Click this button should rerender my output panel and display the latest saved value - correct?

<apex:page standardController="Reject_Lead__c"  cache="false" showHeader="true" sidebar="true">
<apex:form >  
       <apex:outputPanel id="thePanel">
            <apex:outputField value="{!Reject_Lead__c.RL_LeadStatus__c}"/>

    <apex:commandButton action="{!null}" rerender="thePanel" value="FIRE!"/>

Any ideas?

3 Answers 3


The documentation for the action attribute on apex:commandButton states:

If an action isn't specified, the page simply refreshes

So all you need to do is remove action="{!null}" from your command button as shown below:

<apex:commandButton rerender="thePanel" value="FIRE!"/>

While this seems to be fine


your action function


looks very strange to me. Rerender is coupled to an actionFunction you should/must provide.

Do you have an action function in the controller? Does your code work?

  • I only want to trigger the refresh of the output panel. No save or updates, just surface the data stored Nov 27, 2014 at 16:05
  • No problem, but you still need to provide an action function and it would just return null. It goes like public PageReference DoNothing() { return null; }
    – RichardT
    Nov 27, 2014 at 16:09
  • Thanks Richard, I was trying to escape writing controller stuff. What I actually want to do is rerender a single row in my pageblocktable. But thats one for another day. Thanks again Nov 27, 2014 at 23:40

This works for checking rerender attribute of commandButton works with outputPanel or not :-

public class CustomController{
    public integer i;
    public CustomController() {i = 1;}
    public integer getI() {return i;}
    public void calculate() {i = i + 1;} 

VF page which uses above custom controller :-

<apex:page controller="CustomController">
  <apex:form >
    <apex:commandButton value="Increment" action="{!calculate}" rerender="Panel1"/>
    <apex:outputPanel id="Panel1">
      <apex:outputText value="{!i}"/>

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