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Answer 1

+1 A:

You seem to need to establish a namespace context on your xpath, or get rid of that xmlns="http://tempuri.org/".

bmargulies 2010-01-29 23:14:18

Does that hold up even if its the default namespace for the entire document?

prodigitalson 2010-01-29 23:16:35

yes, thought to be perfectly sure I'd need to know what XPath package you are using -- or even what language you are in.

bmargulies 2010-01-29 23:22:33

@bmargulies: Interesting, thats not the case when using SimpleXml under PHP - and while im not sure i dont think it matters when using DOMDcoument either... so long as its the default ns for the entire document.

prodigitalson 2010-01-29 23:27:57

i'm using .NET. any idea?

Or A 2010-01-29 23:29:52

this should explain more: http://msdn.microsoft.com/en-us/library/system.xml.xmlnode.selectsinglenode.aspx

prodigitalson 2010-01-29 23:32:52

well, if msdn solution would have worked, i wouldn't post it here...

Or A 2010-01-29 23:41:25

@Or A: Can you post your implementation that uses the MSDN usage example?

prodigitalson 2010-01-29 23:49:04

Answer 2

A:

If messageContent is the root node you should omit it like: /Message[@type] or if you want to check the entire hierarchy of the document: //Message[@type]

prodigitalson 2010-01-29 23:15:42

i tried it both, none worked!

Or A 2010-01-29 23:30:03

Answer 3

A:

NOt a straight forward but will work

XMLElement messageElement = (XMLElement) xmlDoc.SelectSingleNode("/messageContent/Message");
if(messageElement.HasAttribute("type"))

But the thing is if you have a node Message butdoes not contain type attribute then its not proper format of an xml.Rather i would suggest to check the content of the type attribute like below

XMLNode messageElement = xmlDoc.SelectSingleNode("/messageContent/Message[@type='MappedMessage']");
if(messageElement != null)
{
//Do SOmething
}

Ravisha 2010-01-30 04:01:05

Answer 4

+3 A:

There's absolutely nothing wrong with your XML - there's something wrong with your XPath expression, though :-)

Add a XML namespace manager to your code:

XmlNamespaceManager mgr = new XmlNamespaceManager(xdoc.NameTable);
mgr.AddNamespace("ns", "http://tempuri.org/");

and then use that namespace manager when you do your SelectSingleNode:

var messageType = xdoc.SelectSingleNode("/ns:messageContent/ns:Message[@type]", mgr);

That should work.

marc_s 2010-01-30 07:19:24

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