Do XmlNode's have a unique internal system ID?

[nntp1.sympatico.ca]

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,
Rich

[Pascal Schmitt]

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.
--
Pascal Schmitt

[Dimitre Novatchev]

"Pascal Schmitt" <ne*******@cebra.nu> wrote in message
news:%2****************@TK2MSFTNGP15.phx.gbl...

Hello!

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

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.

[Pascal Schmitt]

Hello!

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

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.

Oh, sorry :S

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

--
Pascal Schmitt