Using xpath with xslt ?

[Sonu Kapoor]

Hi,

I would like to use xpath with xslt. I know that this
should be possible, but I dont get it ! Here is what I
have tried so far:

=============== =============== ======
my xml file:
=============== =============== ======

<?xml version="1.0" encoding="utf-8"?>
<CategoryList >
<Category ID="01">
<MainCategory>X ML1</MainCategory>
<Description>Th is is a list my XML
articles.</Description>
<Active>true</Active>
</Category>
<Category ID="02">
<MainCategory>X ML2</MainCategory>
<Description>Th is is a list my XML
articles.</Description>
<Active>true</Active>
</Category>
</CategoryList>
=============== =============== ======

my xsl file:

=============== =============== ======

<?xml version="1.0"?>
<xsl:styleshe et version="1.0"
xmlns:xsl="http ://www.w3.org/1999/XSL/Transform">
<xsl:param name="strXPath" select="Categor y"/>
<xsl:template match="/">
<xsl:apply-templates select="$strXPa th">
<xsl:sort select="categor y" order="descendi ng"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="Category ">
<b>
<xsl:value-of select="MainCat egory"/><br/>
</b>
</xsl:template>
</xsl:stylesheet>

=============== =============== ======

my code:

=============== =============== ======

<%@ Import Namespace="Syst em.Data" %>
<%@ Import Namespace="Syst em.Xml" %>
<%@ Import Namespace="Syst em.Xml.XPath" %>
<%@ Import Namespace="Syst em.Xml.Xsl" %>
<%@ Import Namespace="Syst em.IO" %>
<%@ Page Language="C#" Debug="true" %>

<script runat="server">
void Page_Load(objec t sender, System.EventArg s e){
if(!Page.IsPost Back){
XPathDocument xpathDoc = new XPathDocument
(Server.MapPath ("categories.xm l"));

XslTransform xslt = new XslTransform();
xslt.Load( Server.MapPath( "categories.xsl ") );

XsltArgumentLis t arguments = new XsltArgumentLis t();

string xpath="Category List/Category[@ID='01']";
arguments.AddPa ram( "strXPath", "", "xpath");

XmlTextWriter writer = new XmlTextWriter
(Response.Outpu t);
xslt.Transform( xpathDoc, arguments, writer, null);
}
}
</script>

Thanks in advance, Sonu Kapoor

[Oleg Tkachenko [MVP]]

Sonu Kapoor wrote:

I would like to use xpath with xslt. I know that this
should be possible, but I dont get it ! Here is what I
have tried so far:

In any compiled language you can't pass part of source code as a
parameter and expect it to run. XSLT isn't different, there is no
dynmaic XPath evaluation in XSLT.
Instead, select nodes you want to process using XPathNavigator and pass
them to XSLT as a parameter.

--
Oleg Tkachenko [XML MVP]
http://blog.tkachenko.com