Question

I want to ask how to get total amount if we use substring function,
for example I have this xml,

<document>

    <line id="0">
        <field id="0"><![CDATA[AAAddd17aaass]]></field>
    </line>
    <line id="1">
        <field id="0"><![CDATA[DDDaaa33sssaa]]></field>
    </line>
</document>

I should sum(substring(field[@id=’0′], 7,2)). Then I try to do that, I get this error message: Current Item is ‘NaN of type xs:string. (I try to use number function but it doesn’t help)

Please advice me how to solve it.

Answer 1

In XSLT 1.0 if you don’t want to write recursive templates yourself, you can use the transform-and-sum template from FXSL.

See how to use it here.

---

Here is the full transformation:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:f="http://fxsl.sf.net/"
xmlns:func-transform="f:func-transform"
exclude-result-prefixes="xsl f func-transform"
>
   <xsl:import href="transform-and-sum.xsl"/>

   <!-- to be applied on testTransform-and-sum.xml -->

   <xsl:output method="text"/>

   <func-transform:func-transform/>

    <xsl:template match="/">
      <xsl:call-template name="transform-and-sum">
        <xsl:with-param name="pFuncTransform"
                        select="document('')/*/func-transform:*[1]"/>
        <xsl:with-param name="pList" select="/*/*/*"/>
      </xsl:call-template>
    </xsl:template>

    <xsl:template match="func-transform:*" mode="f:FXSL">
      <xsl:param name="arg1" select="0"/>
      <xsl:value-of select="number(substring($arg1, 7,2))"/>
    </xsl:template>

</xsl:stylesheet>

when applied on the provided XML document:

<document>
    <line id="0">
        <field id="0"><![CDATA[AAAddd17aaass]]></field>
    </line>
    <line id="1">
        <field id="0"><![CDATA[DDDaaa33sssaa]]></field>
    </line>
</document>

the wanted, correct result is produced:

50