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Constructing <selectOption> dynamically

Hi all,

 

I am trying to construct a <selectOption> dynamically by reading the values from a custom object which will be displayed in VF page.

 

Here is my code:

 

 

public List<SelectOption> getZipList () 
	{
		     List<SelectOption> zipList = new List<SelectOption>(); 
			 List<Zip_List__c> zipListObj= new  List<Zip_List__c>();
			 zipListObj = [Select Name From Zip_List__c];
      
for (integer i=0;i<zipListObj.size;i++)
	{  
		zipList.add(new SelectOption(zipListObj[i],zipListObj[i]));   
	}

	}
 When I try to save the controller, it throws:
 
 Error:
Compile Error: Constructor not defined:
[System.SelectOption].<Constructor>(SOBJECT:Zip_List__c,
SOBJECT:Zip_List__c) 
 
If I hardcode the values in " zipList.add(new SelectOption(zipListObj[i],zipListObj[i])); ", it is working fine for me,
 
Please advice. 
 
Thanks in Advance 
 


Best Answer chosen by Admin (Salesforce Developers) 
jeffdonthemic2jeffdonthemic2
Here's a code snippet that might help:
 
 
    public List<SelectOption> getLevel1Items() {        List<SelectOption> options = new List<SelectOption>();               options.add(new SelectOption('','-- Choose a Group --'));        for (Service_Group__c g : [select Id, Name, Grp_ID__c from Service_Group__c Order By Name]) {            options.add(new SelectOption(g.Id,g.Grp_ID__c+' - '+g.Name));        }               return options;    }
 
 
 
 Jeff Douglas
Appirio, Inc.
http://blog.jeffdouglas.com 
 


All Answers
jeffdonthemic2jeffdonthemic2
Here's a code snippet that might help:
 
 
    public List<SelectOption> getLevel1Items() {        List<SelectOption> options = new List<SelectOption>();               options.add(new SelectOption('','-- Choose a Group --'));        for (Service_Group__c g : [select Id, Name, Grp_ID__c from Service_Group__c Order By Name]) {            options.add(new SelectOption(g.Id,g.Grp_ID__c+' - '+g.Name));        }               return options;    }
 
 
 
 Jeff Douglas
Appirio, Inc.
http://blog.jeffdouglas.com 
 
This was selected as the best answer
Sivakumari2iSivakumari2i

Hi,
Here's a code snippet i used similar to your last post.
But i am getting a error as "Error: Compile Error: Method does not exist or incorrect signature: options.add(System.SelectOption) at line 9 column 11"
 
public class picklistTest
{
    public List<SelectOption> getOptions2()
    {
        List<SelectOption> retVal = new List<SelectOption>();
        retVal.add(new SelectOption('','-- Choose a Group --'));        
        for(Period a : [Select Id, type, Number, CALENDAR_YEAR(StartDate) s from Period where Id in (Select PeriodId from ForecastingQuota)])
        {
          options.add(new SelectOption(a.Id,a.type+' - '+a.Number));                 
        }
        return retVal;
    }
}
 

Please help me.
 
Regards,
S.Sivakumar


Sivakumari2iSivakumari2i
I found the error in my code snippet
Thanks for your help


B. Wade LovellB. Wade Lovell
The error was here:
{
          retVal.add(new SelectOption(a.Id,a.type+' - '+a.Number));                 
        }
        return retVal;
    }
}

In this case, the OP had 
options.add(new SelectOption(a.Id,a.type+' - '+a.Number)); instead of 
retVal.add(new SelectOption(a.Id,a.type+' - '+a.Number));