Cannot transform XML to HTML through .NET System.Xml.Xsl.XslCompiledTransform

Question

I have this xsl:

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" 
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:cf="http://AAA"
                xmlns="http://AAA"
                exclude-result-prefixes="cf">

  <xsl:output method="xml" indent="yes"/>

  <xsl:template match="/cf:Content">
    <html>
      <head>
        <title>AAA</title>
      </head>
      <body>
        Hello everybody
      </body>
    </html>
  </xsl:template>

</xsl:stylesheet>

this xml:

<?xml version="1.0" encoding="utf-8" ?>
<?xml-stylesheet href="myxsl.xslt" type="text/xsl"?>
<cf:Content xmlns:cf="http://AAA"
            xmlns="http://AAA">

  Hello.

</cf:Content>

The namespace referenced by the xml is an xsd of mine (validation is correct).

Well, is I open the xml file with a browser, the xslt works.

Now, I have this code:

string xml = "THE SAME XML OF THE XML FILE";

XslCompiledTransform transform = new XslCompiledTransform();
using (XmlReader xr = 
      XmlReader.Create("myxsl.xslt")) { 
   transform.Load(xr); 
}

try {
   using (StringWriter sw = new StringWriter())
   using (StringReader sr = new StringReader(xml))
   using (XmlReader xr = XmlReader.Create(sr)) {

      transform.Transform(xr, new XsltArgumentList(), sw);
      string html = sw.ToString();
      this.Preview_Literal.Text = html;

   }
} catch (Exception ex) {
throw ex;
}

Of course it get an exception:

Error: Data at the root level is invalid. Line 1, position 1. - Type: System.Xml.XmlException

What is the problem?

Some comments: if you want your stylesheet to create HTML output then using <xsl:output method="html" .../> instead of method="xml" is the right approach. And if you want to create HTML elements then remove the xmlns="http://AAA" from the xsl:stylesheet as HTML elements don't belong in that namespace. None of that explains the error you get but I suspect that is not caused by XSLT at all, rather simply happening when the input markup is parsed as XML. Can you post a stack trace? Where/how is the xml variable populated? — Martin Honnen
– Martin Honnen, Commented Jul 2, 2011 at 11:43
@Martin: You are right, removing namespaces was the irght choice, now it works. Thankyou :) Make that your answer, I'll check it as this question answer :) Thanks again — Andry
– Andry, Commented Jul 2, 2011 at 12:34

OmegaZiv · Accepted Answer · 2012-01-29 20:49:56Z

1

Martin's answer:

remove the default namespace, xmlns="http://AAA", from the xsl:stylesheet as HTML elements don't belong in that namespace. For example, <head> is actually <cf:head> by default.

answered Jan 29, 2012 at 20:49

OmegaZiv

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4 Comments

John Saunders Over a year ago

Question: if Martin has answered it already, then why did you answer it again?

OmegaZiv Over a year ago

@John, since I found the question in the "unanswered" section. Since it had an answer, and a good one, I figured it should be "answered". Nothing more.

John Saunders Over a year ago

Why not let Martin answer the question?

OmegaZiv Over a year ago

If you check the dates - Martin commented the answer in 2011. I found this question at 2012. I figured he is not coming back to answer it. John, I can assure you I placed an "answer" just for the protocol - to mark this question answered.

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