pc:switch

note

This article is about the pc:switch Blend directive.

pc:switch

Executes different actions depending on the value of a variable.

Returns a text string or an XML fragment.

Syntax

<pc:switch select="*variable-reference*">
   [     <pc:case value="*xpath*"> *content* </pc:case>
         ...   ]
         <pc:default> *content* </pc:default>
</pc:switch>

The required select attribute could be any XPath expression, but is typically a variable reference to the variable that you want to test the value of.

Each of the pc:case child elements has a required value attribute. If the value of pc:switch's select attribute matches the value of this attribute, then the child element's content is executed. If there are multiple matches, they are all executed, in the document order in which the matching pc:case elements appear.

If the optional pc:default element is present, its content is executed if none of the pc:each elements has a matching value. This happens regardless of whether pc:case elements occur before or after the pc:default element, or both.

Example

<example xmlns:pc="Processing.Command">
       <pc:switch select="$x">
             <pc:case value="john">the name is John</pc:case>
             <pc:case value="mary"><pc:value-of select="strings:TitleCase($x)"/></pc:case>
             <pc:case value="mary"> is the name</pc:case>
             <pc:default><pc:value-of select="$x"/> was not matched</pc:default>
             <pc:case value="{$y}"> x matches y </pc:case>
       </pc:switch>
</example>

The outcome is as follows:

Value of $x	Value of $y	Outcome
(empty, not supplied)		was not matched
john	mary	the name is John
mary		Mary is the name
kajsa		kajsa was not matched
john	john	the name is John x matches y
johnn		johnn was not matched
johnn	johnn	x matches y