CODEWITHSUNDEEP
xmlxsltxpath
chansey
chansey

Reputation: 1409

Does XPath support else-if statement?

Recently, I wrote some personal programs using XSLT. I am surprised that XPATH has 'if then else' statement, no 'else if'.

For example, I can only use:

if *** then ***
else ***

but I can't use:

if *** then ***
else if *** then ***
else ***

Does XPath support else-if statement? The only way to simulate else-if is nesting if else?

Upvotes: 1

Views: 4931

Answers (2)

Michael Kay
Michael Kay

Reputation: 163322

An expression such as

if (x=3) 
  then 1 
else if (x=4) 
  then 5 
else 6

is perfectly legal in XPath 2.0.

Upvotes: 8

Kirill Polishchuk
Kirill Polishchuk

Reputation: 56162

You can use xsl:choose

The xsl:choose element selects one among a number of possible alternatives. It consists of a sequence of one or more xsl:when elements followed by an optional xsl:otherwise element. Each xsl:when element has a single attribute, test, which specifies an expression. The content of the xsl:when and xsl:otherwise elements is a sequence constructor.

When an xsl:choose element is processed, each of the xsl:when elements is tested in turn (that is, in the order that the elements appear in the stylesheet), until one of the xsl:when elements is satisfied. If none of the xsl:when elements is satisfied, then the xsl:otherwise element is considered, as described below.

<xsl:choose>
  <xsl:when test="expression1">
    ... some output ...
  </xsl:when>
  <xsl:when test="expression2">
    ... some output ...
  </xsl:when>
  <xsl:otherwise>
    ... some output ....
  </xsl:otherwise>
</xsl:choose>

Upvotes: 0

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