XPathNavigator.Select with a document that has default namespace only

[Jiho Han]

I have an xml document as follows:

<?xml version="1.0" encoding="utf-8" ?>
<entityConfigur ation xmlns="http://schemas.infinit yinfo.com/entityconfigura tion"
version="1.0">
<entity name="account">
<attribute name="accountid " />
</entity>
</entityConfigura tion>

I am trying to find all 'entity' elements to iterate and the following are
the snippets:

// in static constructor
XmlDocument doc = new XmlDocument();
_configExpr = doc.CreateNavig ator().Compile( "/entityConfigura tion/entity");
XmlNamespaceMan ager ns = new XmlNamespaceMan ager(new NameTable());
ns.AddNamespace ("", SchemaNamespace );
_configExpr.Set Context(ns);

// then in a method (xvr is a XmlValidatingRe ader for the above xml)
XPathDocument xpath = new XPathDocument(x vr);
XPathNavigator nav = xpath.CreateNav igator();
XPathNodeIterat or itr = nav.Select(_con figExpr); // this returns zero nodes.

Basically, the node set returned by the expression is 0. However, if I do:

XPathNodeIterat or itr = nav.SelectDesce ndants("entity" , SchemaNamespace ,
false);

Then, I will get the correct list of entity element nodes. I could also
move to entityConfigura tion node and use SelectChildren( "entity", SchemaNamespace )
with success.
Since Select is the only one that takes a compiled expression, I would like
to know why it's not working properly.

Thanks in advance.

Jiho Han
Senior Software Engineer
Infinity Info Systems
The Sales Technology Experts
Tel: 212.563.4400 x216
Fax: 212.760.0540
jhan@infinityin fo.com

https://www.infinityinfo.com

[Martin Honnen]

Re: XPathNavigator. Select with a document that has default namespaceonly



Jiho Han wrote:

I have an xml document as follows:
>
<?xml version="1.0" encoding="utf-8" ?>
<entityConfigur ation
xmlns="http://schemas.infinit yinfo.com/entityconfigura tion" version="1.0">
<entity name="account">
<attribute name="accountid " />
</entity>
</entityConfigura tion>
>
I am trying to find all 'entity' elements to iterate and the following
are the snippets:
>
// in static constructor
XmlDocument doc = new XmlDocument();
_configExpr = doc.CreateNavig ator().Compile( "/entityConfigura tion/entity");

_configExpr =
doc.CreateNavig ator().Compile( "/pf:entityConfig uration/pf:entity");

XmlNamespaceMan ager ns = new XmlNamespaceMan ager(new NameTable());
ns.AddNamespace ("", SchemaNamespace );

ns.AddNamespace ("pf", SchemaNamespace );

With XPath 1.0 you always need a prefix bound to a namespace URI to
select elements in that namespace, even if elements in the XML document
are in a default namespace and have no prefix. You can choose the prefix
as you like when you use the XPath API, and no change to the input XML
is needed

--

Martin Honnen --- MVP XML

http://JavaScript.FAQTs.com/

[Jiho Han]

Re: XPathNavigator. Select with a document that has default namespace only

Hello Martin,

That worked perfectly. Thank you.

Jiho

Jiho Han wrote:
>

>I have an xml document as follows:
>>
><?xml version="1.0" encoding="utf-8" ?>
><entityConfigu ration
>xmlns="http://schemas.infinit yinfo.com/entityconfigura tion"
>version="1.0 ">
><entity name="account">
><attribute name="accountid " />
></entity>
></entityConfigura tion>
>I am trying to find all 'entity' elements to iterate and the
>following are the snippets:
>>
>// in static constructor
>XmlDocument doc = new XmlDocument();
>_configExpr =
>doc.CreateNavi gator().Compile ("/entityConfigura tion/entity");

_configExpr =
doc.CreateNavig ator().Compile( "/pf:entityConfig uration/pf:entity");
>

>XmlNamespaceMa nager ns = new XmlNamespaceMan ager(new NameTable());
>ns.AddNamespac e("", SchemaNamespace );
>>

ns.AddNamespace ("pf", SchemaNamespace );
>
With XPath 1.0 you always need a prefix bound to a namespace URI to
select elements in that namespace, even if elements in the XML
document are in a default namespace and have no prefix. You can choose
the prefix as you like when you use the XPath API, and no change to
the input XML is needed
>