calling function with xslt using xpath selection - xslt

Question

How can I call javascript/c# function in xslt passing xpath selection value.
Here is how I call function with manualy typed parameter:
<xsl:value-of select="cs:my('some text')"/>

Answer 1

Here is an example from the MSXML 4 SDK (this should be the same for MSXML 6, and is quite similar for .NEt's XslCompiledTransform -- for the latter search MSDN for <msxsl:script>)
Example This example defines a script block with a namespace
prefix of user that contains a function called xml that takes a
node-list as an argument. Later, this function, xml(nodelist) in the
user namespace, is called from the select attribute of .
XML File (customers.xml)
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="script.xsl" ?>
<customers>
<customer>
<name>John Smith</name>
<address>123 Elm St.</address>
<phone>[phone]</phone>
</customer>
<customer>
<name>Mary Jones</name>
<address>456 Oak Ave.</address>
<phone>[phone]</phone>
</customer>
</customers>
XSLT File (script.xsl)
<?xml version='1.0'?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxsl="urn:schemas-microsoft-com:xslt"
xmlns:user="http://mycompany.com/mynamespace">
<msxsl:script language="JScript" implements-prefix="user">
function xml(nodelist) {
return nodelist.nextNode().xml;
}
</msxsl:script>
<xsl:template match="/">
<xsl:value-of select="user:xml(.)"/>
</xsl:template>
</xsl:stylesheet>
Formatted Output
<?xml version="1.0" encoding="UTF-16"?><?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="script.xsl" ?>
<customers>
<customer>
<name>John Smith</name>
<address>123 Elm St.</address>
<phone>[phone]</phone>
</customer>
<customer>
<name>Mary Jones</name>
<address>456 Oak Ave.</address>
<phone>[phone]</phone>
</customer>
</customers>