javascript problem in stylesheet extension

polecat · June 20th, 2003, 09:03 AM

Hi folks,

I'm trying to use this function in a stylesheet. (this is just the beginning, I plan to develop it further)

<msxsl:script language="JScript" implements-prefix="numberfunctions"><![CDATA[

    function getMax(n){
        n=parseFloat(n);
        n = isNaN(n) ? 0 : n.toExponential();
        return n;
    }

]]></msxsl:script>

the toExponential() method causes this error:

Microsoft JScript runtime error Wrong number of arguments or invalid property assignment line = 4, col = 2 (line is offset from the start of the script block). Error returned from property or method call.

When I use this function in a normal HTML page it works fine... its almost like the stylesheet extension is using an older version of javascript that does not support this method. Any ideas folks?

joefawcett · June 27th, 2003, 09:58 AM

Works fine on my machine. Can we see the full stylesheet and if relevant xml?

--

Joe

polecat · June 27th, 2003, 10:10 AM

Hi Joe,

Trust me, you don't want to see the whole stylesheet - its massive!!

Anyway, the relevant bit is as follows

(it determines the highest value in the data)

<xsl:variable name="HighValue_actual" select="PROFREP:total[@month > 0]/@actual_value[not(../../PROFREP:total[@month > 0]/@actual_value > .)]" />
    <xsl:variable name="HighValue_profile" select="PROFREP:total[@month > 0]/@profile_value[not(../../PROFREP:total[@month > 0]/@profile_value > .)]" />
    <xsl:variable name="HighValue">
        <xsl:choose>
        <xsl:when test="$HighValue_actual > $HighValue_profile">
            <xsl:value-of select="$HighValue_actual"/>
        </xsl:when>
        <xsl:otherwise>
            <xsl:value-of select="$HighValue_profile"/>
        </xsl:otherwise>
        </xsl:choose>
    </xsl:variable>

<div style="left:0;top:0;"><xsl:value-of select="numberfunctions:getMax($HighValue)"/></div>

The XML is many rows of data like this

<PROFREP:category code="AL" traincat="AMA" target="8">
  <PROFREP:total month="0" profile_value="0" actual_value="8" perc_value="100" />
  <PROFREP:total month="1" profile_value="0" actual_value="0" perc_value="0" />
  <PROFREP:total month="2" profile_value="0" actual_value="1" perc_value="12.5" />
  <PROFREP:total month="3" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="4" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="5" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="6" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="7" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="8" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="9" profile_value="0" actual_value="0" perc_value="12.5" />
  <PROFREP:total month="10" profile_value="0" actual_value="2" perc_value="37.5" />
  <PROFREP:total month="11" profile_value="4" actual_value="3" perc_value="75" />
  <PROFREP:total month="12" profile_value="4" actual_value="2" perc_value="100" />
  </PROFREP:category>

polecat · June 27th, 2003, 10:21 AM

basically what I'm trying to do here is determine a suitable range for the Y-axis of a graph of that data, so if anyone can come up with a way by barking up a different tree then that would be cool too.

The diversity of values is too great to do a simple multiple where clause... some of these might be in the range 0-5, some may be in the range 0-10,000,000.

Thats why I was thinking along the lines of extracting the value as an exponential so i can choose a value and then multiply it by the relevant number of tens.

joefawcett · June 27th, 2003, 10:44 AM

Well as you say it might be using a different version of JScript. How are you performing the transform. Can you try running the code below?

Code:

<?xml version='1.0' encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:numberfunctions="myUrn">
  <msxsl:script language="JScript" implements-prefix="numberfunctions"><![CDATA[


   function getScriptEngineInfo()
   {
     var s;
     s = ""; // Build string with necessary info.
     s += ScriptEngine() + " Version ";
     s += ScriptEngineMajorVersion() + ".";
     s += ScriptEngineMinorVersion() + ".";
     s += ScriptEngineBuildVersion();
     return(s);
   }


]]></msxsl:script>
  <xsl:template match="/">
        <xsl:value-of select="numberfunctions:getScriptEngineInfo()"/>
  </xsl:template>
</xsl:stylesheet>

against any xml file and then from a web page to see if there's a difference?

--

Joe

polecat · June 27th, 2003, 10:52 AM

it says JScript Version 5.5.6330 which is what I would expect it to be using, same as JScript for normal use in client side scripting... I wonder why it won't recognise that method then?

joefawcett · June 28th, 2003, 03:44 AM

Well the only other thing is that there may be some restrictions on what numbers it can handle. Does it each time it is called or just sometimes. Perhaps you could use a try/catch block to trap the error and output a distinct value if it errored.

--

Joe

polecat · June 30th, 2003, 05:57 AM

I've tried the Try/Catch - it just gives me [object Error]

I may have to give up on doing it in the stylesheet, and instead work out the values elsewhere and feed them in.

polecat · June 30th, 2003, 11:06 AM

I've got to the bottom of this... yet again I was wasting time looking in totally the wrong place for the error.

I should have called numberfunctions:getMax(number($HighValue))

I guess the function must have seen the incoming parameter as a node rather than a number, hence that method not being available.

How annoying is that!