Picklist remains blank after onchange

Hi,

I don't know what is wrong with my code.
If I change the selectedrtype, the page should run the onchange event to get the stagelist, but the stagelist remains blank.

Thanks,
Sascha

Public class depen002_class {

Public String SelectedRType {get; set;}

Public depen002_class() {

}

Public List <SelectOption> getRTypeList() {
    List <RecordType > RTypes = [SELECT Id, Name FROM RecordType WHERE sObjectType = 'Opportunity'];
    List <SelectOption> RTypeOptionList = new List <SelectOption>();
    FOR (RecordType R : RTypes) {
        RTypeOptionList.add (new SelectOption(R.Id, R.Name));
    }
    RETURN RTypeOptionList; 
}

Public List <SelectOption> getStageList() {
    
    List <SelectOption> StageOptionList = new List <SelectOption>();     
        
        IF (SelectedRType == '') {
            StageOptionList.add (new SelectOption('- None -', 'Stages empty'));
        } ELSE {
            StageOptionList.add (new SelectOption('- None -', 'You found a Stage'));
        } 
         
    RETURN NULL;               
    }
     
}

<apex:page controller="depen002_class">

<apex:form >

<table width="100%">
    <tr>
        <td align="center">
            <apex:selectList value="{!SelectedRType}" size="1" multiselect="false" style="width:150px">
             <apex:actionSupport event="onchange" action="{!getStageList}" />
                <apex:selectOptions value="{!RTypeList}" />             
            </apex:selectList>
        </td>        
    </tr>
</table>


<table width="100%">
    <tr>
        <td align="center">
            <apex:selectList size="1" multiselect="false" style="width:150px">
                <apex:selectOptions value="{!StageList}" />             
            </apex:selectList>
        </td>        
    </tr>
</table>

{!SelectedRType}

</apex:form>

</apex:page>

August 24, 2015
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Best Answer chosen by Sascha Deinert

Neetu_Bansal
Hi Sascha,

Use this page and controller class:
public class depen002_class { public String SelectedRType {get; set;} public List<SelectOption> StageOptionList { get; set; } public depen002_class() { } public List <SelectOption> getRTypeList() { List <RecordType > RTypes = [SELECT Id, Name FROM RecordType WHERE sObjectType = 'Opportunity']; List <SelectOption> RTypeOptionList = new List <SelectOption>(); for( RecordType R : RTypes ) { RTypeOptionList.add (new SelectOption(R.Id, R.Name)); } return RTypeOptionList; } public void createStageList() { StageOptionList = new List <SelectOption>(); IF(SelectedRType == '') { StageOptionList.add (new SelectOption('- None -', 'Stages empty')); } ELSE { StageOptionList.add (new SelectOption('- None -', 'You found a Stage')); } } }

<apex:page controller="depen002_class"> <apex:form > <table width="100%"> <tr> <td align="center"> <apex:selectList value="{!SelectedRType}" size="1" multiselect="false" style="width:150px"> <apex:actionSupport event="onchange" action="{!createStageList}" reRender="stageId"/> <apex:selectOptions value="{!RTypeList}" /> </apex:selectList> </td> </tr> </table> <apex:outputPanel id="stageId" > <table width="100%"> <tr> <td align="center"> <apex:selectList size="1" multiselect="false" style="width:150px"> <apex:selectOptions value="{!StageOptionList}" /> </apex:selectList> </td> </tr> </table> {!SelectedRType} </apex:outputPanel> </apex:form> </apex:page>
Let me know, if you need any other help.

Thanks,
Neetu

August 25, 2015
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Neetu_Bansal
Hi Sascha,

After you may any call to controller, you need to reRender the section, to reflect the changes. Use below code for your visualforce page:
<apex:page controller="depen002_class"> <apex:form > <table width="100%"> <tr> <td align="center"> <apex:selectList value="{!SelectedRType}" size="1" multiselect="false" style="width:150px"> <apex:actionSupport event="onchange" action="{!getStageList}" reRender="stageId"/> <apex:selectOptions value="{!RTypeList}" /> </apex:selectList> </td> </tr> </table> <apex:outputPanel id="stageId" > <table width="100%"> <tr> <td align="center"> <apex:selectList size="1" multiselect="false" style="width:150px"> <apex:selectOptions value="{!StageList}" /> </apex:selectList> </td> </tr> </table> {!SelectedRType} </apex:outputPanel> </apex:form> </apex:page>
Let me know, if you need any other help.

