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I am getting an intermittent System.Xml.Xsl.XslTransformException exception in our production environment when attempting an xslt transform, unfortunately I cannot replicate this in the development environment.
The exception spits out further details:
Execution of the 'document()' function was prohibited. Use the XsltSettings.EnableDocumentFunction property to enable it. An error occurred at C:\path\to\file\CDS.xsl(16,3).
However the EnableDocumentFunction property is set to true in the processing code:
private void Transform()
{
var keepTrying = true;
var tryCount = 0;
const int maxRetrys = 3;
while (keepTrying)
{
try
{
var xmlResolver = new XmlUrlResolver();
using (var xmlFile = new XmlNodeReader(_xDoc))
{
var settings = new XmlReaderSettings
{
XmlResolver = xmlResolver,
ProhibitDtd = false,
DtdProcessing = DtdProcessing.Ignore
};
using (var xsl = XmlReader.Create(_xslPath, settings))
{
var xslt = new XslCompiledTransform(true);
xslt.Load(xsl, new XsltSettings { EnableDocumentFunction = true }, xmlResolver);
var sb = new StringBuilder();
using (var writer = XmlWriter.Create(sb, xslt.OutputSettings))
{
xslt.Transform(xmlFile, null, writer, xmlResolver); // errors out here.
}
var xhtml = sb.ToString();
_transformedXml = xhtml;
_isTransformed = true;
xsl.Close();
}
}
keepTrying = false;
}
catch (System.Xml.Xsl.XsltException ex)
{
ExceptionPolicy.HandleException(ex, "ExceptionLogging");
tryCount++;
if (tryCount > maxRetrys)
{
keepTrying = false;
throw;
}
}
}
}
The xslt file is provided by a third party and automatically updated, so rewriting it is not an option. Here is the top of it, slightly modified for privacy reasons:
<?xml version="1.0"?>
<!--
Interaction_550.xsl : 20110916
-->
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:example="http://www.example.com" version="1.0">
<xsl:param name="D2DSeverityFilter"></xsl:param>
<xsl:param name="D2HSeverityFilter"></xsl:param>
<xsl:param name="DocumentationFilter"></xsl:param>
<xsl:output method="html"/>
<xsl:key name="d2d_sev_level-lookup" match="example:d2d_sev_level" use="@name"/>
<xsl:key name="d2h_sev_level-lookup" match="example:d2h_sev_level" use="@name"/>
<xsl:key name="d2l_sev_level-lookup" match="example:d2l_sev_level" use="@name"/>
<xsl:key name="preg_cat-lookup" match="example:preg_cat" use="@cat"/>
<xsl:key name="doc_level-lookup" match="example:doc_level" use="@name"/>
<xsl:variable name="d2d_sev_level-top" select="document('')/*/example:d2d_sev_levels"/>
<xsl:variable name="d2h_sev_level-top" select="document('')/*/example:d2h_sev_levels"/>
<xsl:variable name="d2l_sev_level-top" select="document('')/*/example:d2l_sev_levels"/>
<xsl:variable name="doc_level-top" select="document('')/*/example:doc_levels"/>
<xsl:variable name="preg_cat-top" select="document('')/*/example:preg_cats"/>
<xsl:template match="/">
<head>
<style type="text/css">
body {
font-family : arial,sans serif,helvetica;
}
...
How can I:
566
Alternatively with MS XslCompiledTransform class you can use a XsltSettings class to avoid this error as it described by the error itself. from MSDN
179
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