wrapper class examples in salesforce

Wrapper Class

• The wrapper class is a class that contains the collection of objects or different objects to store the manipulated values.
• The wrapper class will have fields and different data types as Objects.

Apex Controller

public class wrapperClassController {

//Our collection of the class/wrapper objects cContact

public List<cContact> contactList {get; set;}

//This method uses a simple SOQL query to return a List of Contacts

public List<cContact> getContacts() {

if(contactList == null) {

contactList = new List<cContact>();

for(Contact c: [select Id, Name, Email, Phone from Contact ]) {

// As each contact is processed we create a new cContact object and add

                it to the contactList

contactList.add(new cContact(c));

}

}

return contactList;

}

public PageReference processSelected() {

//We create a new list of Contacts that we be populated only with Contacts

        if they are selected

List<Contact> selectedContacts = new List<Contact>();

//We will cycle through our list of cContacts and will check to see if the selected

        property is set to true, if it is we add the Contact to the selectedContacts list

for(cContact cCon: getContacts()) {

if(cCon.selected == true) {

selectedContacts.add(cCon.con);

}

}

// Now we have our list of selected contacts and can perform any type of logic we want,

         sending emails, updating a field on the Contact, etc

System.debug('These are the selected Contacts...');

for(Contact con: selectedContacts) {

system.debug(con);

}

contactList=null; // we need this line if we performed a write operation

         because getContacts gets a fresh list now

return null;

}

// This is our wrapper/container class. A container class is a class, a data structure,

     or an abstract data type whose instances are collections of other objects.

//In this example a wrapper class contains both the standard salesforce object Contact

    and a Boolean value

public class cContact {

public Contact con {get; set;}

public Boolean selected {get; set;}

//This is the contructor method. When we create a new cContact object we pass a

        Contact that is set to the con property. We also set the selected value to false

public cContact(Contact c) {

con = c;

selected = false;

}

}

}

Visualforce Page

<apex:page sidebar="false" controller="wrapperClassController">

<!--VF PAGE BLOCK-->

<apex:form >

<apex:pageBlock >

<apex:pageBlockButtons >

<apex:commandButton action="{!ProcessSelected}" value="Show Selected accounts" reRender="block2"/>

</apex:pageBlockButtons>

<apex:pageBlockSection columns="2">

<apex:pageBlockTable value="{!wrapaccountList}" var="waccl">

<apex:column >

<apex:facet name="header">

<apex:inputCheckbox />

</apex:facet>

<apex:inputCheckbox value="{!waccl.isSelected}" id="InputId"/>

</apex:column>

<apex:column value="{!waccl.accn.name}"/>

<apex:column value="{!waccl.accn.phone}"/>

<apex:column value="{!waccl.accn.billingcity}"/>

</apex:pageBlockTable>

<apex:pageBlockTable value="{!selectedAccounts}" var="sa" id="block2">

<apex:column value="{!sa.name}"/>

<apex:column value="{!sa.phone}"/>

<apex:column value="{!sa.billingcity}"/>

</apex:pageBlockTable>

</apex:pageBlockSection>

</apex:pageBlock>

</apex:form>

</apex:page>