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Asked: 2026-05-10T15:26:28+00:00

In an ASP.NET 2.0 website, I have a string representing some well-formed XML. I

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In an ASP.NET 2.0 website, I have a string representing some well-formed XML. I am currently creating an XmlDocument object with it and running an XSL transformation for display in a Web form. Everything was operating fine until the XML input started to contain namespaces.

How can I read in this string and allow namespaces?

I’ve included the current code below. The string source comes from an HTML encoded node in a WordPress RSS feed.

XPathNavigator myNav= myPost.CreateNavigator(); XmlNamespaceManager myManager = new XmlNamespaceManager(myNav.NameTable); myManager.AddNamespace('content', 'http://purl.org/rss/1.0/modules/content/'); string myPost = HttpUtility.HtmlDecode('<post>' +     myNav.SelectSingleNode('//item[1]/content:encoded', myManager).InnerXml +     '</post>'); XmlDocument myDocument = new XmlDocument(); myDocument.LoadXml(myPost.ToString());

The error is on the last line:

‘System.Xml.XmlException: ‘w’ is an undeclared namespace. Line 12, position 201. at System.Xml.XmlTextReaderImpl.Throw(Exception e) …’

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1 Answer

  1. Gut feel – one of the namespaces declared in //content:encoding is being dropped (probably because you’re using the literal .InnerXml property)

    What’s ‘w’ namespace evaluate to in the myNav DOM? You’ll want to add xmlns:w= to your post node. There will probably be others too.

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