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4/8/2010

Provides multiple conditional testing in conjunction with the <xsl:choose> and <xsl:otherwise> elements.

Syntax 

<xsl:when
  test = 
boolean expression>
</xsl:when>

Attributes

test

[required] The condition in the source data to test. If the expression in this attribute evaluates to True when cast to a Boolean, the contents of <xsl:when> are placed in the output. Node-sets are cast to a Boolean True if they contain at least one node.

Element Information

Remarks

Describes one of the alternatives to be chosen by the < xsl:choose> element. The default alternative is described by the < xsl:otherwise> element.

For simple conditional testing, use the < xsl:if> element.

Example

This example shows a template for "order" elements and inserts an <HR> or <BR> before the order's contents, based on the order's "total" element value. If the total is less than 10, a red <HR> will be generated; if the total is less than 20, a pink <HR> will be generated; otherwise a <BR> element will be created.
Copy Code 
<xsl:template match="order">
   <xsl:choose>
	<xsl:when test="total &lt; 10">
		 <HR STYLE="color:red"/>
	</xsl:when>
	<xsl:when test="total &lt; 20">
		 <HR STYLE="color:pink"/>
	</xsl:when>
	<xsl:otherwise>
		 <BR/>
	</xsl:otherwise>
   </xsl:choose>
   <xsl:apply-templates />
</xsl:template>

See Also