The ASP.NET page life cycle is the sequence of events that occur when a web page is requested and processed by a server. It is a series of steps that the server goes through to generate the HTML for the page.
The ASP.NET page life cycle consists of the following stages:
1. Page Request: When a user requests a page, the server receives the request and begins to process it.
2. Start: The server begins to instantiate the page and its controls.
3. Page Initialization: The server initializes the page and its controls, setting their properties and other attributes.
4. Load: The server loads the page’s data and view state information.
5. Postback Event Handling: If the page is a postback, the server processes any events that were triggered by the user’s actions.
6. Rendering: The server renders the page and its controls, generating the HTML for the page.
7. Unload: The server unloads the page and its controls, freeing up any resources they were using.
Example:
User requests a page from the server
Server receives the request and begins to process it
Server instantiates the page and its controls
Server initializes the page and its controls, setting their properties and other attributes
Server loads the page’s data and view state information
If the page is a postback, the server processes any events that were triggered by the user’s actions
Server renders the page and its controls, generating the HTML for the page
Server unloads the page and its controls, freeing up any resources they were using