Salesforce Picklist example Visualforce page

Picklist Examples

Example 1: Getting all names of an account in to a Picklist

page:

<apex:page sidebar="false" controller="accPickNamesDisplayClass">
	<apex:form >
		<apex:selectList multiselect="false" size="1">
			<apex:selectOptions value="{!accNames}">
			</apex:selectOptions>
		</apex:selectList>
	</apex:form>
</apex:page>

class:

public with sharing class accPickNamesDisplayClass {
	List<selectOption> options = new List<selectOption>();
	public List<selectOption> getAccNames() {
		for(DataLoadTest__c acc : [select Id,name from DataLoadTest__c]) {
			options.add(new selectOption(acc.name,acc.name));
		}
		return options;
	}
}

Example 2: Dependent Picklist Preparation using Controller:

In this scenario we can see how to generate a picklist dynamically and preparation of dependant picklists.

Here dependant picklist is will be populated using apex:actionsupport.

page:

<apex:page sidebar="false" controller="DependentClassabcd">
	<apex:form >
		Departments: <apex:selectList value="{!selDept}" multiselect="false" size="1">
		<apex:actionSupport event="onchange" reRender="out"/>
			<apex:selectOptions value="{!deptnames}">
			</apex:selectOptions>
		</apex:selectList> <br/>
		Employees: <apex:selectList multiselect="false" id="out" size="1">
			<apex:selectOptions value="{!empnames}">
			</apex:selectOptions>
		</apex:selectList>
	</apex:form>
</apex:page>

class:

public with sharing class DependentClassabcd {
	public String selDept {
		get;
		set;
	}
	List<selectOption> empOptions = new List<selectOption>();
	public List<selectOption> getEmpnames() {
		empOptions.clear();
		empOptions.add(new selectOption('--None--','--None--'));
		for(Employee__c objEmp : [select Id,name,department__c from Employee__c where department__r.name=:selDept]){
			empOptions.add(new selectOption(objEmp.name,objEmp.name));
		}
		return empOptions;
	}
	List<selectOption> deptOptions = new List<selectOption>();
	public List<selectOption> getDeptnames() {
		deptOptions.add(new selectOption('--None--','--None--'));
		for(Department__c objDept : [select name from Department__c]){
			deptOptions.add(new selectOption(objDept.name,objDept.name));
		}
		return deptOptions;
	}
}