Using XPath against serialized object

[Don]

Hi:

I have the following web service object serialized into my XML DOM. With
XPath, I am able to select '//document/Info/ID' from the XML. Adding the
namespace is where I get a problem(see XML below).
--------------------------
<document>
<Info xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance">
<ID>416</LMID>
<NUM>1</BNUM>
</Info>

</document>

-------------------------------

Using the same XPath, nothing is returned. There are two ways I'd like to
try to solve this.

1) Try to remove the namespace (that seems to cause the problem)

2) Or make my XPath namespace aware.

<document>
<Info xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance">
<ID
xmlns="http://web/DataSubSystemWe bService/Services">416</LMID>
<NUM
xmlns="http://web/DataSubSystemWe bService/Services">1</BNUM>

</Info>

</document>

-------------------------------

Thanks in advance,

Don

[Derek Harmon]

"Don" <do************ *@hotmail.com> wrote in message news:O2******** ********@tk2msf tngp13.phx.gbl. ..

I am able to select '//document/Info/ID' from the XML. Adding the
namespace is where I get a problem(see XML below).

To make your XPath work with namespaces you must create an
XmlNamespaceMan ager and pass that as an argument to Select-
Nodes( ), there's an overload of that method that accepts an Xml-
NamespaceManage r for this purpose.

Additionally, since you have declared default namespaces, you
must associate a prefix with the namespaces in the XPath query.
It's a practical matter -- b/c you can't type an empty string as a
namespace prefix in an XPath expression.

For example, in VB.NET,

' Given xmlDoc is an XmlDocument containing your XML.
'
Dim nsMan As XmlNamespaceMan ager = _
New XmlNamespaceMan ager( xmlDoc.NameTabl e)
nsMan.AddNamesp ace( "ns1", "http://web/DataSubSystemWe bService/Services")
Dim nodes As XmlNodeList
nodes = xmlDoc.SelectNo des( "//document/Info/ns1:ID", nsMan)
'
' Enumerate over nodes with For Each or other loop to
' process each resulting XmlNode, if any.

See also the following article, I know you've overcome this before, :-)

http://groups-beta.google.com/group/...b?dmode=source
Derek Harmon