Question : Xpath query with namespace(s)

Hi experts,

Let's assume that the XML at the beginning of the code is loaded in C# in XmlDocument d.

I want to select the <c>value</c> node using d.SelectNodes(). I've tried the calls in the code but none of them succeeded. What should be the right code to get the requested node?

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// xml
<root>
<a>
<b xmlns="namespace">
<c>value</c>
</b>
</a>
</root>

// code 1
d.SelectNodes("/root/a/b/c");

// code 2
XmlNamespaceManager xnsmgr = new XmlNamespaceManager(d);
xnsmgr.AddNamespace(String.Empty, "namespace");
d.SelectNodes("/root/a/b/c", xnsmgr); // xnsmgr is XmlNamespaceManager 

// code 3
XmlNamespaceManager xnsmgr = new XmlNamespaceManager(d);
xnsmgr.AddNamespace("a", "namespace"); // the prefix mustn't be empty according to MSDN
xnsmgr.AddNamespace("a", "");
d.SelectNodes("/root/a/b/c", xnsmgr); // xnsmgr is XmlNamespaceManager

Answer : Xpath query with namespace(s)

You are going to have to use a namespace prefix because you have two different namespaces in your document:

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XmlNamespaceManager xnsmgr = new XmlNamespaceManager(d);
xnsmgr.AddNamespace("x", "namespace");

d.SelectNodes("/root/a/x:b/x:c", xnsmgr);

Question : Xpath query with namespace(s)

Answer : Xpath query with namespace(s)

You are going to have to use a namespace prefix because you have two different namespaces in your document: 1: 2: 3: 4: XmlNamespaceManager xnsmgr = new XmlNamespaceManager(d); xnsmgr.AddNamespace("x", "namespace"); d.SelectNodes("/root/a/x:b/x:c", xnsmgr);

You are going to have to use a namespace prefix because you have two different namespaces in your document:

1: 2: 3: 4:

XmlNamespaceManager xnsmgr = new XmlNamespaceManager(d); xnsmgr.AddNamespace("x", "namespace"); d.SelectNodes("/root/a/x:b/x:c", xnsmgr);