{"id":7779,"date":"2021-08-28T14:50:21","date_gmt":"2021-08-28T14:50:21","guid":{"rendered":"https:\/\/www.gologica.com\/elearning\/?p=7779"},"modified":"2025-04-08T16:34:36","modified_gmt":"2025-04-08T16:34:36","slug":"controller-extension-in-salesforce","status":"publish","type":"post","link":"https:\/\/www.gologica.com\/elearning\/controller-extension-in-salesforce\/","title":{"rendered":"Controller Extension in Salesforce"},"content":{"rendered":"

Introduction:<\/strong><\/p>\n

In Salesforce<\/strong><\/a>, controller extension is called the Apex class containing a constructor, which is used to extend or add the functionalities of a customer controller or standard controller in Salesforce. Also, the extension controller is used in leveraging the functionality of another controller by using custom logic. In Salesforce, controller extensions are used without the custom controller or standard controller.<\/p>\n

Controller extension in Salesforce:<\/strong><\/p>\n

In this article, we will learn about Controller Extension in Salesforce and also how to build it. With a simple example, let’s learn about controller extension. This article helps you to learn about building a Salesforce extension controller with Apex class. Apex class containing is a controller extension with a constructor that has a single argument of<\/p>\n

\"SALESFORCE<\/a><\/figure>\n

type ApexPages.CustomControllerName or StandardController.<\/p>\n

Here, the ExtensionController is known as the name of a custom controller.<\/p>\n

public class ExtensionController {<\/p>\n

\u00a0\u00a0\u00a0 private final Account acct;<\/p>\n

\u00a0\u00a0\u00a0 public ExtensionController {<\/p>\n

(ApexPages.StandardController stdController) {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 this.acct = (Account)stdController.getRecord();<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 public String getGreeting() {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return ‘Hello ‘ + acct.name + ‘ (‘ + acct.id + ‘)’;<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

}<\/p>\n

Expression references the method of greeting in the extension controller.<\/p>\n

In Salesforce, after creating an Apex class, the Controller extension, we have to implement the Controller extension by using the virtual force pages. Now, let us create the visual force which is given below.<\/p>\n

In the given example, the user has named the Visualforce page as an extension controller. Here, the extension controller is added to the page of visual force by using the extension attribute in the component <apex:page>. Both the extension and controller attributes should be used in the component of <apex:page>.<\/p>\n

<apex:page standardController=”Account” extensions=”ExtensionController”><\/p>\n

\u00a0\u00a0\u00a0 {!greeting} <p\/><\/p>\n

\u00a0\u00a0\u00a0 <apex:form ><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <apex:inputField value=”{!account.name}”\/> <p\/><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <apex:commandButton value=”Save” action=”{!save}”\/><\/p>\n

\u00a0\u00a0\u00a0 <\/apex:form><\/p>\n

<\/apex:page><\/p>\n

Every method in the controller extension is referred to with a notation {!} in the markup of visual force.<\/p>\n

<apex:commandButton> tag saves the method along with the attribute of action.<\/p>\n

<apex:inputField> tag the account name by using the standard controller.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0Related Tech courses: <\/strong>Salesforce Integration Training<\/strong><\/a><\/p>\n

How can extensions help the user establish advanced Visualforce Pages?<\/strong><\/p>\n

As discussed in the above paragraphs, extensions have many benefits; they can have custom controllers. In the extension, we have one custom controller and may have several classes. Also, there are various scenarios in which the user can make use of the extension.<\/p>\n

Step by step explanation of the code:<\/p>\n

Section 1: Example of Custom Controller:<\/strong><\/p>\n