use xslt variable in xslt operator

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Dan 1288 posts 3921 karma points c-trib

Jan 07, 2010 @ 21:37

Hi,

I have a number of divs on a page. Every 6th div needs to have a different CSS class, so I'm trying to use the 'mod' function. It works when I hard code the value but not when I use an XSLT variable (of data type 'number').

The following code DOES work:

<xsl:choose>
   <xsl:when test="(position() mod 6) = 0">
        <xsl:attribute name="class"><xsl:text>alt-class</xsl:text></xsl:attribute>
    </xsl:when>
 <xsl:otherwise>
     <xsl:attribute name="class"><xsl:text>class</xsl:text></xsl:attribute>
    </xsl:otherwise>
</xsl:choose>

But this DOESN'T work:

<xsl:value-of select="$itemsPerLine"/>
<xsl:choose>
 <xsl:when test="(position() mod $itemsPerLine) = 0">
        <xsl:attribute name="class"><xsl:text>alt-class</xsl:text></xsl:attribute>
    </xsl:when>
 <xsl:otherwise>
     <xsl:attribute name="class"><xsl:text>class</xsl:text></xsl:attribute>
    </xsl:otherwise>
</xsl:choose>

Does anyone know how to get the XSLT variable to work?

Thanks

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Anders Burla 2560 posts 8256 karma points

Jan 07, 2010 @ 21:53

0

Try put it like this in the test:

test="(position() mod number($itemsPerLine)) = 0"

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Dan 1288 posts 3921 karma points c-trib

Jan 07, 2010 @ 22:44

0

Thanks Anders, I've tried that and it gives an error "Error parsing XSLT file".

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Chriztian Steinmeier 2800 posts 8790 karma points MVP 8x admin c-trib

Jan 07, 2010 @ 23:08
0
Hi Dan,

I'm guessing the error is due to the placement of the <xsl:value-of /> instruction. You can only add attributes to an element that hasn't been closed or had any child-content (elements or text) written to it. Make sure that your class attribute gets generated immediately after opening the <div> element:
```
<div class="default-class">
    <xsl:if test="position() mod number($itemsPerLine) = 0">
        <xsl:attribute name="class">alt-class</xsl:attribute>
    </xsl:if>
    <xsl:value-of select="$itemsPerLine" />
</div>
```
(Note, I've used a shortcut - since there can only be one attribute with the name "class", if you redefine it, it'll take the new value.)

You should be able to see the reason for the error using the XSLT Visualizer...

/Chriztian
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Dan 1288 posts 3921 karma points c-trib

Jan 07, 2010 @ 23:19
0
Ah, so I didn't need the line at the start:
```
<xsl:value-of select="$itemsPerLine"/>
```
Works perfectly now, thanks very much!
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