Question

i wish to parse following XML

<?xml version="1.0" encoding="UTF-8"?>
<product xmlns="http://products.org"> 
    <make xmlns="http://camera.org">
 <model>Camry</model> 
</make>
 <make xmlns="http://tv.org">
   <model>Sony</model>
</make>
</product>

Code written to parse it

This is how i m writing Parsing Code

but in last i m getting null inxmlNode object. Can u tell what more to do .

Answer 1

You can’t ignore namespaces in XPath.* The elements in your document all have non-blank namespace URI’s.

Your question title indicates you’re on the right track: you need to explicitly bind the URI’s to prefixes using an XmlNamespaceManager, and use those prefixes in your path expressions.

This program is tested against your input document

using System;
using System.Xml;

public class XPathNamespace
{
    public static void Main() {

        XmlDocument doc = new XmlDocument();
        doc.Load("test1.xml");

        XmlNamespaceManager xnm = new XmlNamespaceManager(doc.NameTable);
        xnm.AddNamespace("p", "http://products.org");
        xnm.AddNamespace("c", "http://camera.org");
        xnm.AddNamespace("t", "http://tv.org");

        ShowNode(doc.SelectSingleNode("/p:product", xnm));
        ShowNode(doc.SelectSingleNode("/p:product/c:make", xnm));
        ShowNode(doc.SelectSingleNode("/p:product/t:make", xnm));
    }

    private static void ShowNode(XmlNode node) {
        Console.WriteLine("<{0}> {1}",
                          node.LocalName, 
                          node.NamespaceURI);
    }
}

and it produces the following output

<product> http://products.org
<make> http://camera.org
<make> http://tv.org

Hope this helps.

(*) This doesn’t mean you can’t ignore the exact namespace in your XPath. For example, you could match

/*[local-name()='product']

But that’s a workaround and illustrates that you still have to deal with the presence of a namespace somehow or other.