XPath Query problem with Namespace

[MAF]

I am triing to query the following xml document. I am loading the xml into
a XML Document and then using XPath to get the EntityDataSet Node

Here is my code

XMLDoc = new System.Xml.XmlD ocument();

if (this.m_FileLoc ation != null && this.m_FileLoca tion.Length > 0)

XMLDoc.Load(thi s.m_FileLocatio n);

else

{

throw new System.IO.FileN otFoundExceptio n("File can not be found",
this.m_FileLoca tion);

}

//Locate Root

System.Xml.XmlN odeList rootList = XMLDoc.SelectNo des("//EntityDataSet") ;
//This returns nothing

If I remvoe the xmlns attribute of EntityTree I do get the desired note.
What do I need to do to my XPath to make this work properly?
<?xml version="1.0"?>

<EntityTreeColl ection ExportDateTime= "2/14/2005 4:57:31 PM"
SystemName="tes tXP" UserName="test" UserID="45">

<EntityTree xmlns="http://acme.com/EntityTree.xsd"
ExportedFromDat aModelVersion=" 4.9.0" EntityCount="7" >

<EntityTreeNo de Selected="true" >

<EntityDataSe t>

<Entity EntityID="10128 " EntityName="INT LOAD"/>

</EntityDataSet>

</EntityTreeNode>

</EntityTree>

</EntityTreeColle ction>

[Samu Lang]

Your XPath is looking for a node called EntityDataSet whose namespace uri is
empty, while the node you're searching from is qualified by the namespace
"http://acme.com/EntityTree.xsd" .

The easy solution is to select the node by local name:
http://msdn.microsoft.com/library/de...mefunction.asp
http://www.w3.org/TR/xpath#function-local-name

System.Xml.XmlN odeList rootList = XMLDoc.SelectNo des("//*[local-name() =
'EntityDataSet']");

The serious solution is to use namespace manager:
http://msdn.microsoft.com/library/de...classtopic.asp
http://msdn.microsoft.com/library/de...odesTopic2.asp

System.Xml.XmlN amespaceManager Manager = new
System.Xml.XmlN amespaceManager (XMLDoc.NameTab le);
Manager.AddName space("x", "http://acme.com/EntityTree.xsd" );

System.Xml.XmlN odeList rootList = XMLDoc.SelectNo des("//x:EntityDataSet ",
Manager);

[Martin Honnen]

MAF wrote:

I am triing to query the following xml document. I am loading the xml into
a XML Document and then using XPath to get the EntityDataSet Node If I remvoe the xmlns attribute of EntityTree I do get the desired note.
What do I need to do to my XPath to make this work properly?
<?xml version="1.0"?>

<EntityTreeColl ection ExportDateTime= "2/14/2005 4:57:31 PM"
SystemName="tes tXP" UserName="test" UserID="45">

<EntityTree xmlns="http://acme.com/EntityTree.xsd"
ExportedFromDat aModelVersion=" 4.9.0" EntityCount="7" >

You need to bind a prefix to the default namespace and use the prefix in
the XPath expression, see
<http://www.faqts.com/knowledge_base/view.phtml/aid/34022>
--

Martin Honnen
http://JavaScript.FAQTs.com/