Modifying XSL for multi lookup field

Question

I'm trying to create custom XSLT for a multi lookup field, based on this article. When changing disable-output-escaping to yes I can see the html I want to modyify:

<a onclick="OpenPopUpPage('http://...', RefreshPage); return false;"
href="http:/...">
7</a>
<a onclick="OpenPopUpPage('...', RefreshPage); return false;"
href="http:/...">
17</a>

Now what I want to achieve, is:
1) change the links text (7 and 17 are some field values from lookup list, they're not itemIDs on this list) to multiply the values by a value from another column (C) (I can access it, so probably would pass it as a parameter to template)
2) split the displayed items with some charactrer, like '|'
So what I want to get after modifications would be (if C value = 2): 14 | 34 instead of 7; 17 which is normaly displayed in this mulitlookup column. Is it possible to modify the script I'm using to achieve this?

Answer 1

You'll need to have all the values as either properties (@columnname) or as parameters ($parameterOfColumnname) and use the XSLT method sum().

<xsl:variable name="multiplyingValue">
    <xsl:value-of select="@multiplyingValue" />
</xsl:variable>
<xsl:variable name="firstNumber">
    <xsl:value-of select="@firstNumber" />
</xsl:variable>
<xsl:variable name="secondNumber">
    <xsl:value-of select="@secondNumber" />
</xsl:variable>

<xsl:if test="$multiplyingValue != ''">
    <xsl:value-of select="sum($firstNumber * $multiplyingValue)" />
    |
    <xsl:value-of select="sum($secondNumber * $multiplyingValue)" />
</xsl:if>

I'm not 100% sure if sum() is needed. I've seen examples on this without using sum() but still doing the <xsl:value-of select="value here * $multiplyingValue" />

Hope this helps :)