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How can I compare dates using XSL?

Posted on 2016-08-26
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Last Modified: 2016-09-18
I have the below condition set within my xsl code:

<xsl:if test="ddwrt:FormatDateTime(string(@ExpiryDate), 1033, 'yyyyMMdd') &gt;= ddwrt:FormatDateTime(string(ddwrt:Today()), 1033, 'yyyyMMdd')">DO SOMETHING</xsl:if>

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The @ExpiryDate is a SharePoint column, this is why I am formatting the dates (expiry date and today date) to the same structure and language before comparison.

Strangely, when todays date is 26/08/2016 and the expiry date is 01/09/2016 the statement is not executed, however if todays date is 26/08/2016 and the expiry date is 09/09/2016 the statement is executed? I'm presuming the format isn't quite right somehow but I am finding it hard to test/debug.

Any help appreciated.
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Question by:Martin Spalding
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8 Comments
 
LVL 32

Expert Comment

by:Jamie McAllister MVP
ID: 41771868
I suspect your source data is returning the dates in US format as MM/DD and the format isn't picking that up.

That's why 9/9 works.
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Author Comment

by:Martin Spalding
ID: 41774681
So my FormatDateTime to 'yyyyMMdd' isn't happening? Can you suggest any fixes? Any code snippets to help?
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LVL 32

Expert Comment

by:Jamie McAllister MVP
ID: 41775258
Any chance you could output some raw dates so we could see the formatting?
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Author Comment

by:Martin Spalding
ID: 41775884
That's the thing, the date is passed in as a datafield (@ExpiryDate), Using javascript I would output this value via "alert(@ExpiryDate)" but using xsl I don't know how this can be outputted?

Thanks.
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LVL 32

Expert Comment

by:Jamie McAllister MVP
ID: 41776092
@ExpiryDate should output it I believe.

Another comparison approach would be the below. This is taking out the delimiters (dashes in this case) and doing a comparison of the raw numbers rather than as a date, assuming YearMonthDay format. ;

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
xmlns:date="http://exslt.org/dates-and-times"
extension-element-prefixes="date">

...

<xsl:for-each select="forms/form">

<xsl:variable name="today" select="translate(substring-before(date:date-time(), 'T'), '-', '')"/>
<xsl:variable name="start" select="translate(start, '-', '')"/>
<xsl:variable name="end" select="translate(end, '-', '')"/>

<xsl:if test="$start &lt;= $today and $today &lt;= $end">
    <!-- in progress -->
</xsl:if>

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See http://stackoverflow.com/questions/20342805/xslt-1-0-compare-dates
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Author Comment

by:Martin Spalding
ID: 41776246
The above code returns nothing so is a backward step for me. When you say @ExpiryDate should output the value what do you mean? How would I display this in an alert box for example?

Thanks.
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LVL 32

Accepted Solution

by:
Jamie McAllister MVP earned 2000 total points (awarded by participants)
ID: 41776618
Hi Martin,

I just meant that a standard select would output the value as text from your transform, so;

<xsl:value-of select="@ExpiryDate"/>

However I guess you could wrap an alert around that if you wanted;

alert(''<xsl:value-of select="@ExpiryDate"/>'');

To say that the XSL in the sample returns nothing, you mean the If didn't match anything? You replaced <!-- in progress --> with an action?
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LVL 32

Expert Comment

by:Jamie McAllister MVP
ID: 41803568
Working sample provided.
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