Re: [xsl] Return value from a template 2...

[Ruud Grosmann <r.grosmann@xxxxxx>]

Batis DAVE wrote:
> I want to return a value from a template(getIdList). The returned
> value is saved in a variable ($idList) and is a string wich is the
> concatenation  of my nodes id : id1,id2,id3,...
> I use this code wich is not working... i got nothing when i display
> the variable value...!!
>
> Here's my code:
>
> <?xml version="1.0"?>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0">
> <xsl:output indent="yes" method="html" omit-xml-declaration="no"
> encoding="ISO-8859-1" />
> <xsl:param name="delimiter" select="','"/>
>
>        <xsl:template match="/root">
>                <xsl:variable name="idList">
>                        <xsl:call-template select="/root/vid" name="getIdList" />
>                </xsl:variable>
>                <xsl:value-of select="$idList"/>
>        </xsl:template>
>
>        <xsl:template match="/root/vid" name="getIdList">
>                <xsl:for-each select=".">
>                        <xsl:variable name="var"
> select="concat($var,ids, $delimiter)"/>
>                </xsl:for-each>
>                <xsl:value-of select="$var"/>
>        </xsl:template>
>
> </xsl:stylesheet>
>
> What's wrong in it? is there another simple way to get what i want?
Hi Dave,

for the first, you cannot pass parameters to a template with select and 
match.
The other problem is the scope of the variable 'var'. It only lives 
within the scope of the for-each. So if you try to get a value from it 
outside the foreach it is empty (it is not defined)

See the stylesheet below for a newbie-solution. It uses recursion.

regards, Ruud

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
version="1.0">
<xsl:output indent="yes" method="html" omit-xml-declaration="no"
                                        encoding="ISO-8859-1" />

<xsl:param name="delimiter" select="','"/>

<xsl:template match="/root">
  <xsl:variable name="idList">
    <xsl:call-template name="getIdList">
      <xsl:with-param name='list' select="/root/vid"/>
    </xsl:call-template>
  </xsl:variable>
  <xsl:value-of select="$idList"/>
</xsl:template>

<xsl:template name="getIdList">
  <xsl:param name='list'/>

    <xsl:if test="count($list) > 0">
      <xsl:value-of select='$list[1]'/>
      <xsl:text>,</xsl:text>
      <xsl:call-template name="getIdList" >
        <xsl:with-param name='list' 
select="$list[1]/following-sibling::*"/>
      </xsl:call-template>
    </xsl:if>
</xsl:template>

</xsl:stylesheet>