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Asked: 2026-05-27T15:00:35+00:00

All was well with my code in the tracer-bullet version that used POX, but

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All was well with my code in the tracer-bullet version that used POX, but then I added the XSL and I can no longer use .Element("anything")

Here’s my xml document:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:template match="*|@*">
  <xsl:apply-templates select="*|@*" />
 </xsl:template>
 <xsl:template match="CO">
  <html>
   <head>
    <title>My Page</title>
   </head>
   <body></body>
  </html>
 </xsl:template>
</xsl:stylesheet>

This throws a null reference exception:

templateDoc.Root.Element("body").Add(newElements);

because .Element("body") is null. templateDoc is an XDocument object that has been properly loaded with the XML above using: XDocument.Load(filePath);

What do I need to do in order to be able to do find the body node here?

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1 Answer

  1. Editorial Team

    You need to specify namespace.

      XDocument doc = XDocument.Load(file);
  XNamespace ns = "http://www.w3.org/1999/XSL/Transform";

  var result = from ele in doc.Descendants(ns + "stylesheet").Descendants("html")
                select ele;

    OR

        var result = (from ele in doc.Descendants(ns + "stylesheet").Descendants("body")
                 select ele).FirstOrDefault();

    if (result != null)
    {

        result.Add(new XElement("p", "Hello World"));
        doc.Save(file);
    }
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