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RE: calculating list of values using variables

• From: Paul Brown <Paul.Brown@s...>
• To: xml-dev@l...
• Date: Thu, 20 Sep 2001 10:05:26 +0100

here's my feeble effort :)



<xsl:transform xmlns:xsl='http://www.w3.org/1999/XSL/Transform'
version='1.0'>
  <xsl:template match='/'>
    <xsl:variable name='result'>
     <xsl:call-template name='sum'>
        <xsl:with-param name='amounts'
select='/detailss/details/detail/amount' />
        <xsl:with-param name='quants'
select='/detailss/details/detail/quantity' />
        <xsl:with-param name='tally' select='0' />
     </xsl:call-template>
    </xsl:variable>
    <result><xsl:value-of select='$result' /></result>
  </xsl:template>

  <xsl:template name='sum'>
    <xsl:param name='amounts'/>
    <xsl:param name='quants'/>
    <xsl:param name='running'/>
    <xsl:choose>
     <xsl:when test='count($amounts)!=0'>
       <xsl:call-template name='sum'>
         <xsl:with-param name='amounts' select='$amounts[position()>1]'
/>
         <xsl:with-param name='quants' select='$quants[position()>1]' />
         <xsl:with-param name='tally'
select='$amounts[1]*$quants[1]+$tally' />
       </xsl:call-template>
     </xsl:when>
     <xsl:otherwise>
       <xsl:value-of select='$tally'/>
     </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

</xsl:transform>


and i hope your document looks like this ...


<?xml version='1.0'?>
<detailss>
 <details>
  <detail>
    <amount>1</amount>
    <quantity>5</quantity>
  </detail>
 </details>
 <details>
  <detail>
    <amount>2</amount>
    <quantity>1</quantity>
  </detail>
  <detail>
    <amount>3</amount>
    <quantity>2</quantity>
  </detail>
 </details>
</detailss>



-----Original Message-----
From: Ian Rogers [mailto:ian.rogers@n...]
Sent: Wednesday, September 19, 2001 12:02 PM
To: 'Xml-Dev
Subject:  calculating list of values using variables


can anyone help.

I sent a post out before about trying to use variables, and have been
trying
some code but it comes up with the error "Keyword xsl:stylesheet may not
contain PCDATA nodes."

I have a set of details which contain an amount and a quantity and i
want to
calculate the total amount for each set of details. I can calculate that
and
place it in a variable, but i now want to calculate the total for all
the
sets of details, giving an overall amount for all the sets of details

<xsl:variable name="Items" select="//details"/>

   <xsl:variable name="TotalValue">
    <xsl:call-template name="Total">
     <xsl:with-param name="Items" select="$Items"/>
     <xsl:with-param name="RunningTotal"    select="0"/>
    </xsl:call-template>
  </xsl:variable>

    Total = <xsl:value-of
    select="format-number($TotalValue, '####0.0#')"/>

 <xsl:template name="Total">
  <xsl:param name="Items"/>
  <xsl:param name="RunningTotal"/>
  <xsl:choose>
   <xsl:when test="not($Items)">
    <xsl:copy-of select="$RunningTotal"/>
   </xsl:when>
   <xsl:otherwise>
  <xsl:variable name="CurrentTotal"
			 select="$RunningTotal + ($Items[1]/amount *
$Items[1]/quantity)"/>

   <xsl:call-template name="Total">
    <xsl:with-param name="Items" select="$Items[position()>1]"/>
    <xsl:with-param name="RunningTotal" select="$CurrentTotal"/>
   </xsl:call-template>
   </xsl:otherwise>
  </xsl:choose>
 </xsl:template>

"then i am calling the rest of my code to generate the table by using a
template and matching on the root node. I don't know if this could be
causing a problem?

<xsl:template match="/">

i would be very grateful if anyone could see what i am doing wrong or if
there is another way to calculate the total amount

thanks

Ian


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