XSLT <xsl:if> Element
Definition and usage
The <xsl:if> element contains a template that is applied only when the specified condition is true.
Hint: Use <xsl:choose> with <xsl:when> and <xsl:otherwise> to express multiple conditional tests!
Syntax
<xsl:if test="expression"> <!-- Content: template --> </xsl:if>
Attribute
| Attribute | Value | Description |
|---|---|---|
| test | expression | Required. Specifies the condition to be tested. |
Instance
Example 1
When the price of the CD is higher than 10, select the values of title and artist:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<body>
<h2>My CD Collection</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>Title</th>
<th>Artist</th>
</tr>
<xsl:for-each select="catalog/cd">
<xsl:if test="price > 10">
<tr>
<td><xsl:value-of select="title"/></td>
<td><xsl:value-of select="artist"/></td>
</tr>
</xsl:if>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
View XML file,View XSL file,View results.
Example 2
Display the title of each CD. If it is not the last or second-to-last CD, insert ", " between each CD-title. If it is the last CD, add "!" after the title. If it is the second-to-last CD, add ", and " after it:
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<body>
<h2>My CD Collection</h2>
<p>Titles:
<xsl:for-each select="catalog/cd">
<xsl:value-of select="title"/>
<xsl:if test="position()!=last()">
<xsl:text>, </xsl:text>
</xsl:if>
<xsl:if test="position()=last()-1">
<xsl:text> and </xsl:text>
</xsl:if>
<xsl:if test="position()=last()">
<xsl:text>!</xsl:text>
</xsl:if>
</xsl:for-each>
</p>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
