How to use apex:selectOptions and prepare picklist values in Visualforce Page.

How to use apex:selectOptions and prepare picklist values in Visualforce Page.

How to use apex:selectOptions and prepare picklist values in Visualforce Page.

In this post i am using  <apex:selectOptions >,<apex:selectRadio>,<apex:selectList> tags. Here from controller i am preparing pick-list values and set in visualforce page.

Controller: 

public class SelectOptionController {
 public List<SelectOption> countrieLst {get;set;}
 public List<SelectOption> hobbiesLst {get;set;}
 public List<SelectOption> genderLst {get;set;}

 public String selectedCountry{get;set;}
 public String selectedHobby {get;set;}
 public String selectedGender {get;set;}
 public String selectedValues {get;set;}


 public SelectOptionController(){
  countrieLst = new List<SelectOption>();
  hobbiesLst = new List<SelectOption>();
  genderLst = new List<SelectOption>();
  
  countrieLst.add(new SelectOption('','--None--'));
  countrieLst.add(new SelectOption('India','India'));
  countrieLst.add(new SelectOption('China','China'));
  countrieLst.add(new SelectOption('US','US'));
  
  /* preparing picklist values in VF page.
  hobbiesLst.add(new SelectOption('','--None--'));
  hobbiesLst.add(new SelectOption('Swimming','Swimming'));
  hobbiesLst.add(new SelectOption('Reading','Reading'));
  hobbiesLst.add(new SelectOption('Cricket','Cricket'));
  */

  genderLst.add(new SelectOption('Male','Male'));
  genderLst.add(new SelectOption('Female','Female'));
   
 }

 public pageReference show(){
  selectedValues = 'Selected country:'+selectedCountry +'-->Selected Hobbies:'+selectedHobby+' Gender: -->'+selectedGender;
  return null;

 }


}


Visualforce page:

<apex:page controller="SelectOptionController">
 <apex:form > 
   <apex:commandbutton value="Show Values" action="{!show}"/>
   
   <apex:pageBlock >    
    <apex:outputLabel > Countries : </apex:outputLabel>
    <apex:selectList size="1" value="{!selectedCountry}">
      <apex:selectOptions value="{!countrieLst }"/>
    </apex:selectList> <br/>
    
    <apex:outputLabel > Gender : </apex:outputLabel>
    <apex:selectRadio value="{!selectedGender}"> 
     <apex:selectOptions value="{!genderLst}"/>
    </apex:selectRadio>  
    
     <apex:outputLabel > Hobbies :</apex:outputLabel>
    <apex:selectList size="1" value="{!selectedHobby}">
     <apex:selectOption itemLabel="--None--" itemvalue=""></apex:selectOption>
     <apex:selectOption itemLabel="Swimming" itemvalue="Swimming"></apex:selectOption>
     <apex:selectOption itemLabel="Reading" itemvalue="Reading"></apex:selectOption>
     <apex:selectOption itemLabel="Cricket" itemvalue="Cricket"></apex:selectOption>
    </apex:selectList>     
    </apex:pageBlock> 
   
   <apex:pageBlock title="selected values">
    <apex:outputText value="{!selectedValues}" style="color:red"/>   
   </apex:pageBlock>
 </apex:form>

</apex:page>


Test Class:

@isTest
Public class SelectOptionController_Test {
 static testmethod void testSelectOptionController(){
  //Test converage for the myPage visualforce page
  PageReference pageref = Page.SelectOptionVFExample;
  Test.setCurrentPageReference(pageref);
  
  // create an instance of the controller
  SelectOptionController sop= new SelectOptionController ();
  sop.selectedCountry ='India';
  sop.selectedHobby='Swimming';
  sop.selectedGender ='Male';
  sop.show();
  
  system.assertEquals('India',sop.selectedCountry);
  system.assertEquals('Swimming',sop.selectedHobby);
  system.assertEquals('Male',sop.selectedGender);
  }
}


out put: