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  • Andrew Blackmore 84 posts 127 karma points
    Mar 03, 2010 @ 21:39
    Andrew Blackmore
    0

    Emulating a loop in XSLT

    Hi All,

    I have a situation where it would be very helpful to use a loop but I don't really get how to in XSLT. I have this simple template and what I would like to do is have it continue looping until it finds no more blogImageList_images or hits a point (10 images or so).

    <xsl:template match="/">
        <xsl:if test="$currentPage/data [@alias='blogImageList_image1'] != ''">
          <a>
            <xsl:attribute name="href">
              <xsl:value-of select="umbraco.library:NiceUrl($currentPage/data [@alias = 'blogImageList_url1'])" disable-output-escaping="yes"/>
            </xsl:attribute>
            <img alt="{$currentPage/@nodeName}" class="blogImageList">
              <xsl:attribute name="src">
                <xsl:value-of select="umbraco.library:GetMedia($currentPage/data [@alias='blogImageList_image1'], 'false')/data [@alias = 'umbracoFile']" />
              </xsl:attribute>
            </img>
          </a>
          <br />
          <a>
            <xsl:attribute name="href">
              <xsl:value-of select="umbraco.library:NiceUrl($currentPage/data [@alias = 'blogImageList_url1'])" disable-output-escaping="yes"/>
            </xsl:attribute>
            <xsl:value-of select="$currentPage/data [@alias = 'blogImagesList_title1']"/>
          </a>
        </xsl:if>
    </xsl:template>

    I know that if it were in another language I would need to do something like

         for( i=0, 10, i !='' )

    {

    call template and i++;

    }

     

    I know XSLT doesn't work like that persay but I'm not truely understanding the best way to tackle this.

  • dandrayne 1138 posts 2262 karma points
    Mar 03, 2010 @ 21:44
    dandrayne
    0

    I found this online somewhere for a project a while back

    <xsl:template name="for.loop">

    <xsl:param name="i" />
    <xsl:param name="count" />
    <!--begin_: Line_by_Line_Output -->
    <xsl:if test="$i &lt;= $count">
    <option value="{$i}">
    <xsl:if test="$eventMinBreakoutRooms = $i">
    <xsl:attribute name="selected">selected</xsl:attribute>
    </xsl:if>
    <xsl:value-of select="$i" />
    </option>
    </xsl:if>

    <!--begin_: RepeatTheLoopUntilFinished-->
    <xsl:if test="$i &lt;= $count">
    <xsl:call-template name="for.loop">
    <xsl:with-param name="i">
    <xsl:value-of select="$i + 1"/>
    </xsl:with-param>
    <xsl:with-param name="count">
    <xsl:value-of select="$count"/>
    </xsl:with-param>
    </xsl:call-template>
    </xsl:if>

    </xsl:template>


    <xsl:call-template name="for.loop">
    <xsl:with-param name="i">0</xsl:with-param>
    <xsl:with-param name="count">10</xsl:with-param>
    </xsl:call-template>

    Dn

  • Kim Andersen 1447 posts 2196 karma points MVP
    Mar 03, 2010 @ 21:48
    Kim Andersen
    0

    Hi Andrew

    In XSLT a loop is created with a for-each. Like this:

    <xsl:for-each select="$currentPage/node">
        Your code here...
    </xsl:for-each>

    Right now I don't know how your document type is build, so it's a little difficult to give you the excact code in your example. But the code above will loop for as many times, as the number of child-nodes that the current page has. So if the current page have got four children, the loop will loop four times. Hopes this makes sense to you.

    /Kim A

  • Andrew Blackmore 84 posts 127 karma points
    Mar 03, 2010 @ 21:55
    Andrew Blackmore
    0

    Thanks guys

  • Chriztian Steinmeier 2798 posts 8788 karma points MVP 8x admin c-trib
    Mar 03, 2010 @ 22:29
    Chriztian Steinmeier
    1

    Hi Andrew,

    This is how I'd do something like what you're trying to accomplish:

    <?xml version="1.0" encoding="utf-8" ?>
    <xsl:stylesheet
        version="1.0"
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
        xmlns:umbraco.library="urn:umbraco.library"
        exclude-result-prefixes="umbraco.library"
    >
    
        <xsl:output method="xml" indent="yes" omit-xml-declaration="yes" />
    
        <xsl:param name="currentPage" />
    
        <xsl:variable name="maxImageListImages" select="10" />
    
        <xsl:template match="/">
            <xsl:call-template name="outputImageListImage">
                <xsl:with-param name="node" select="$currentPage" />
            </xsl:call-template>
        </xsl:template>
    
    
        <xsl:template name="outputImageListImage">
            <xsl:param name="node" select="." /><!-- Makes it possible to call this from a for-each/apply-templates without even specifying the node -->
            <xsl:param name="index" select="1" /><!-- Assign default value if none was passed -->
    
            <xsl:variable name="mediaID" select="$node/data[@alias = concat('blogImageList_image', $index)]" />
            <xsl:variable name="linkID" select="$node/data[@alias = concat('blogImageList_url', $index)]" />
            <xsl:variable name="src" select="umbraco.library:GetMedia($mediaID, false())/data[@alias = 'umbracoFile']" />
    
            <xsl:if test="number($linkID) and normalize-space($src)">
                <xsl:variable name="url" select="umbraco.library:NiceUrl(linkID)" />
    
                <a href="{$url}">
                    <img class="blogImageList" alt="{$node/@nodeName}" src="{$src}" />
                </a>
                <br />
                <a href="{$url}">
                    <xsl:value-of select="$node/data[@alias = concat('blogImagesList_title', $index)]" />
                </a>
            </xsl:if>
    
            <xsl:if test="$index &lt;= $maxImageListImages">
                <!-- Call myself with the next index -->
                <xsl:call-template name="outputImageListImage">
                    <xsl:with-param name="index" select="$index + 1" />
                </xsl:call-template>
            </xsl:if>
        </xsl:template>
    
    </xsl:stylesheet>

    Feel free to ask about what's going on, if you like...  

    /Chriztian

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