XSL condition if
XSL can filter information from an XML document with an if statement.
Where do I put the IF condition
Now take a look at the XML document you've seen several times:
<?xml version= "1.0"?>
<CATALOG>
<CD>
<title>empire burlesque</title>
<artist>bob dylan</artist>
<COUNTRY> --> USA </COUNTRY>
<COMPANY> Columbia </COMPANY>
<PRICE>10.90</PRICE>
<YEAR>1985</YEAR>
</CD>
.
.
.
To place a condition test if command on the contents of a file, simply add a xsl:if element to the XSL document, as follows:
<xsl:if match= ". [artist= ' Bob Dylan '] >
... Some output ...
</xsl:if>
Now take a look at the slightly resized XSL style sheet:
<?xml version= ' 1.0 '?>
<xsl:stylesheet xmlns:xsl= "Http://www.w3.org/TR/WD-xsl" >
<xsl:template match= "/" >
<body>
<table border= "2" bgcolor= "Yellow" >
<tr>
<th>Title</th>
<th>Artist</th>
</tr>
<xsl:for-each select= "CATALOG/CD" >
<xsl:if match= ". [artist= ' Bob Dylan '] >
<tr>
<td><xsl:value-of select= "TITLE"/></td>
<td><xsl:value-of select= "ARTIST"/></td>
</tr>
</xsl:if>
</xsl:for-each>
</table>
</body>
</xsl:template>
</xsl:stylesheet>
Converting in Browser
The following are the simple code needed to convert an XML file into HTML in a browser:
<body>
<script language= "JavaScript" >
Load XML
var xml = new ActiveXObject ("Microsoft.XMLDOM")
Xml.async = False
Xml.load ("Cd_catalog.xml")
Load the XSL
var xsl = new ActiveXObject ("Microsoft.XMLDOM")
Xsl.async = False
Xsl.load ("cd_catalog_if.xsl")
Transform
document.write (Xml.transformnode (XSL))
</script>
</body>
If you are using Internet Explorer 5.0 or later, please click here to view the results.
XSL Conditional selection Choose
XSL can filter XML documents using conditional selection.
Where to place selection criteria
Take a look at the XML documents that you've seen almost every previous chapter:
<?xml version= "1.0"?>
<CATALOG>
<CD>
<title>empire burlesque</title>
<artist>bob dylan</artist>
<COUNTRY> USA </COUNTRY>
<COMPANY> Columbia </COMPANY>
<PRICE>10.90</PRICE>
<YEAR>1985</YEAR>
</CD>
.
.
.
To insert a conditional selection test on the contents of a file, simply add the Xsl:choose, Xsl:when, and xsl:otherwise elements to the XSL document as follows:
<xsl:choose>
<xsl:when match= ". [artist= ' Bob Dylan '] >
... Some code ...
</xsl:when>
<xsl:otherwise>
... Some code ...
</xsl:otherwise>
</xsl:choose>
Now let's look at the slightly resized XSL style sheet:
<?xml version= ' 1.0 '?>
<xsl:stylesheet xmlns:xsl= "Http://www.w3.org/TR/WD-xsl" >
<xsl:template match= "/" >
<body>
<table border= "2" bgcolor= "Yellow" >
<tr>
<th>Title</th>
<th>Artist</th>
</tr>
<xsl:for-each select= "CATALOG/CD" >
<tr>
<td><xsl:value-of select= "TITLE"/></td>
<xsl:choose>
<xsl:when match= ". [artist= ' Bob Dylan '] >
<TD bgcolor= "#ff0000" >
<xsl:value-of select= "ARTIST"/>
</td>
</xsl:when>
<xsl:otherwise>
<td><xsl:value-of select= "ARTIST"/></td>
</xsl:otherwise>
</xsl:choose>
</tr>
</xsl:for-each>
</table>
</body>
</xsl:template>
</xsl:stylesheet>
Converting in Browser
The following are the simple code needed to convert an XML file into HTML in a browser:
<body>
<script language= "JavaScript" >
Load XML
var xml = new ActiveXObject ("Microsoft.XMLDOM")
Xml.async = False
Xml.load ("Cd_catalog.xml")
Load the XSL
var xsl = new ActiveXObject ("Microsoft.XMLDOM")
Xsl.async = False
Xsl.load ("cd_catalog_choose.xsl")
Transform
document.write (Xml.transformnode (XSL))
</script>
</body>
If you are using Internet Explorer 5.0 or later, please click here to view the results.
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