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Re: [xsl] Switching off a filter by parameter
Subject: Re: [xsl] Switching off a filter by parameter From: Ronan Klyne <ronan.klyne@xxxxxxxxxxx> Date: Mon, 13 Nov 2006 17:47:29 +0000 |
Guy wrote: > I have the following snippet of XSL to filter a book collection by category: > > <xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> > <xsl:param name="categor"/> > <xsl:template match="/"> > <xsl:for-each select="books/book"> > <xsl:if test="category=$categor"> > <!-- Show info... --> > </xsl:if> > </xsl:for-each> > </xsl:template> > </xsl:stylesheet> > > My question: If the categor param is zero length (i.e. no filter) then how > do I test for this and allow all books through? In other words I would like > the commented code in the snippet above to be executed if the categor param > is not filled in. > > Thanks! Hi, Specify a default value for the parameter: <xsl:param name="categor" select="''"/> And test for it: <xsl:if test="$categor='' or category=$categor"> # r -- Ronan Klyne Business Collaborator Developer Tel: +44 (0)870 163 2555 ronan.klyne@xxxxxxxxxxx www.groupbc.com
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