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>

Popular posts from this blog

How to clone a record using custom button in salesforce

Image
USE CASE  A user wants to create new records by mirroring the existing records with minimal clicks using the “Button” (Cloning the records). SOLUTION  Create the custom button where all the user-requested fields will be mapped. Add created a custom button on the page layout. Create a Custom Button  Go to Setup  - Object - Buttons, Links, and Actions Section -- Click New button or Link ->  Enter Label Name(Account Transfer) Select Display Type as “Detail Page Button” and Content Source as “ URL ” Add all the user-requested fields with their IDs and add the  return URL  with the Object id. If the field is Lookup, Prefix  CF  with field id (See the below Image) Finally  Save  all the works you did. 6.       Add created “ Custom Button ” on the Page Layout. 7.            When Clicking on the “ Account Transfer ” Button, Whatever the mapped fields in the button will...
Read more

How to extract information from xml using node.js

There are plenty of methods available to extract information from an XML file and I have used the XPath select method to fetch the tag values. The following modules have to install using the NPM install Method. var fs = require ( 'fs' ), xml2js = require ( 'xml2js' ); const parser = new xml2js . Parser (); const xpath = require ( 'xpath' ), dom = require ( 'xmldom' ). DOMParser ; sample XML file name as test.xml. < groceryShop > < ownerName > xxxx </ ownerName > < name > DepartmentalStore </> < address > bangalore </ address > < pincode > 562320 </ pincode > </ groceryShop > The above modules will drive the process to fetch the information. //To read the file by using the readFile method which may be sync or async function fs . readFile ( 'test.xml' , function ( err , data ){ if ( err ){ //display error } else { // d...
Read more

xml to json conversion

Use case      To convert the XML file to JSON file using node.js      Consider sample XML file name as test.xml which contains the following information < groceryShop > < ownerName > xxxx </ ownerName > < name > DepartmentalStore </> < address > bangalore </ address > < pincode > 562320 </ pincode > </ groceryShop >      There are different methods to convert XML to JSON .but here we will see customized JSON format where will see only required information details. we will create a JSON structure. output: var groceryitems = { ownerName : xxxx , name : DepartmentalStore , address : bangalore , pincode : 562301 }; // required modules: const fs = require ( 'fs' ), xml2js = require ( 'xml2js' ); //Step 1: To read file using fs.readfile syntax in node.js.it will fetch all the information      and store it into one variable var data...
Read more