I am trying to implement an if -else statement in XSLT but my code just doesn't parse. Does anyone have any ideas?
<xsl:variable name="CreatedDate" select="@createDate"/> <xsl:variable name="IDAppendedDate" select="2012-01-01" /> <b>date: <xsl:value-of select="$CreatedDate"/></b> <xsl:if test="$CreatedDate > $IDAppendedDate"> <h2> mooooooooooooo </h2> </xsl:if> <xsl:else> <h2> dooooooooooooo </h2> </xsl:else> 5 Answers
You have to reimplement it using <xsl:choose> tag:
<xsl:choose> <xsl:when test="$CreatedDate > $IDAppendedDate"> <h2> mooooooooooooo </h2> </xsl:when> <xsl:otherwise> <h2> dooooooooooooo </h2> </xsl:otherwise> </xsl:choose> If statement is used for checking just one condition quickly. When you have multiple options, use <xsl:choose> as illustrated below:
<xsl:choose> <xsl:when test="$CreatedDate > $IDAppendedDate"> <h2>mooooooooooooo</h2> </xsl:when> <xsl:otherwise> <h2>dooooooooooooo</h2> </xsl:otherwise> </xsl:choose> Also, you can use multiple <xsl:when> tags to express If .. Else If or Switch patterns as illustrated below:
<xsl:choose> <xsl:when test="$CreatedDate > $IDAppendedDate"> <h2>mooooooooooooo</h2> </xsl:when> <xsl:when test="$CreatedDate = $IDAppendedDate"> <h2>booooooooooooo</h2> </xsl:when> <xsl:otherwise> <h2>dooooooooooooo</h2> </xsl:otherwise> </xsl:choose> The previous example would be equivalent to the pseudocode below:
if ($CreatedDate > $IDAppendedDate) { output: <h2>mooooooooooooo</h2> } else if ($CreatedDate = $IDAppendedDate) { output: <h2>booooooooooooo</h2> } else { output: <h2>dooooooooooooo</h2> } If I may offer some suggestions (two years later but hopefully helpful to future readers):
- Factor out the common
h2element. - Factor out the common
oooooooooooootext. - Be aware of new XPath 2.0
if/then/elseconstruct if using XSLT 2.0.
XSLT 1.0 Solution (also works with XSLT 2.0)
<h2> <xsl:choose> <xsl:when test="$CreatedDate > $IDAppendedDate">m</xsl:when> <xsl:otherwise>d</xsl:otherwise> </xsl:choose> ooooooooooooo </h2> XSLT 2.0 Solution
<h2> <xsl:value-of select="if ($CreatedDate > $IDAppendedDate) then 'm' else 'd'"/> ooooooooooooo </h2> Originally from this blog post. We can achieve if else by using below code
<xsl:choose> <xsl:when test="something to test"> </xsl:when> <xsl:otherwise> </xsl:otherwise> </xsl:choose> So here is what I did
<h3>System</h3> <xsl:choose> <xsl:when test="autoIncludeSystem/autoincludesystem_info/@mdate"> <!-- if attribute exists--> <p> <dd><table border="1"> <tbody> <tr> <th>File Name</th> <th>File Size</th> <th>Date</th> <th>Time</th> <th>AM/PM</th> </tr> <xsl:for-each select="autoIncludeSystem/autoincludesystem_info"> <tr> <td valign="top" ><xsl:value-of select="@filename"/></td> <td valign="top" ><xsl:value-of select="@filesize"/></td> <td valign="top" ><xsl:value-of select="@mdate"/></td> <td valign="top" ><xsl:value-of select="@mtime"/></td> <td valign="top" ><xsl:value-of select="@ampm"/></td> </tr> </xsl:for-each> </tbody> </table> </dd> </p> </xsl:when> <xsl:otherwise> <!-- if attribute does not exists --> <dd><pre> <xsl:value-of select="autoIncludeSystem"/><br/> </pre></dd> <br/> </xsl:otherwise> </xsl:choose> My Output
The most straight-forward approach is to do a second if-test but with the condition inverted. This technique is shorter, easier on the eyes, and easier to get right than a choose-when-otherwise nested block:
<xsl:variable name="CreatedDate" select="@createDate"/> <xsl:variable name="IDAppendedDate" select="2012-01-01" /> <b>date: <xsl:value-of select="$CreatedDate"/></b> <xsl:if test="$CreatedDate > $IDAppendedDate"> <h2> mooooooooooooo </h2> </xsl:if> <xsl:if test="$CreatedDate <= $IDAppendedDate"> <h2> dooooooooooooo </h2> </xsl:if> Here's a real-world example of the technique being used in the style-sheet for a government website:
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