LINQ to XML getting XElement values

Question

I am having an issue with getting some values back from LINQ to XML query. I have got the XML from a SOAP web service and passed this through and parsed this into an XDocument

Answer 1

This is what's causing you the headache:

xmlns="http://webservices.whitespacews.com/"

That's setting the default namespace for the element and its descendants - so you need to look for elements with a local name of Collections and that namespace. Ditto the other elements. Fortunately, LINQ to XML makes that easy for you:

XNamespace ns = "http://webservices.whitespacews.com/";
...
var test = xmlDoc.Descendants(ns + "Collection")
                 .Select(x => new
                 {
                     day = x.Element(ns + "Day").Value,
                     date = x.Element(ns + "Date").Value
                 });

I suspect your test2 collection would have elements, but because it won't be able to find the Day and Date elements, so fetching the Value property will result in a NullReferenceException.

Also note that there's no need for you to create your own reader etc. I would write your code as:

XNamespace ns = "http://webservices.whitespacews.com/";
XDocument doc;
using (var stream = response.GetResponseStream())
{
    doc = XDocument.Load(stream);
}
var query = xmlDoc.Descendants(ns + "Collection")
                  .Select(x => new
                  {
                      Day = x.Element(ns + "Day").Value,
                      Date = x.Element(ns + "Date").Value
                  });