XmlNamespaceManager, default namespaces, nested qualified namespace, xpath problem.

[Oisin Grehan]

Hi,
I can't for the life of me get this to work properly. I've searched for
examples, but none of the examples quite match my environment. Here is my
XML (please treat this as immutable -- no solutions involving altering the
XML are good for me):

---- config.xml ----

<Configuration
xmlns="urn:server:schemas:configuration"
xmlns:f="urn:server:schemas:faq">
<version version="0.0.0001">
<f:faq>
<f:section>Default</f:section>
<f:item>
<f:q>What is the meaning of life?</f:q>
<f:a>42.</f:a>
</f:item>
</f:faq>
</version>
</Configuration>

I want to have an XmlNode object referencing the first <faq> tag. Here is
the corresponding c# code:

XmlDocument xd = new XmlDocument();
xd.Load("config.xml");
XmlNamespaceManager xnm = new XmlNamespaceManager(xd.NameTable);
xnm.AddNamespace(String.Empty, "urn:server:schemas:configuration");
xnm.AddNamespace("f", "urn:server:schemas:faq"); // faq container namespace
XmlNode xnFaq = xd.SelectSingleNode(

"/Configuration/version[@version=\"0.0.0001\"]/f:faq[f:section=\"Default\"]"
, xnm);

This fails to select the f:faq node. I've tried using the following also:

xnm.AddNamespace("c", "urn:server:schemas:configuration");
xnm.AddNamespace("f", "urn:server:schemas:faq"); // faq container namespace
XmlNode xnFaq = xd.SelectSingleNode(

"/c:Configuration/c:version[@c:version=\"0.0.0001\"]/f:faq[f:section=\"Defau
lt\"]", xnm);

I'm beginning to lose the mind here people; any ideas? Cheers!

- Oisin

[Oisin Grehan]

"Steven Livingstone" <s.***********@nospam.btinternet.com> wrote in message
news:%2****************@TK2MSFTNGP11.phx.gbl...

Have you tried this?

XmlNode xnFaq = xd.SelectSingleNode(

"/Configuration/version[@version='0.0.0001']/f:faq[f:section='Default']"
, xnm);

?

Nope, that's not it. If I strip the default namespace declaration out of the
xml, e.g. the root tag is just <Configuration>, everything works fine. But
like I mentioned, this is not an option for me. Thanks for the try anyway.

- Oisin

[Oisin Grehan]

Right -- for the benefit of the rest of the group, the problem was in the
XPath query;

if should have been:

/c:Configuration/c:version[@version=\"0.0.0001\"] ...

instead of

/c:Configuration/c:version[@c:version=\"0.0.0001\"] ...

I was qualifying the attribute with a namespace prefix and I didn't need to.
Guess I'd better read up a little more on schema defaults :)

- Oisin

"Oisin Grehan" <oi****@nospam.iol.ie.> wrote in message
news:eE**************@TK2MSFTNGP11.phx.gbl...

Hi,

<snip />

[Steven Livingstone]

ok, with the c prefix try.. (sorry not to take more time but i'm rushed of
my feet for the next couple of hours!)

"/c:Configuration/c:version[@version='0.0.0001']/f:faq[f:section='Default']"
, xnm);
"Oisin Grehan" <oi****@nospam.iol.ie.> wrote in message
news:#K**************@TK2MSFTNGP10.phx.gbl...

"Steven Livingstone" <s.***********@nospam.btinternet.com> wrote in message news:%2****************@TK2MSFTNGP11.phx.gbl...

Have you tried this?

XmlNode xnFaq = xd.SelectSingleNode(

"/Configuration/version[@version='0.0.0001']/f:faq[f:section='Default']"
, xnm);

?
Nope, that's not it. If I strip the default namespace declaration out of

the xml, e.g. the root tag is just <Configuration>, everything works fine. But
like I mentioned, this is not an option for me. Thanks for the try anyway.

- Oisin