How to XPath this SOAP Response?

[Cal]

When I call calloperation on a WCF web service and use //DoubleValue I receive a null exception (but I can see this XML response coming back):

<s:Body>
  <SumResponse xmlns="http://tempuri.org/">
     <SumResult xmlns:a="http://schemas.datacontract.org/2004/07/GettingStartedLib"         xmlns:i="http://www.w3.org/2001/XMLSchema-isntance">
          <a:DoubleValue>3</a:DoubleValue>
          <a:SomeInt>7</a:SomeInt>
          <a:StringValue>Hello</a:StringValue>

[bbruyn]

Course this is not the best place to post a question like that, but you seem to be trying to ignore your namespaces.

You could just change your expression to something like

//*[local-name()='DoubleValue']

Or better yet, try here.

[Cal]

That did the trick, thank you very much.