Getting an IXPathNavigator's Document

[Keith Patrick]

I'm trying to do the functional equivalent of IsNodeDocument(IXPathNavigable
myNode, IXPathNavigable potentialRoot), but I can't seem to get any
comparisons that will work. If I use MoveToRoot(), I lose the state of
myNode, but SelectAncestors(XPathNodeType.Root, true/false) won't work on an
attribute.

[Oleg Tkachenko [MVP]]

Keith Patrick wrote:

I'm trying to do the functional equivalent of IsNodeDocument(IXPathNavigable
myNode, IXPathNavigable potentialRoot), but I can't seem to get any
comparisons that will work.

If I use MoveToRoot(), I lose the state of
myNode,

You can always clone current node - that's the recommended way.

but SelectAncestors(XPathNodeType.Root, true/false) won't work on an
attribute.

SHould work I think. Select("/") will work anyway.
--
Oleg Tkachenko [XML MVP, MCPD]
http://blog.tkachenko.com | http://www.XmlLab.Net | http://www.XLinq.Net

[Keith Patrick]

That works, thanks. Do you happen to know if "/" is defined as a constant
somewhere in the BCL? I'ver searched some of the XPath namespace for one
but couldn't find one.

[Oleg Tkachenko [MVP]]

Keith Patrick wrote:

That works, thanks. Do you happen to know if "/" is defined as a constant
somewhere in the BCL? I'ver searched some of the XPath namespace for one
but couldn't find one.

/ is defined as root node in XPath. See
http://www.w3.org/TR/xpath#location-paths

--
Oleg Tkachenko [XML MVP, MCPD]
http://blog.tkachenko.com | http://www.XmlLab.Net | http://www.XLinq.Net

[Keith Patrick]

I mean in the sense that there's a declaration:
public const String RootNode = "/";
somewhere in the BCL (i.e. System.Xml.XPath.XPathExpression). FxCop will
generally flag magic strings, and I have a const already defined, but if
there's a BCL-defined constant for the root node, I'd rather use it.

[Oleg Tkachenko [MVP]]

Keith Patrick wrote:

I mean in the sense that there's a declaration:
public const String RootNode = "/";
somewhere in the BCL (i.e. System.Xml.XPath.XPathExpression). FxCop will
generally flag magic strings, and I have a const already defined, but if
there's a BCL-defined constant for the root node, I'd rather use it.

No, I don't think there is such constant. It's just XPath expression.

--
Oleg Tkachenko [XML MVP, MCPD]
http://blog.tkachenko.com | http://www.XmlLab.Net | http://www.XLinq.Net