I am looking to pre-fill/pre-populate a checkbox on my Visualforce page based on a specific picklist condition being met.

In this example, I would like the "ClearingHouse__c" checkbox to be automatically checked on the page if the "Type__c" picklist = "Omega".

Is this possible?

 <apex:column headerValue="Type">
   <apex:inputField value="{!a.Condition.Type__c}">
      <apex:actionSupport event="onchange" rerender="table"/>

 <apex:column headerValue="Clearing House">
   <apex:inputCheckbox value="{!a.Condition.ClearingHouse__c}"/>
     <apex:actionSupport event="onclick" rerender="table"/>

1 Answer 1


Yes, you can do this in both Apex or JavaScript.

As Apex:

  <apex:actionSupport event="onchange" rerender="table" action="{!a.checkType}" />


public void checkType() {
  if(Condition.Type__c=='Omega') {


(Note: the code above presumes you have a wrapper class; this method goes in the wrapper.)

As JavaScript:



function updateCheckbox(id) {
  var type = document.querySelector(`[data-record-id="${id}"]`);
  var clearinghouse = document.querySelector(`[data-update-id="${id}"]`);
  clearinghouse.checked = type.options[type.selectedIndex].value === 'Omega';


((Note: it's been a while since I've written Visualforce+JS, this might need some debugging))

Side Note:

apex:actionSupport must be inside the element it is providing support for. This might be part of your problem.

<apex:inputCheckbox value="{!a.Condition.ClearingHouse__c}">
  <apex:actionSupport event="onclick" rerender="table"/>
  • Thanks for the feedback sfdcfox. How does the javascript function know how to reference the correct "clearinghouse" field in Salesforce?
    – FWSFDC
    Feb 26, 2020 at 22:21
  • Also, the Apex/VF approach does not seem to be working and the inputcheckbox remains unchecked. I do have a wrapper class and here is the method public pagereference checkType() { if(Condition.Type__c == 'Omega') { Condition.Clearinghouse__c=TRUE; } return null; }
    – FWSFDC
    Feb 27, 2020 at 3:14
  • Visualforce markup: <apex:column headerValue="Type" > <apex:inputField value="{!a.Condition.Type__c}"> <apex:actionSupport event="onchange" rerender="table"/> </apex:inputField> </apex:column> <apex:column headerValue="Clearing House"> <apex:inputCheckbox value="{!a.Condition.Clearinghouse__c}"/> <apex:actionSupport event="onclick" rerender="table" action="{!checkType}"/> </apex:column>
    – FWSFDC
    Feb 27, 2020 at 3:16

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