Controller Extensions Part 1

What Is Controller Extension In Visualforce?

Extensions are apex classes used to provide addition functionalities to vf page other than controller.

Code Example Of Controller Extension

Here is the below example code for a standard controller extension class

public class SampleExtension {
    private ApexPages.StandardController stdController;
    public SampleExtension(ApexPages.StandardController controller) {
        stdController = controller;
    }
    
    public String getAccountName() {
        // Accessing the standard controller's record
        Account acc = (Account)stdController.getRecord();
        return acc.Name;
    }
}

Here is the below example code for a vf page having a standard controller and extension

public class SampleExtension {
    private ApexPages.StandardController stdController;
    
    public SampleExtension(ApexPages.StandardController controller) {
        stdController = controller;
    }
    
    public String getAccountName() {
        // Accessing the standard controller's record
        Account acc = (Account)stdController.getRecord();
        return acc.Name;
    }
}

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