passing parameter to xsl file

anandjun · March 24th, 2006, 01:14 PM

I am a newbie to XML/XSL.

I am passing the parameter in the link as you can see in the below html example. All I want is based on the keyname value passed in the link I want to retreive the data from XML file and then display it in the webpage. The below code doesn't seem to work. It is not displaying anything at all.

If I hard code the value for example if I change the following line in XSL file from

<xsl:if test="@id=$keyname"> to
<xsl:if test="@id='ab'">

it works like a charm. Please could someone let me know regarding this.

I have three files HTML/XML/XSL

1. html file has the following line

<a href="http://abcd.xml?keyname=abcd" target="_blank">link</a>

2. abcd.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<?xml-stylesheet type="text/xsl" href="abcd.xsl"?>
<mainpackage>
<Package id="123">
  <base id="ab">
</package>
<Package id="456">
  <base id="cd">
</package>
</mainpackage>

3. abcd.xsl

<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:param name="keyname"/>
<xsl:template match="/">
  <html>
    <body>
        <xsl:for-each select="mainpackage/Package">
            <xsl:if test="@id=$keyname">
                <xsl:value-of select="Base/@id"/>
            </xsl:if>
        </xsl:for-each>
    </body>
  </html>
</xsl:template>
</xsl:stylesheet>

joefawcett · March 24th, 2006, 01:24 PM

You cannot do this using a browsers built in ability to transform via a linked stylesheet as parameters in the query string are not passed on to the XSLT as params.
You will have to have a page that reads the query string, parses the parameter value and passes it to the stylesheet before executing the transform.
Alternatively do it server-side, the same sort of process but you won't have to worry about the client's browser type.

--

Joe (Microsoft MVP - XML)

anandjun · March 24th, 2006, 02:36 PM

Thanks for your response. Please could you give me an example.

mhkay · March 24th, 2006, 02:46 PM

Putting a parameter as part of a URL in a hyperlink doesn't have the effect of passing the parameter to the stylesheet. To pass a parameter to a stylesheet when running client-side (which you appear to be doing) you can't invoke the transformation using <?xml-stylesheet?>, you need to invoke it using the Javascript API from your HTML page, passing the parameter explicitly using the addParameter() method.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference