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TagExists in XSLT template

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Posted on 18/08/2010 15:57:37

Hi there,

Is it possible to check if a certain tag is in use in an XSLT template? With loops you can use the availableloops approach, but is there tag equivalent?

BR.
Lars


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Posted on 18/08/2010 17:49:48
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Hi,

There is no tag, but you can use some xslt functions, for example

<xsl:if test=" MyTag != '' ">
  // do something
</xsl:if>

<xsl:if test="string-length(MyTag) > 0">
  // do something
</xsl:if>

Best Regard,
Nuno
 
Posted on 19/08/2010 08:52:30
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Hi Nuno,

I need it the other way around. I want my C# code to check whether a certain tag is used in the XSLT template.

But thanks anyway;-)

BR.
Lars
 
Nicolai Høeg Pedersen
Posted on 19/08/2010 09:06:10
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From code use tagexist or loopexist.

Loopexist with xslt requires the "available loops" approach in some situations, but with normal "template tags" like <xsl:value-of select="@MenuText" disable-output-escaping="yes"/>, just use tagexist.
 
Posted on 19/08/2010 11:59:23
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I tried that to begin with, but in an XSLT template it returns true every time. At least that's what I've experienced. Just to make sure, I tried the following:

Base.wa(Template.TagExists("Yadayada"));

The result was an alert box with the text True:

<script>alert('True');</script><br />

BR.
Lars

 
Posted on 19/08/2010 14:23:07
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Btw. LoopExists works perfectly for this, but TagExists would be much prettier, since it's just a tag and not a loop:)

/Lars
 
Nicolai Høeg Pedersen
Posted on 19/08/2010 14:50:18
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Well

Just checked out the code, and there is an issue. I've bugged it, so a fix is coming up.

Untill then do something like this:

If (t.IsXsltTemplate AndAlso t.Html.Contains("@MenuText")) OrElse t.TagExists("MenuText") Then
 t.SetTag("MenuText", LongRunningThing())
End If

 

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