Test if Value is Empty in XML with XSL stylesheet

Question

I'm using an XSLTprocessor script to get data from an external source. Now I would like to test wether a certain value is empty and then return a empty field. this is the code I'm using now in my XSL stylesheet.

<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output method="html"/>

<xsl:template match="/">

  <table border="1" style="width:600px;margin-top:20px">
    <tr>
      <th align="left" style="text-transform: uppercase; font-size: 14px; color: white;font-weight: normal;">Date</th>
      <th align="left" style="text-transform: uppercase; font-size: 14px; color: white;font-weight: normal;">Location</th>
      <th align="right" style="text-transform: uppercase; font-size: 14px; color: white;font-weight: normal;">City</th>
      <th align="right" style="text-transform: uppercase; font-size: 14px; color: white;font-weight: normal;">Country</th>
      <th align="right" style="text-transform: uppercase; font-size: 14px; color: white;font-weight: normal;">Facebook</th>
    </tr>
    <xsl:for-each select="//item">
    <tr>
      <td style="text-align:left;"><xsl:value-of select="date" /></td>
      <td style="text-align:left;color:#ccc;"><xsl:value-of select="location" /></td>
      <td style="text-align:right;"><xsl:value-of select="city "/></td>
      <td style="text-align:right;"><xsl:value-of select="country" /></td>
      <td style="text-align:right;"><a>
<xsl:attribute name="href">
<xsl:value-of select="website" />
</xsl:attribute>
<xsl:attribute name="target">new</xsl:attribute>
I'm Attending
</a></td>
    </tr>
    </xsl:for-each>
  </table>
</xsl:template> 
</xsl:stylesheet>

I would like to have a conditional statement on the "website" value which returns a link to a Facebook event link. But when nothing is filled in the system where the data comes from, it should not display the link (I'm Attending)

How can this be preformed with a XSL test or some kind of conditional statement?

Dimitre Novatchev · Accepted Answer · 2012-03-29 12:33:54Z

2

I would like to have a conditional statement on the "website" value which returns a link to a Facebook event link. But when nothing is filled in the system where the data comes from, it should not display the link (I'm Attending)

A simple and elegant way to do this in XSLT:

<xsl:apply-templates select="website[text()]"/>

Then have this template:

<xsl:template match="website">
  <td style="text-align:right;">
    <a href="{.}" target="new">I'm Attending</a>
  </td>
</xsl:template>

Here you don't have to verify if the website element exists -- the XSLT processor does this work for you. In this way we don't have to write any explicit conditional instructions and the code is simple, short and readable.

answered Mar 29, 2012 at 12:33

Dimitre Novatchev

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Comments

Rorick · Accepted Answer · 2012-03-29 11:30:32Z

1

Try this for link displaying:

<xsl:if test="website/text()">
    <a>
    <xsl:attribute name="href">
        <xsl:value-of select="website" />
    </xsl:attribute>
    <xsl:attribute name="target">new</xsl:attribute>
    I'm Attending
    </a>
</xsl:if>

answered Mar 29, 2012 at 11:30

Rorick

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