteBeginTag("INPUT");
    writer.WriteAttribute("type", "hidden");
    writer.WriteAttribute("name", "blob");
    writer.WriteAttribute("value", "blob_xml");
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("INPUT");
    writer.WriteBeginTag("INPUT");
    writer.WriteAttribute("type", "hidden");
    writer.WriteAttribute("name", "appl_number");
    writer.WriteAttribute("value", number_appl);
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("INPUT");
    writer.WriteBeginTag("INPUT");
    writer.WriteAttribute("type", "hidden");
    writer.WriteAttribute("name", "vid");
    writer.WriteAttribute("value", objIntel);
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("INPUT");
    writer.WriteBeginTag("INPUT");
    writer.WriteAttribute("type", "hidden");
    writer.WriteAttribute("name", "un");
    writer.WriteAttribute("value", username);
    writer.Write(HtmlTextWriter.TagRightChar);
    writer.WriteEndTag("INPUT");
    writer.WriteEndTag("FORM");
    writer.WriteLine();

    writer.Write("<?xml version=\"1.0\" encoding=\"utf-8\"?> <user name=\"u_name\"> </user>");


    writer.WriteEndTag("body");
    writer.WriteLine();
    writer.WriteEndTag("html");

}

</script>

Answer 1

The translation isn't that hard to make, for instance :

writer.WriteBeginTag("DIV");
writer.WriteAttribute("id", "showResult");
writer.Write(HtmlTextWriter.TagRightChar);
writer.WriteEndTag("DIV");
writer.WriteLine();

results in

<div id="showResult"></div>

because :

WriteBeginTag("DIV"); writes a <div

Then we get writer.WriteAttribute("id", "showResult");

WriteAttribute adds an attribute with a value, in this case the attribute name is "id", and the value is "showResult"

writer.Write(HtmlTextWriter.TagRightChar); then writes the >, at then end of the open <div tag we had, so we then have <div id="showResult">

All that is left then is to close the tag, which is done with writer.WriteEndTag("DIV");. (This adds the </div>)

Keeping that logic in mind, you should have no trouble translating this code to a decent aspx page.