Hi,

I need help to filter a nodeset based on multiple form values from a search form, using xslt.

The values might be null.

MY VALUES FROM QUERYSTRING
<xsl:variable name="CaseNo" select="umbraco.library:RequestForm('CaseNo')"/>
<xsl:variable name="Street" select="umbraco.library:RequestForm('Street')"/>
<xsl:variable name="Area" select="umbraco.library:RequestForm('Area')"/>
<xsl:variable name="HouseType" select="umbraco.library:RequestForm('HouseType')"/>
<xsl:variable name="PriceRange" select="umbraco.library:RequestForm('PriceRange')"/>
<xsl:variable name="SquareMeters" select="umbraco.library:RequestForm('SquareMeters' )"/>

HERE I LOAD MY XML FILE
<xsl:variable name="url" select="'http://URL to XML FILE"/>

<xsl:variable name="pagexml" select="umbraco.library:GetXmlDocumentByUrl($url)" />

HERE I NEED to FILTER THE NODESET, BASED ON THE VARIABLES ABOVE.
<xsl:variable name="sag" select="$pagexml/sager/sag"></xsl:variable>


LOAD THE FILTERED NODES
<xsl:for-each select="$sag">
</xsl:for-each>

Let's assume that when you say a value might be "null", you mean it might contain an empty string.

Then you can write a predicate like this:

select="$pagexml/sager/sag[($CaseNo='' or $CaseNo=CaseNo) and ($Street='' or $Street=Street) and ($Area='' or $Area=Area) and ....]"

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