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display multiselect on selection of dependent picklist in visualforce page

Hi All,

I have a requrirement where

1. I have an object O1 and fields like Name, F1, F2, F3 are as dependent picklist. F2 is dependent in F1 and F3 is dependent on F2.
2. I want to display all the Names in a multiselect list when F1, F2, F3 is selected.

Now I am only displaying all the picklist in vf page. Need help in displaying name as multiselect list .

Below is the code i am trying to do - 
Apex Class - 

public with sharing class soption{

      public List<MSA__C> records{get;set;}
      public MSA__c objAct{get;set;}

    public soption(ApexPages.StandardController controller) {
        objAct = new MSA__C();
     public pagereference search()
       records=[Select ID,Name,Coe__c,Dept__c,OpCo__c from MSA__C  where Coe__c=: objAct.Coe__c and Dept__c=: objAct.Dept__c];

       return null;


Vf Page - 

<apex:page standardController="MSA__c" extensions="soption" sidebar="false"> 

      <apex:messages style="color:red"></apex:messages>
        <apex:form id="theform">

            <apex:pageblock  mode="edit">

                <apex:pageblockSection >
                   <apex:inputfield value="{!objAct.Coe__c}" />
                   <apex:inputfield value="{!objAct.Dept__c}" />
                   <apex:inputfield value="{!objAct.OpCo__c }" />




rajesh gandirajesh gandi
i think below url is useful you

Please select this answer is useful you
Ajay K DubediAjay K Dubedi
I am not actually getting your question but if you want to make a dependent picklist than you can take help from the below link