EDIT 1:
It seems that you may lose some of the xml specific header files:
This might also be a valid example on how to create an xml site map:
Sitemap xml for googleAnother example
OPTION1Try this code out(taken from here):
[WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] public class Sitemap : IHttpHandler { private const string NAMESPACE = "http://www.sitemaps.org/schemas/sitemap/0.9"; public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/xml"; XmlDocument sitemapDocument = GetSitemapDocument(); context.Response.Write(sitemapDocument.InnerXml); } #region Build sitemap document methods private XmlDocument GetSitemapDocument() { XmlDocument sitemapDocument = new XmlDocument(); sitemapDocument.PreserveWhitespace = true; XmlDeclaration xmlDeclaration = sitemapDocument.CreateXmlDeclaration("1.0", "UTF-8", string.Empty); sitemapDocument.AppendChild(xmlDeclaration); XmlElement urlset = sitemapDocument.CreateElement("urlset", NAMESPACE); sitemapDocument.AppendChild(urlset); List<SitemapPage> urls = GetSitemapPages(); foreach (SitemapPage sitemapPage in urls) { XmlElement url = CreateUrlElement(sitemapDocument, sitemapPage); urlset.AppendChild(url); } return sitemapDocument; } private XmlElement CreateUrlElement(XmlDocument sitemapDocument, SitemapPage sitemapPage) { XmlElement url = sitemapDocument.CreateElement("url", NAMESPACE); XmlElement loc = CreateElementWithText(sitemapDocument, "loc", sitemapPage.Location); url.AppendChild(loc); if (sitemapPage.LastModificationDate.HasValue) { //lastmod must be a string that comforms to the W3C Datetime format string lastModValue = sitemapPage.LastModificationDate.Value.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"); XmlElement lastmod = CreateElementWithText( sitemapDocument, "lastmod", lastModValue); url.AppendChild(lastmod); } if (!string.IsNullOrEmpty(sitemapPage.ChangeFrequency)) { XmlElement changefreq = CreateElementWithText(sitemapDocument, "changefreq", sitemapPage.ChangeFrequency); url.AppendChild(changefreq); } if (sitemapPage.Priority.HasValue) { XmlElement priority = CreateElementWithText(sitemapDocument,"priority", sitemapPage.Priority.Value.ToString( CultureInfo.CreateSpecificCulture("en-US"))); url.AppendChild(priority); } return url; } private XmlElement CreateElementWithText( XmlDocument document, string elementName, string text) { XmlElement element = document.CreateElement(elementName, NAMESPACE); XmlText elementValue = document.CreateTextNode(text); element.AppendChild(elementValue); return element; } #endregion private List<SitemapPage> GetSitemapPages() { List<SitemapPage> sitemapPages = new List<SitemapPage>(); //Example implementation sitemapPages.Add(new SitemapPage("http://www.mydomain.com") { ChangeFrequency = "daily", LastModificationDate = DateTime.Now, Priority = 1f }); sitemapPages.Add(new SitemapPage("http://www.mydomain.com/aPage.aspx") { ChangeFrequency = "daily", LastModificationDate = DateTime.Now, Priority = 0.8f }); return sitemapPages; } private class SitemapPage { public SitemapPage(string location) { Location = location; } public string Location { get; private set; } public DateTime? LastModificationDate { get; set; } public string ChangeFrequency { get; set; } public float? Priority { get; set; } } public bool IsReusable { get { return true; } } }OPTION2: According to MSDN this is a valid sitemap: sitemap MSDN.
Check this output out:
<siteMap><siteMapNode title="Home" description="Home" url="~/default.aspx"><siteMapNode title="Products" description="Our products" url="~/Products.aspx"><siteMapNode title="Hardware" description="Hardware choices" url="~/Hardware.aspx" /><siteMapNode title="Software" description="Software choices" url="~/Software.aspx" /></siteMapNode><siteMapNode title="Services" description="Services we offer" url="~/Services.aspx"><siteMapNode title="Training" description="Training classes" url="~/Training.aspx" /><siteMapNode title="Consulting" description="Consulting services" url="~/Consulting.aspx" /><siteMapNode title="Support" description="Supports plans" url="~/Support.aspx" /></siteMapNode></siteMapNode></siteMap>Maybe you should try change your code:
public class XmlSitemapResult : ActionResult{ private XNamespace nsSitemap = "http://www.sitemaps.org/schemas/sitemap/0.9"; private XNamespace nsXhtml = "http://www.w3.org/1999/xhtml"; private IEnumerable<SitemapItem> _items; public XmlSitemapResult(IEnumerable<SitemapItem> items) { _items = items; } public override void ExecuteResult(ControllerContext context) { string encoding = context.HttpContext.Response.ContentEncoding.WebName; XDocument sitemap = new XDocument(new XDeclaration("1.0", encoding, "yes"), new XElement(nsSitemap +"siteMap", new XAttribute(XNamespace.Xmlns +"xhtml", nsXhtml), from item in _items select CreateItemElement(item) ) ); context.HttpContext.Response.ContentType = "application/xml"; context.HttpContext.Response.Charset = encoding; context.HttpContext.Response.Flush(); context.HttpContext.Response.Write(sitemap.Declaration + sitemap.ToString()); } private XElement CreateItemElement(SitemapItem item) { XElement itemElement = new XElement(nsSitemap +"siteMapNode", new XElement(nsSitemap +"loc", item.Url.ToLower())); if (item.LastModified.HasValue) itemElement.Add(new XElement(nsSitemap +"lastmod", item.LastModified.Value.ToString("yyyy-MM-dd"))); if (item.ChangeFrequency.HasValue) itemElement.Add(new XElement(nsSitemap +"changefreq", item.ChangeFrequency.Value.ToString().ToLower())); if (item.Priority.HasValue) itemElement.Add(new XElement(nsSitemap +"priority", item.Priority.Value.ToString(CultureInfo.InvariantCulture))); foreach (var alternateLink in item.AlternateLinks) { itemElement.Add(new XElement(nsXhtml +"link", new XAttribute("rel", "alternate"), new XAttribute("hreflang", alternateLink.Language), new XAttribute("href", alternateLink.Url))); } return itemElement; }}