How to Import stylesheets in xslt conditionally?
Is there any way to import styles开发者_运维问答heets after checking some conditions?
Like,if the value of variable $a="1" then import 1.xsl or else import 2.xsl.
Hi All, Is there any way to import stylesheets after checking some conditions?
Like,if the value of variable $a="1" then import 1.xsl or else import 2.xsl.
No, the <xsl:import> directive is only compile-time.
In XSLT 2.0 one can use the use-when attribute for a limited conditional compilation.
For example:
<xsl:import href="module-A.xsl"
use-when="system-property('xsl:vendor')='vendor-A'"/>
The limitations of the use-when attribute are that there is no dynamic context when the attribute is evaluated -- in particular that means that there are no in-scope variables defined.
A non-XSLT solution is to dynamically change the href attribute of the <xsl:import> declaration before the transformation is invoked:
Parse the xsl stylesheet as an XML file
Evaluate the condition that determines which stylesheet should be imported.
Set the value of the
hrefattribute of the<xsl:import>declaration to the URI of the dynamically determined stylesheet-to-be-imported.Invoke the transformation with the in-memory xsl stylesheet that was just modified.
I know this post is old, but I want to share my opinion.
Each display could use one template instead of two. The value display will be change with a VB application.
breakfast_menu.xml:
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="conditionDisplay.xsl" ?>
<data>
<breakfast_menu>
<food>
<name>Belgian Waffles</name>
<price>$5.95</price>
<description>Two of our famous Belgian Waffles with plenty of real maple syrup</description>
<calories>650</calories>
</food>
<food>
<name>Strawberry Belgian Waffles</name>
<price>$7.95</price>
<description>Light Belgian waffles covered with strawberries and whipped cream</description>
<calories>900</calories>
</food>
<food>
<name>Homestyle Breakfast</name>
<price>$6.95</price>
<description>Two eggs, bacon or sausage, toast, and our ever-popular hash browns</description>
<calories>950</calories>
</food>
</breakfast_menu>
<display>1</display>
</data>
In this file, I imported my displays and with a condition I tell the template what I need.
conditionDisplay.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
<xsl:import href="display1.xsl"/>
<xsl:import href="display2.xsl"/>
<xsl:template match="/">
<xsl:variable name="display"><xsl:value-of select= "data/display"/></xsl:variable>
<xsl:choose>
<xsl:when test="$display='1'">
<xsl:call-template name="display1" />
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="display2 />
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
display1.xsl:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template name="display1">
<html xsl:version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<body style="font-family:Arial;font-size:12pt;background-color:#EEEEEE">
<xsl:for-each select="data/breakfast_menu/food">
<div style="background-color:teal;color:white;padding:4px">
<span style="font-weight:bold"><xsl:value-of select="name"/> - </span>
<xsl:value-of select="price"/>
</div>
<div style="margin-left:20px;margin-bottom:1em;font-size:10pt">
<p>
<xsl:value-of select="description"/>
<span style="font-style:italic"> (<xsl:value-of select="calories"/> calories per serving)</span>
</p>
</div>
</xsl:for-each>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
display2.xsl:
<?xml version="1.0" encoding="UTF-8"?>futur
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template name="display2">
<html xsl:version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<body style="font-family:Arial;font-size:12pt;background-color:#222222">
<xsl:for-each select="data/breakfast_menu/food">
<div style="background-color:teal;color:white;padding:4px">
<span style="font-weight:bold"><xsl:value-of select="name"/> - </span>
<xsl:value-of select="price"/>
</div>
<div style="margin-left:20px;margin-bottom:1em;font-size:10pt">
<p>
<xsl:value-of select="description"/>
<span style="font-style:italic"> (<xsl:value-of select="calories"/> calories per serving)</span>
</p>
</div>
</xsl:for-each>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
I genuinely apologize for my terrible English. It will be better to the next post and I hope will help someone as I think it's not the best solution.
加载中,请稍侯......
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