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Mike Hemma

Subject: For-each select and parameter wildcard?
Author: Mike Hemma
Date: 06 Feb 2008 05:47 AM

Hi all,
Does anyone know why this doesn´t work, and if there is any other way to accomplish this?

I assign three parameters which I need to use to filter the data in a XML file:

<xsl:param name="param_A">jazz</xsl:param>
<xsl:param name="param_B">instrumental</xsl:param>
<xsl:param name="param_C">*</xsl:param>

The Select statement below is what I want to do. And it works great as long as all three parameters have some sort of values...

<xsl:for-each select="list/records[A=$param_A and B=$param_B and C=$param_C]">
(Code to show filtered output here)
</xsl:for-each>

...but when a parameter has the value * (wildcard) then it breaks. Instead of showing filtered output where C can be anything, it shows nothing.

The Select statement works if I hardcode the wildcard character like this:

<xsl:for-each select="list/records[A=$param_A and B=$param_B and C=*]">

In my real code, the parameter values are assigned dynamically. Is there any way to get a filtered output like the above Select statement, where wildcards or similar can be used?

/Mike

Ivan Pedruzzi

Subject: For-each select and parameter wildcard?
Author: Ivan Pedruzzi
Date: 06 Feb 2008 10:54 AM

Hi Mike,

The value of pararm_C is a string not an XPath expression

C=$param_C becames at runtime C = '*'

try the following

<xsl:for-each select="list/records[A=$param_A and B=$param_B and C=$param_C or $param_C='*']">

Hope this helps
Ivan Pedruzzi
Stylus Studio Team
http://www.stylusstudio.com/xml_download.html

Mike Hemma

Subject: For-each select and parameter wildcard?
Author: Mike Hemma
Date: 06 Feb 2008 12:00 PM

Ivan you have made my day!
Thank you, it works perfectly. And what a smart way around the problem :)

Thx again!

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