Hello all,

Do System.Xml.XmlNode's have a unique system ID available via a
property somehow?

I have nodes which may be very similar or even identical (but in
different locations) in a document and need to be able to look them up
via this ID. I have for now assigned my own GUID to each node, and can
use XPATH to grab the node I need, but I'm sure the DOM objects must
have something internal I could use instead and be much more efficient.

Many thanks for any help - have a super evening!

Cheers,

Hello!

You can use XPath's generate-id() function which will return an unique
ID for a given node.

XmlDocument a = new XmlDocument();
a.Load("c:\foo.xml");
XmlDocument b = new XmlDocument();
b.Load("c:\foo.xml");

a.CreateNavigator().Evaluate("generate-id(/root/element[1])");
b.CreateNavigator().Evaluate("generate-id(/root/element[1])");

This will maybe not return the same value.


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Hello!

[quoted text, click to view]

Oh, sorry :S

That's why I didn't find anything about it in the XPath Spec..., thanks.

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[quoted text, click to view]

The generate-id() function is only available to XPath in a context
established by XSLT. Trying to evaluate in a non-XSLT context an XPath
expression containing generate-id() results in an error, due to this
function not being recognised.

Cheers,
Dimitre Novatchev.