怎么从数据库里面的数据显示在页面上是XML格式的？做API接口是这样么

如何从数据库里面的数据显示在页面上是XML格式的？做API接口是这样么？
.net开发，我现在要做一个API接口，要把数据库取出来的值显示成XML格式在页面上面，请各位大侠帮帮忙~！

[解决办法]
http://blog.csdn.net/greatfeather/article/details/2585701
[解决办法]
简单的XML输出

C# code

using System;using System.Collections.Generic;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Xml;using System.IO;using System.Text;public partial class Ajax_check_etao :PowerEasy.SiteFactory.Web.UI.BasePage{    public XmlTextWriter XmlResponseWriter;     protected void Page_Load(object sender, EventArgs e)    {        base.Response.Clear();        base.Response.Buffer = true;        base.Response.Charset = "utf-8";        base.Response.AddHeader("contenttype", "text/xml");        base.Response.ContentEncoding = Encoding.GetEncoding("utf-8");        base.Response.ContentType = "text/xml";        XmlTextWriter writer = new XmlTextWriter(HttpContext.Current.Response.OutputStream, Encoding.UTF8);        writer.Formatting = Formatting.Indented;        writer.Indentation = 4;        this.XmlResponseWriter = writer;        this.XmlResponseWriter.WriteStartDocument();        this.XmlResponseWriter.WriteStartElement("root", "");        XmlTextWriter XmlResponseWriter = new XmlTextWriter(HttpContext.Current.Response.OutputStream, Encoding.UTF8);        if (Session["etao_name"] == null || Session["etao_name"].ToString()=="")        {            this.XmlResponseWriter.WriteElementString("status", "no");        }        else        {            this.XmlResponseWriter.WriteElementString("status", "yes");            this.XmlResponseWriter.WriteElementString("username", Session["etao_name"].ToString());        }        this.XmlResponseWriter.WriteEndElement();        this.XmlResponseWriter.WriteEndDocument();        this.XmlResponseWriter.Close();        base.Response.End();        return;    }}