ASP.NET Page lifecycle

Question posted in Computer Software on 10 2009
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Please state the page events as they accour when the page is acccessed for the first time.
explain each state in few words.
state the events in their order.
state as many events as you can.
 
 
1 Answer
 
The following lists the page life-cycle events that you will use most frequently. There are more events than those listed; however, they are not used for most page processing scenarios.

PreInit


  • Check the IsPostBack property to determine whether this is the first time the page is being processed.
  • Create or re-create dynamic controls.
  • Set a master page dynamically.
  • Set the Theme property dynamically.
  • Read or set profile property values.

Init
Raised after all controls have been initialized and any skin settings have been applied. Use this event to read or initialize control properties.

InitComplete
Raised by the Page object. Use this event for processing tasks that require all initialization be complete.

PreLoad
Use this event if you need to perform processing on your page or control before the Load event.

Load
The Page calls the OnLoad event method on the Page. then recursively does the same for each child control, which does the same for each of its child controls until the page and all controls are loaded.


Use the OnLoad event method to set properties in controls and establish database connections.


LoadComplete
Use this event for tasks that require that all other controls on the page be loaded.


PreRender
The PreRender event occurs for each control on the page. Use the event to make final changes to the contents of the page or its controls.

SaveStateComplete
Use this event perform tasks that require view state to be saved, but that do not make any changes to controls.

Render
This is not an event; instead, at this stage of processing, the Page object calls this method on each control. All ASP.NET Web server controls have a Render method that writes out the control's markup that is sent to the browser.

Unload
This event occurs for each control and then for the page. In controls, use this event to do final cleanup for specific controls, such as closing control-specific database connections.


For the page itself, use this event to do final cleanup work, such as closing open files and database connections, or finishing up logging or other request-specific tasks.




 


10/01/2009
 
 
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