how to create google sitemap for mvc site?

I used Mike Brind's Sitemap code, with a small change.

You need to add the XNamespace to every XElement, otherwise Google spits the dummy.

Here's my version:

public ContentResult Index()        {            XNamespace ns = "http://www.sitemaps.org/schemas/sitemap/0.9";            const string url = "http://www.website.com/controller/action/{0}";            var items = _db.DataAccessHere();            var sitemap = new XDocument(                new XDeclaration("1.0", "utf-8", "yes"),                new XElement(ns + "urlset",                    from i in items                    select                    //Add ns to every element.                    new XElement(ns + "url",                       new XElement(ns + "loc", string.Format(url, i.ItemID)),                          new XElement(ns + "lastmod", String.Format("{0:yyyy-MM-dd}", i.DateAddedUTC)),                      new XElement(ns + "changefreq", "monthly"),                      new XElement(ns + "priority", "0.5")                      )                    )                  );            return Content(sitemap.ToString(), "text/xml");        }

Credit to Mike for posting the original article and code.

Shameless self plug: I created a library called SimpleMvcSitemap after having weird issues with MvcSiteMapProvider on production. You can serve sitemap files from any action method without any configuration:

public class SitemapController : Controller{    public ActionResult Index()    {        List<SitemapNode> nodes = new List<SitemapNode>        {            new SitemapNode(Url.Action("Index","Home")),            new SitemapNode(Url.Action("About","Home")),            //other nodes        };        return new SitemapProvider().CreateSitemap(nodes);    }}

It also supports all the Google Sitemap extensions available.

The easiest way would be to use any one of a number of free sitemap builders out there - they will crawl your site, follow links, and generate a sitemap XML file for you.

Here's one for example