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ErikTheTinkererErikTheTinkerer 

How to create a custom set of dependant picklists, with more than 250 values

Hello braintrust,

 

I have a requirement to create a set of dependant picklists, but I want the controlling field to have multiselect piclist behavior...

Also, my 2nd picklist may have more than 250 values.

 

So I assume I have to somehow create this programmatically.

 

Can visualforce and apex do this?

Or do I have to resort to AJAX?

 

Thanks!

 

Erik

ErikTheTinkererErikTheTinkerer

Found the info:

 

You can create custom picklists using Visualforce and Apex, by creating an Visualforce Controller Extension. SeeChapter 12, page 371, of the Developer Guide, for a detailed example of a picklist, populated with values via Apex.

 

I believe this could even allow you to extend your # of picklist values beyond the default of 250 items (though i haven't tried it.)

 
ErikTheTinkererErikTheTinkerer

A bit more

 

 

VF has a tag called <apex:selectList> to create picklists that are driven by Apex code. In your case, you might use Apex code to query a custom object with the picklist values. You could hardcode the values in Apex but with 250 values, table driven seems to be a better approach...

 

 

 

 

Example:

 

<!-- Page: -->

<apex:page controller="sampleCon">

<apex:form>

<apex:selectList value="{!countries}" multiselect="true">

<apex:selectOptions value="{!items}"/>

</apex:selectList><p/>

<apex:commandButton value="Test" action="{!test}" rerender="out" status="status"/>

</apex:form>

<apex:outputPanel id="out">


<apex:actionstatus id="status" startText="testing...">

<apex:facet name="stop">

<apex:outputPanel>

<p>You have selected:</p>

<apex:dataList value="{!countries}" var="c">{!c}</apex:dataList>

</apex:outputPanel>

</apex:facet>

</apex:actionstatus>

</apex:outputPanel>

</apex:page>

/*** Controller: ***/

public class sampleCon {

String[] countries = new String[]{};

public PageReference test() {

return null;

}

public List<SelectOption> getItems() {

List<SelectOption> options = new List<SelectOption>();

options.add(new SelectOption('US','US'));

options.add(new SelectOption('CANADA','Canada'));

options.add(new SelectOption('MEXICO','Mexico'));

return options;

}



public String[] getCountries() {

return countries;

}



public void setCountries(String[] countries) {

this.countries = countries;

}

}