Issue selecting nodes in XML document - Returns NULL

I am parsing an XML document to pull out the first occurrence of "content" node and read the inner text for that node.

The XML file coming in can be seen at:

https://www.googleapis.com/shopping/search/v1/public/products?key=AIzaSyAfaLdRHGKa5Rens--Vpw-KftdzWyxe2co&country=GB&q=5055277014187&alt=atom

The code behind that processes the file is:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestToSend);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader sr = new StreamReader(response.GetResponseStream());
string responseString = sr.ReadToEnd();

XmlDocument thisXmlDoc = new XmlDocument();
thisXmlDoc.LoadXml(responseString);

//get Companies
XmlNodeList ocNodesCompany = thisXmlDoc.SelectNodes("//feed/entry/content");
foreach (XmlElement element in ocNodesCompany)
{
    description = element.InnerText;
    testOutput = "<b>" + stockRow["stockitem_text"].ToString() + "</b>: " + description + "<br /><br />";
    break;
}

Response.Write(responseString + "<br /><br />" + testOutput);

Unfortunately even tho开发者_运维百科ugh the XML file is coming through correctly, it is not finding any nodes and therefore returning NULL and not entering the 'foreach' loop.

Thanks for any help.

---

When using XPath queries for elements that are in some namespace, you have to declare and use namespace prefix.

The following code works:

var nsmgr = new XmlNamespaceManager(new NameTable());
nsmgr.AddNamespace("atom", "http://www.w3.org/2005/Atom");

XmlNodeList ocNodesCompany =
    thisXmlDoc.SelectNodes("/atom:feed/atom:entry/atom:content", nsmgr);

Also, when referring to the root node, you should use / instead of //.

---

You can use thisXmlDoc.GetElementsByTagName("content"); instead of thisXmlDoc.SelectNodes("//feed/entry/content");