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dhcrusoedhcrusoe 

Simple APEX IF Statement - What's wrong with this?

Hey there,

 

I'm trying to display a print button IF there is certain information in the URL string, e.g., an ?id= field. Here's my statement:

 

 

rendered="{!IF({!id} != 'null', true, false)}
 
 Clearly, it didn't like this... any suggestions to fix? Thanks!
 
--Dave 
 
p.s. here's the entire element:
 
 
<apex:outputLink rendered="{!IF(id != 'null', true, false)}" target="_blank" value="/apex/CTN_Lessons_37p?apprenticeshipId={!apprenticeshipID}&ctContactId={!ctContactId}&id={!id}">Print My Lesson</apex:outputLink>
 
 
 
 


dhcrusoedhcrusoe
p.s. also trying... 
 
{!IF({!$CurrentPage.parameters.id}
 e.g.,
 
 
rendered="{!IF(($CurrentPage.Parameters.id != 'null'), false, true)}"
 
 
 
 
neither of which which seem to work... 
 
 
Message Edited by dhcrusoe on  06-01-2009 09:12 AM


dhcrusoedhcrusoe
All, 
 
This seems to work -- any way to improve it? 
 
<apex:outputLink rendered="{!IF(($CurrentPage.parameters.id != ''), true, false)}" target="_blank" value="/apex/CTN_Lessons_37p?apprenticeshipId={!apprenticeshipID}&ctContactId={!ctContactId}&id={!id}">Print My Lesson</apex:outputLink>
 
 
 


ahab1372ahab1372
does ISNULL work?


lukaz1010lukaz1010
I'd try ternary operator:

rendered="{! ({!id} != 'null') ? true : false }"
 




craigmhcraigmh
rendered="{!(id != null)}"


 


Just use the comparison.