"choose, when, otherwise"

natjimy · December 13th, 2004, 04:12 AM

Hi,

I'm trying to creating an xslt. Now I've got these tags in xslt (just a short example):

Code:

<xsl:for-each select="./statistics/param">
<td><xsl:value-of select="@nRecs"/></td>
</xsl:for-each>

What I'm trying to do is, that the <xsl:value-of select="@nRecs"/> - tag should only be displayed when it contains something, if it's empty it should show <td> </td>. Here's an example of my idea:

Code:

<xsl:choose>
<xsl:when <xsl:value-of select="@nRecs"/> = " ">
 <td><xsl:value-of select="@nRecs"/></td>
</xsl:when>
<xsl:otherwise>
  <td>&nbsp;</td>
</xsl:otherwise>
</xsl:choose>

Now, of course this is not working, but how exactly do I put the value-of in the when-condition?

Thanks for your help!

Santhi · December 13th, 2004, 09:24 AM

Hi,
   You should put
        <xsl:when test='@nRecs=""' >
instead of
       <xsl:when <xsl:value-of select="@nRecs"/> = " ">

joefawcett · December 13th, 2004, 09:52 AM

And nbsp isn't a built-in entity, use

Code:

#xa0;

(&-#-x-a-0-;) instead.

--

Joe (Microsoft MVP - XML)

natjimy · December 13th, 2004, 09:54 AM

Hi Santhi,

thanks for your reply. I tried it (and it would work), but I found out that my whole idea is not working.

But I still got this issue. My problem is the following:

I've got an xml-file like this (just an example to show the idea):

Code:

<statistics>
 <param nRecs="0">
 </param>
 <param1 nRecs = "0">
 </param1>
</statistics>

<statistics>
 <param1 nRecs = "0">
 </param1>
</statistics>

As you can see, one of the <statistics>-tags is containing the <param>-tag one of them not. In my xslt I created a table, where the rows are printed in the for-each-loops:

Code:

<table>
<tr>
<td>param</td>
<td>param1</td>
</tr>
<tr>
<xsl:for-each select="./statistics/param">
   <td><xsl:value-of select="@nRecs"/></td>
</xsl:for-each>
<xsl:for-each select="./statistics/param1">
  <td><xsl:value-of select="@nRecs"/></td>
</xsl:for-each>
</tr>
<table>

Now, the problem is that if the param-tag is missing, it won't print out anything. How can I check, if the param-tag is there?

Thanks for any help!!

natjimy · December 13th, 2004, 09:56 AM

thanks joefawcett,
That explaines why it printed out the  . sorry for all those silly questions but I'm a total newbie to xsl/xml

joefawcett · December 13th, 2004, 10:06 AM

I think your loop is too "low down":

Code:

<table>
<tr>
<td>param</td>
<td>param1</td>
</tr>
<xsl:for-each select="statistics">
<tr>
<td>
<xsl:choose>
<xsl:when test="param">
<xsl:value-of select="param/@nRecs"/>
</xsl:when>
<xsl:otherwise>#xa0;</xsl:otherwise>
</xsl:choose>
</td>
<td>
<xsl:choose>
<xsl:when test="param1">
<xsl:value-of select="param1/@nRecs"/>
</xsl:when>
<xsl:otherwise>#xa0;</xsl:otherwise>
</xsl:choose>
</td>
</tr>
</xsl:for-each>
</table>

--

Joe (Microsoft MVP - XML)

natjimy · December 13th, 2004, 10:22 AM

Thanks a lot joefawcett,
It was really the problem of the loop being too "low down". Now it works!!! :D Thanks so much!!

Vadivel · December 17th, 2004, 01:43 AM

Other way of using space in xslt: <xsl:text disable-output-escaping="yes">&nbsp;</xsl:text>

Best Regards
Vadivel

MVP ASP/ASP.NET
http://vadivel.thinkingms.com

joefawcett · December 17th, 2004, 02:22 PM

disable-output-escaping is not supported in all processors. Why use a kludge when there are built in methods that work?

--

Joe (Microsoft MVP - XML)