Possible bug in XmlNode

[J Mon]

I have a XML document with elements like
<offer>
<field name="name"><![CDATA[DS SIL CON]]></field>
<field name="merchant_id"><![CDATA[3001]]></field>
.....
</offer>

I know not the best XML! Now I am selecting different values by XPath
having an XmlNode representing the <offer> element. Now when I try something
like this

XmlNode dataNode = offerNode.SelectSingleNode("field[@name='merchant_id']");

this works fine and returns a result. However the following query runs but
returns nothing:

XmlNode dataNode = offerNode.SelectSingleNode("field[@name='name']");

Now the only thing I can think of is that the attribute and text have the
same value. I tried the same query as an XPathExpression:

XPathExpression searchData = navigator.Compile(("field[@name='name']");
XPathNodeIterator iter = navigator.Select(searchData);

and surprise surprise it works.
So is this a bug in using the SelectNodes() or SelectSingleNode methods on
an XmlNode?

[Martin Honnen]

J Mon wrote:

I have a XML document with elements like
<offer>
<field name="name"><![CDATA[DS SIL CON]]></field>
<field name="merchant_id"><![CDATA[3001]]></field>
....
</offer> However the following query runs but
returns nothing:

XmlNode dataNode = offerNode.SelectSingleNode("field[@name='name']");

This is a complete test case using your example XML and your example
XPath expression:

using System;
using System.Xml;

public class Test2005091901 {
public static void Main (string[] args) {
string xmlSource = @"<offer>
<field name=""name""><![CDATA[DS SIL CON]]></field>
<field name=""merchant_id""><![CDATA[3001]]></field>
</offer>";

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(xmlSource);

XmlElement offerElement = xmlDocument.DocumentElement;

XmlNode field = offerElement.SelectSingleNode("field[@name='name']");

Console.WriteLine("SelectSingleNode result: {0}.", field);
}
}

I get the output

SelectSingleNode result: System.Xml.XmlElement.

with .NET 1.1 which seems fine to me, an element node is found.

Does that test case give a different result for you?

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[J Mon]

I stand corrected. Must be something deeper nested in the code that is
causing the XmlNode to be empty.

"Martin Honnen" wrote:

J Mon wrote:

I have a XML document with elements like
<offer>
<field name="name"><![CDATA[DS SIL CON]]></field>
<field name="merchant_id"><![CDATA[3001]]></field>
....
</offer>

However the following query runs but
returns nothing:

XmlNode dataNode = offerNode.SelectSingleNode("field[@name='name']");

This is a complete test case using your example XML and your example
XPath expression:

using System;
using System.Xml;

public class Test2005091901 {
public static void Main (string[] args) {
string xmlSource = @"<offer>
<field name=""name""><![CDATA[DS SIL CON]]></field>
<field name=""merchant_id""><![CDATA[3001]]></field>
</offer>";

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(xmlSource);

XmlElement offerElement = xmlDocument.DocumentElement;

XmlNode field = offerElement.SelectSingleNode("field[@name='name']");

Console.WriteLine("SelectSingleNode result: {0}.", field);
}
}

I get the output

SelectSingleNode result: System.Xml.XmlElement.

with .NET 1.1 which seems fine to me, an element node is found.

Does that test case give a different result for you?

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/