Question

How can i write a datatable content on web page in XMl foramte in asp.net?
i also need to customize the datatable before writing to web page.
Edited:-

 protected void Page_Load(object sender, EventArgs e)
    {
        Response.ContentType = "text/xml";
        DataTable dt = new DataTable("XML");
        String email = EmailAddress.Text.ToString();
        dt.Load(obj.GetXML("[e-mail]"));
//now i want this dt to dosplayed in the XMl form on the same page, how can i achieve this?
        'XmlDocument xml = new XmlDocument();
        'XmlTextReader xr=new XmlTextReader( 
        'WriteGoogleMap(dt.ToString(), Response.OutputStream);
        'Response.End();
        //System.Xml.
    }

Answer 1

Try this :

    public string GetXml(string urlBase)
    {
        XmlWriterSettings settings = new XmlWriterSettings();
        settings.Encoding = Encoding.UTF8;
        settings.Indent = true;
        StringBuilder output = new StringBuilder();
        using (XmlWriter writer = XmlWriter.Create(output, settings))
        {
            writer.WriteStartDocument();
            writer.WriteStartElement("urlset", "http://www.sitemaps.org/schemas/sitemap/0.9");

            // Repeat this code:
            writer.WriteStartElement("url");
            writer.WriteElementString("loc", "[your url]");
            writer.WriteEndElement();

            writer.WriteEndElement();
            writer.WriteEndDocument();
        }

        return output.ToString();
    }

Then use the result to feed a label :

<script runat="server" type=text/C#>
    protected void Page_Load(object sender, EventArgs e)
    {
        myLabel.Text = HttpUtility.HtmlEncode(
            GetXml("http://www.dotnetperls.com/")    
        );
    }
</script>

[Edit]
I think you should start by the beginning. Do not mix all concepts in your single question. Spend time for learning the basics (read books, take courses, etc.). In your specific case, I suggest you to split the work in several layers:

• A data layer the is responsible to build a datatable
• A business or service layer, capable of creating the xml document from the databable
• A presentation layer that will contains :
  • a custom http handler (.ashx) that will return the xml
  • a visual page that can show the html representation of the Xml

good luck