How to get value of element with XDocument and Linq to XML

Question

I want to collect the RequestID element with the namespace, but I do not know how.

this.XmlString =  "<?xml version=\"1.0\" 
encoding=\"utf-8\"?><MethodNameRq xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" 
xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><RequestID 
xmlns=\"http://Mynamespace\">573-348976-428697-346</RequestID ></MethodNameRq>";

var doc = XDocument.Parse(this.XmlString);

this.RequestId = (string)doc.Descendants().Where(n => n.Name 
                 == "RequestID ").FirstOrDefault();

This collects an empty string for RequestID . It does work if the string has no namespaces included. Does anyone know how I can collect the RequestID element?

Answer 1

you need to specify the namespace of your element

XNamespace ns = "http://Mynamespace";

this.RequestId = (string)doc.Descendants(ns + "RequestID").FirstOrDefault();