XML namespace specified and can't find element

[Michal Januszczyk]

I have a very simple XML document.
<SmtpGatewayRules xmlns="http://www.foo.com/schema.xsd">
<rules>
<rule>
</rule>
</rules>
</SmtpGatewayRules>

When no xmlns is specified I can find rule element
with calling: SelectSingleNode("//rule");
But when namespace is specified as in the enclosed example
no node is found. Actually no element can be found in the
entire document when explicit name of it is specified.

However, when calling
SelectNodes("//*").Count
it returns 3 (correct).
What should I do to to find the element with XPath ?
should I prefix the XPath statement with namespace name
(but how, since this is a default namespace)
Or maybe should I use XmlNamespaceManager class when
calling the SelectSingleNode(XPath,namespaceManager)... ?

I tried the second option but this did not help.
I used the following code:

XmlNamespaceManager nm=new XmlNamespaceManager
(xmlDoc.NameTable);
nm.AddNamespace("","http://www.foo.com/schema.xsd");
XmlNode node = doc.SelectSingleNode("//rule",nm);

//node is still null :-(

Thanks for help
Michal Januszczyk

[Oleg Tkachenko]

Michal Januszczyk wrote:

What should I do to to find the element with XPath ?
should I prefix the XPath statement with namespace name Yes, you have to.
(but how, since this is a default namespace) Remember main rule of namespaces - prefix doesn't matter. Just use any
you like. What only matters is namespace URI.
Or maybe should I use XmlNamespaceManager class when
calling the SelectSingleNode(XPath,namespaceManager)... ?

I tried the second option but this did not help.
I used the following code:

XmlNamespaceManager nm=new XmlNamespaceManager
(xmlDoc.NameTable);
nm.AddNamespace("","http://www.foo.com/schema.xsd");

It's a faq. See also SelectNodes method description at MSDN.

XmlNamespaceManager nm=new XmlNamespaceManager(xmlDoc.NameTable);
nm.AddNamespace("foo","http://www.foo.com/schema.xsd");
XmlNode node = doc.SelectSingleNode("//foo:rule",nm);
--
Oleg Tkachenko
XML Insider
http://www.tkachenko.com/blog

[Michal Januszczyk]

>-----Original Message-----

XmlNamespaceManager nm=new XmlNamespaceManager
(xmlDoc.NameTable);
nm.AddNamespace("foo","http://www.foo.com/schema.xsd");
XmlNode node = doc.SelectSingleNode("//foo:rule",nm);

Great thanks!

Michal