XDocument.Element returns null when parsing an xml string

Question

I have this xml string:

Answer 1

var xDoc = XDocument.Load(filename);
XNamespace ns = "http://schemas.zune.net/catalog/apps/2008/02";
var prices = xDoc
                .Descendants(ns + "offer")
                .Select(o => (decimal)o.Element(ns + "price"))
                .ToList();

Answer 2

Here is correct way to get prices:

var xdoc = XDocument.Parse(xmlString);
XNamespace ns = xdoc.Root.GetDefaultNamespace();

var pricres = from o in xdoc.Root.Elements(ns + "offers").Elements(ns + "offer")
              select (int)o.Element(ns + "price");

Keep in mind that your document have default namespace, and a is also namespace.

Answer 3

Get the namespace somehow, like

XNameSpace a = doc.Root.GetDefaultNamespace();

or, probably better:

XNameSpace a = doc.Root.GetNamespaceOfPrefix("a");

and then use it in your queries:

// to get <a:feed>
XElement f = doc.Element(a + "feed");

You can also set the namespace from a literal string, but then avoid var.

Answer 4

a is a namespace. To get the feed element try this:

XDocument doc = XDocument.Parse(xmlString);
XNamespace a = "http://www.w3.org/2005/Atom";
var feed = doc.Element(a + "feed");