Page Life Cycle

The life cycle of Active Server Page involves various stages from requesting the page to unloading the page. This blog explains the different stages of ASP.NET page life cycle.

Stages of Page Life Cycle:
Page Request

Start
Initialization
Load
Validation
Event
Render
Unload

Page Request Stage:

In this stage, the client gives request to server for accessing a web page. This occurs before the page life cycle begins...

Start

The essential properties of the web page like request, respond attributes are set during this stage. It also takes care of initializing post back property that determines the type of request.

Initialization

Control objects such as buttons, text boxes, drop down lists and other components of the web page are initialized during this stage. Unique ID is also set for the components for identification.

Load

If the request for loading web page is approved and the components are initialized, then the page is loaded to the view state.

Validation

Controls required for validating and approving the accessibility of the web page content is loaded during this stage.

Event

        Various events like clicking buttons, checking check boxes, selecting radio buttons are occurred during this stage.

Render

        After the event occurs, the appropriate event handler will render the service assigned for that particular event in this stage.

Unload

        When the web page service has been successfully completed, then it is ready to be discarded by the server.

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