Thanks,
Neetu

August 24, 2015
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Sascha Deinert
Still not works.

But if I change return of the stagelist from RETURN NULL to RETURN STAGELIST then I get the information "you found a stage".
But if I change the recordtype I get an error: Return type of an Apex action method must be a PageReference. Found: core.apexpages.el.adapters.ApexListELAdapter.

Could you help me again.

Thanks,
Sascha

August 24, 2015
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This was selected as the best answer

Sain
Hi,

Refer below code it may be helop you.

<apex:page sidebar="false" controller="FieldDependencyClass">
<apex:form >
<apex:pageBlock >
<apex:pageBlockSection >
<apex:pageBlockSectionItem >
<apex:outputLabel value="Country"/>
</apex:pageBlockSectionItem>
<apex:pageBlockSectionItem >
<apex:SelectList value="{!Country}" size="1">
<apex:selectOptions value="{!countries}"/>
<apex:actionSupport event="onchange" rendered="B"/>
</apex:SelectList>
</apex:pageBlockSectionItem>

<apex:pageBlockSectionItem >
<apex:outputLabel value="State" />
</apex:pageBlockSectionItem>
<apex:pageBlockSectionItem >
<apex:selectList Value="{!State}" size="1" >
<apex:selectOptions value="{!states}" id="B"/>
<apex:actionSupport event="onchange" rendered="C"/>
</apex:selectList>
</apex:pageBlockSectionItem>

<apex:outputLabel value="City" />
<apex:selectList value="{!City}" size="1">
<apex:selectOptions value="{!Cities}" id="C"/>
</apex:selectList><br/><br/>
</apex:pageBlockSection>
</apex:pageBlock>
</apex:form>
</apex:page>
Controller:

public with sharing class FieldDependencyClass {

    Public String Country{get; set;}

    Public String States{get; set;}
    Public String Cities{get; set;}
    Public String Options{get; set;}
    //Public String StateOptions{get;set;}
    //Public String CityOptions{get;set;}


    public list<SelectOption> getCountries() {
    list<SelectOption> Options=new list<SelectOption>();
    Options.add(new SelectOption(' ','-None-'));
    Options.add(new SelectOption('IN','INDIA'));
    Options.add(new SelectOption('US','USA'));
        return Options;
    }

    public list<SelectOption> getStates() {
    list<SelectOption> Options=new list<SelectOption>();
    if(Country=='IN'||Country=='INDIA'){
    Options.add(new SelectOption('AP','Andhra Pradesh'));
    Options.add(new SelectOption('KN','Karnataka'));
    Options.add(new SelectOption('TN','TamilNadu'));
        }else
    If(Country=='US'){
    Options.add(new SelectOption('CA','California'));
    Options.add(new SelectOption('TS','Texas'));
    Options.add(new SelectOption('CO','Colorado'));
       }else
       {
       Options.add(new SelectOption(' ','-None-'));
       }
    return Options;
    }
    public list<SelectOption> getCities() {
    list<SelectOption> Options=new list<SelectOption>();
    If(State=='KN'){
    Options.add(new SelectOption('BNR','Bangalore'));
    Options.add(new SelectOption('MYS','Mysor'));
    }else
    If(State=='AP'){
    Options.add(new SelectOption('TPT','Tirupati'));
    Options.add(new SelectOption('VNG','Vizag'));
    }else
    If(State=='TN'){
    Options.add(new SelectOption('CH','Chennai'));
    Options.add(new SelectOption('TRI','Trivendom'));
    }else
    If(State=='CA'){
    Options.add(new SelectOption('LAS A','LAS Angeles'));
    Options.add(new SelectOption('SAN J','San Jose'));
    }else
    If(State=='TS'){
    Options.add(new SelectOption('AU','Austin'));
    Options.add(new SelectOption('HS','Houston'));
    }else
    If(State=='CO'){
    Options.add(new SelectOption('DEN','Denver'));
    Options.add(new SelectOption('BL','Boulder'));
    }else
    {
    Options.add(new SelectOption(' ','-None-'));
    }
        return Options;
    }
}

Regards,
Sain

August 25, 2015
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