how can i add an if statement - XSLT

Go to solution

Press Ctrl / CMD + C to copy this to your clipboard.

Copied to clipboard

Flag this post as spam?

This post will be reported to the moderators as potential spam to be looked at

Donald Swofford 13 posts 107 karma points

Aug 08, 2014 @ 00:38

0

How can I add an if statement?

XSLT

I am using the List_Sub_Pages_By_Level macro and was wondering how I can show a headerimage only if there are results? Below is what I have so far:

<xsl:if test="SomeExpression">

<img src="http://myheaderimage.png"/>

</xsl:if>

<ul>

<xsl:for-each select="$currentPage/ancestor-or-self::* [@level=$level]/* [@isDoc and string(umbracoNaviHide) != '1']">

<li>

<a href="{umbraco.library:NiceUrl(@id)}">

<xsl:value-of select="@nodeName"/>

</a>

</li>

</xsl:for-each>

</ul>

Copy Link
Dirk De Grave 4541 posts 6021 karma points MVP 3x admin c-trib

Aug 08, 2014 @ 08:00
3
you can perform a count() on your for-each expression to check if there are results and show if count() > 0
```
<xls:if test="count($currentPage/ancestor-or-self::* [@level=$level]/* [@isDoc and string(umbracoNaviHide) != '1']) > 0">
<img src="..." />
</xsl:if>
```
Cheers,

Dirk
Copy Link
Dennis Aaen 4499 posts 18254 karma points admin hq c-trib

Aug 08, 2014 @ 08:06
2
Hi Donald.

When you are saying results, did you mean childs, if so I think that you could something like this.
```
<xsl:variable name="count" select="count($currentPage/ancestor-or-self::* [@level=$level]/* [@isDoc and string(umbracoNaviHide) != '1'])" />

<xsl:if test="$count > 0">
    <img src="http://myheaderimage.png"/>
</xsl:if>
```
If you are getting the image from Umbraco by a media picker and want to be possible to set an image each page you can do something like:
```
<xsl:variable name="media" select="umbraco.library:GetMedia($currentPage/bannerImage, 0)" />

<xsl:if test="$media">
    <xsl:variable name="url" select="$media/umbracoFile" />
    <xsl:variable name="width" select="$media/umbracoWidth" />
    <xsl:variable name="height" select="$media/umbracoHeight" />
        <img src="{$url}" width="{$width}" height="{$height}" />
 </xsl:if>
```
Where the bannerImage is the alias of your property, for the media picker. the documentation for the Media Picker http://our.umbraco.org/documentation/using-umbraco/backoffice-overview/property-editors/built-in-property-editors/Media-Picker and GetMedia library method can be found here: http://our.umbraco.org/wiki/reference/umbracolibrary/getmedia

And as you probably know there are some different axes in Umbraco parent, children ect. http://our.umbraco.org/wiki/reference/xslt/xpath-axes-and-their-shortcuts

And here is the documentation of what Currentpage represent: http://our.umbraco.org/wiki/reference/xslt/understanding-currentpage

Hope this can help you in the right direction.

/Dennis
Copy Link
Chriztian Steinmeier 2798 posts 8788 karma points MVP 7x admin c-trib

Aug 08, 2014 @ 10:19
100
Hi Donald,

I'm guessing you want to only show the header image if the for-each expression following it will output something, right?

In that case, it's very important that you store that result in a variable so you're not repeating it (true for any language, really - not just XSLT) - otherwise, when you (or someone else in a month) need to change the expression, it's very easy to forget to change it in the if statement as well, especially if the header image becomes a header section - you know how it goes :)

I'd do more than one, actually:
```
<xsl:variable name="startNode" select="$currentPage/ancestor-or-self::*[@level = $level]" />
<xsl:variable name="nodesToShow" select="$startNode/*[@isDoc][not(umbracoNaviHide = 1)]" />

<xsl:if test="$nodesToShow">
    <img src="http://myheaderimage.png" />

    <ul>
        <xsl:for-each select="$nodesToShow">
            <li>
                <a href="{umbraco.library:NiceUrl(@id)}">
                    <xsl:value-of select="@nodeName" />
                </a>
            </li>
        </xsl:for-each>
    </ul>
</xsl:if>
```
I've also put the <ul> inside the if statement because you normally wouldn't want an empty <ul /> in the output anyway. (But you example may have been shortened for this post of course, in which case you should ignore that).

/Chriztian
Copy Link
Donald Swofford 13 posts 107 karma points

Aug 08, 2014 @ 13:14

0

Thanks guys. Dirk I was getting some error so I tried Chriztians solution and it worked so I marked it solved. I really appreciate the very helpful community here.

Copy Link
Dirk De Grave 4541 posts 6021 karma points MVP 3x admin c-trib

Aug 08, 2014 @ 13:31

0

you got it working, that's the important thing!, at least you get to experience a great community ;)

Copy Link
is working on a reply...

Please Sign in or register to post replies

Flag this post as spam?

How can I add an if statement?