WebService 返回自定义XML

[昙花一现1]

写了一个Web服务，默认返回的是DataSet,可客户要求返回自定义的XML,如下：
<?xml version="1.0" encoding="utf-8"?>
<root>
<item title=" " date=" " price=" " color=" " kilometre=" " collocate=" " linkman=" " tel=" " standbytel=" " dealer=" " address=" " imgurl=" "></item>
</root>

请问该如何使用，本人对XML还不熟悉，希望能够有源代码

[scow]

msdn: xmldocument or xmlwriter

[edzhcom]

/// <summary>
/// anonymous 的摘要说明
/// </summary>
[WebService(Namespace = "http://edzh.com/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Anonymous : System.Web.Services.WebService
{

public XmlDataDocument objXml;
public Anonymous()
{
//如果使用设计的组件，请取消注释以下行
//初始化
objXml = new XmlDataDocument();
objXml.LoadXml("<root />");
XmlElement returnXmlElem = objXml.CreateElement("return");
returnXmlElem.InnerText = "false";
objXml.DocumentElement.AppendChild(returnXmlElem);
XmlElement msgXmlElem = objXml.CreateElement("msg");
msgXmlElem.InnerText = "操作失败";
objXml.DocumentElement.AppendChild(msgXmlElem);
}

/// <summary>
/// ç”Ÿæˆæ–‡ç« é¡µé¢, 404解决方案
/// </summary>
/// <param name="catalogid"></param>
[WebMethod(Description = "ç”Ÿæˆæ–‡ç« é¡µé¢", EnableSession = false)]
public XmlDataDocument CreateArticlePage()
{
HttpRequest request = HttpContext.Current.Request;
Yesun.Edzh.BLL.ArticleService bllArticle = new Yesun.Edzh.BLL.ArticleService();
Yesun.Edzh.BLL.CatalogService bllCatalog = new Yesun.Edzh.BLL.CatalogService();
Yesun.Edzh.BLL.AdService bllAd = new Yesun.Edzh.BLL.AdService();
Guid articleid = Guid.Empty;
if (request.Params["articleid"] != null)
articleid = new Guid(request.Params["articleid"]);
try
{
new ArticleService().CreateArticlePage(articleid);
objXml.SelectSingleNode("/root/return").InnerText = "true";
objXml.SelectSingleNode("/root/msg").InnerText = "操作成功";
}
catch (Exception ex)
{
Yesun.Edzh.BLL.Log.LogHelperService.WriteError(ex.ToString());
objXml.SelectSingleNode("/root/msg").InnerText = ex.Message;
}
return objXml;
}
}