function readOnly(count){ }
Sign Up ›
Starting November 20, the site will be set to read-only. On December 4, 2023,
forum discussions will move to the Trailblazer Community.
Learn More

Browse by Topic
ShowAll Questionssorted byDate Posted
+ Start a Discussion
dawnzdydawnzdy 

How to display error msg on visualforce page through catch {}

Hi Everyone,
 
   I am trying to display error msg on visualforce page when a var may cause exception.          Using <ApexPages.addMessage>  in the controller, and  <Apex:pageMessages/> on the page  is working fine when I check the value first like this.
   
    

i = 0;
if (i==0){       
    ApexPages.addMessage(new  ApexPages.Message(ApexPages.Severity.ERROR,'works in if'));      
    return null;     
}    
return 5/i; 
 

 
     But what I really want is to catch the exception and display this message instead of checking value first.
 
    
  i = 0;  
  try{        
     return 5/i;  
  }catch(Exception ex){            
     ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'why not working here?'+ex));         
     return null;  
}
 
 
 
      Seems this is not working, and I still get the standard error msg page complaining divided by 0. Did I miss anything here or this is how visualforce page error msg should work?
 
Thanks,
Dawn 
Message Edited by dawnzdy on  11-23-2009 07:40 PM


Best Answer chosen by Admin (Salesforce Developers) 
David VPDavid VP
Try this :
 
 
i = 0;

try{
   Double d = 5/i;
   return d;
}catch(Exception ex){

   ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'why not working here?'+ex));

   return null;

}
 
 
 


All Answers
David VPDavid VP
Try this :
 
 
i = 0;

try{
   Double d = 5/i;
   return d;
}catch(Exception ex){

   ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'why not working here?'+ex));

   return null;

}
 
 
 
This was selected as the best answer
dawnzdydawnzdy
Wow, amzing!
Thank you very much, it works perfectly!