I have defined a SelectList under pageBlockButtons. The problem is top part of SelectList is getting rendered properly [selecting Temporary from list opens another Selectlist as expected], but bottom part is not working.

To replicate the issue:

Try it in your Org; you would find a SelectList next to Test1 button (both on top part and lower part -- Pls see the screen shot).

Lets test Using TOP part (Pls see the screen shot): Select Temporary from the drop down box, immediately a new DropDown shows next to it. -- This is fine.

Test Using Lower part (Pls see the screen shot): Select Temporary from the drop down box, in this time new DropDown does not show. -- This is NOT fine.

VF Page

<apex:page controller="Cntl_SelectListTest1">
    <apex:form id="frm">
        <apex:pageBlock id="pb2">
            <apex:pageBlockButtons location="both">                                
              <apex:commandButton value="Test1"/>
              <apex:selectList id="selected_list" value="{!dropdown1}" required="false" size="1">
                        <apex:selectOption itemvalue="1" itemLabel="Permanent"/>
                        <apex:selectOption itemvalue="2" itemLabel="Temporary"/>
                        <apex:actionSupport event="onchange" reRender="frm" action="{!change}"/>
              <apex:selectList id="dropdown2" required="false" value="{!dropdown2}" size="1" rendered="{!IF(options != null && options.size > 0, true, false)}">                
                        <apex:selectOptions value="{!options}" />
                        <apex:actionSupport event="onchange" reRender="frm" />


public class Cntl_SelectListTest1 {
    public String dropdown1{get; set;}
    public String dropdown2{get; set;}
    public List<SelectOption> options{get; set;}

    public void  change() {        
        if(dropdown1 == '1') {                    
            options = new List<SelectOption>();
        } else if(dropdown1 == '2') {                    
            options = new List<SelectOption>();
            options.add(new SelectOption('1','1 Month'));
            options.add(new SelectOption('3','3 Months'));
            options.add(new SelectOption('6','6 Months'));   
            options.add(new SelectOption('12','1 Year'));


enter image description here

Please help...

enter image description here

| improve this question | | | | |
  • What is not working here? – Tushar Sharma Dec 1 '16 at 11:17
  • @TusharSharma: The lower selectList. If I select lower selectList, it does not work. – Kamruzzaman Dec 1 '16 at 11:51
  • When you are saying lower this means dropdown2. Also I don't find any action which you are performing. You are just printing a debug. So the method does not get called? – Tushar Sharma Dec 1 '16 at 11:53
  • No! Lower means the highlighted section + Test1 button. And top parts mean, the Test1 button + selectLists (not highlighted in the snap). – Kamruzzaman Dec 1 '16 at 11:57
  • @TusharSharma: If you copy-paste the code in your org and try out the same, you would find the top part is working absolutely fine. And, I want the lower part to work similarly.. – Kamruzzaman Dec 1 '16 at 11:58

I found a few posts in Salesforce developer's forum about this issue: https://developer.salesforce.com/forums/?id=906F000000098qWIAQ and https://developer.salesforce.com/forums/?id=906F000000097vZIAQ

I couldn't find any explication of why it happens at a quick look, but apparently the most common solution to achieve the desired behavior is to split the pageBlockButtons in two. Instead of:

<apex:pageBlockButtons location="both"> 

You would have one pageBlockButtons section with location="top" and another one with location="bottom". There are some examples in the links I posted if you need some extra help.

| improve this answer | | | | |
  • Thanks @Mauricio I followed this approach only (split the pageBlockButtons in two). I checked the links, but unfortunately it's not applicable to my case. – Kamruzzaman Dec 1 '16 at 15:46
  • @Robi - If it is not applicable in your case why did you accept the answer. – Eric Dec 2 '16 at 8:54
  • @Eric: The links are not applicable to my issue. Otherwise; the suggestion provided by Mauricio was correct. – Kamruzzaman Dec 2 '16 at 8:57
  • @Eric: But, if anyone provides more specific answer (with VF page + controller), I shall accept that... – Kamruzzaman Dec 2 '16 at 9:04

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