variable template parameter problem - UI Questions

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Steve D 11 posts 41 karma points

Feb 01, 2010 @ 10:42

0

variable template parameter problem

I am calling a template with the following code:

<xsl:template match="/">
<xsl:variable name="level" select="$currentPage/macro/startLevel"/>
<xsl:variable name="showList" select="$currentPage/macro/showList"/>

<ul class="{$showList}">

<xsl:call-template name="drawNodes">
<xsl:with-param name="parent" select="$currentPage/ancestor-or-self::node [@level ='1']" />
</xsl:call-template>

</ul>
</xsl:template>

which validates correctly, however when I use the "level" variable in the parent select value I get an error:

<xsl:template match="/">
<xsl:variable name="level" select="$currentPage/macro/startLevel"/>
<xsl:variable name="showList" select="$currentPage/macro/showList"/>

<ul class="{$showList}">

<xsl:call-template name="drawNodes">
<xsl:with-param name="parent" select="$currentPage/ancestor-or-self::node [@level = $level]" />
</xsl:call-template>

</ul>
</xsl:template>

error:

(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime, IList`1 parent)
at

(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Root(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Execute(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)

I think it may be to do with evaluating to a list, but I have no idea why replacing a static '1' with the variable $level (which will contain a '1') causes an error?

Any help would be gratefully received.

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Sebastiaan Janssen 5060 posts 15522 karma points MVP admin hq

Feb 01, 2010 @ 10:48
0
The level might be null or empty, the XSLT parser probably can't validate the xslt without knowing this, try this:
```
<xsl:if test="string($level) != ''>
 <xsl:with-param name="parent" select="$currentPage/ancestor-or-self::node [@level = $level]" />
</xsl:if>
```
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