Problem with XPath 'substring' function

[pnunbe]

Hi,

I have a problem with the 'substring' function of XPath in VB.NET (VS 2005).

My code looks like this:

  dim Dom As new XmlDocument
    Dim mgr As New XmlNamespaceManager(Dom.NameTable)
   'mgr.AddNamespace("fn", "http://www.w3.org/2005/xpath-functions/#substring")
   mgr.AddNamespace("fn", "http://www.w3.org/2005/xpath-functions")
    Dom.Load(fileXml)
   Dim nodeList As XmlNodeList
   Dim root As XmlNode = Dom.DocumentElement
   nodeList = root.SelectNodes("//*[fn:substring(@MittDest,1,1)='a']", mgr)

I get the following message (translated from italian)

"XsltContex t is necessary for the query due to an unknown function."

Neither of the two AddNameSpace statements works.

Any suggestions?

Thanks

[Dormilich]

does it work without the "fn" namespace? (I only used XPath functions in XSLT, but there I didn’t need a namespace)

[pnunbe]

does it work without the "fn" namespace? (I only used XPath functions in XSLT, but there I didn’t need a namespace)

Yes, it does work!

Thanks a lot