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Gopinath418
difference between Listcontroller and Setcontroller in apex
What is the difference between StandardListController and StandardSetController and when could we use listcontroller and when to use Setcontroller?
A Visualforce controller is a set of instructions that specify what happens when a user interacts with the components specified in associated Visualforce markup, such as when a user clicks a button or link. Controllers also provide access to the data that should be displayed in a page, and can modify component behavior.
You can find more information here, but basically a StandardController is for ONE record, i.e. if you'd like to create a new Visualforce page for a single record, you'd use a Standard Controller in your Apex.
StandardSetController
Standard list controllers allow you to create Visualforce pages that can display or act on a set of records. Examples of existing Salesforce pages that work with a set of records include list pages, related lists, and mass action pages.
You can find more information here, but basically Set (list) controllers are for MULTIPLE (or a list of) records, i.e. if you'd like to create a new Visualforce page for a List of records (or even from a selection of records on a List view), you'd use a Standard Set Controller in your Apex.
Standard List Controller is a logical term that is used when defining a visualforce page for any objects List Controller, using recordSetVar on <apex:page> in conjunction with StandardController. StandardSetController is an Object that refers to these list controllers in Apex Class.
https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/apex_pages_standardsetcontroller.htm
https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_controller_sosc_about.htm
If same why do we have two same controllers?
Thanks,
Gopinath