ASP.NET Page Life Cycle

Page Pre Initializing	Page_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.
Page Initialization	Page_Init	Raised after all controls have been initialized. Use this event to read or initialize control properties.
Page Initialization Completed	Page_InitComplete	Use this event for processing tasks that require all initialization be complete.
View State Loading	LoadViewState	The view state of the control posted by the client is reloaded into the new instance of the control.
Page before Load	OnPreLoad	Use this event if you need to perform processing on your page or control before the Load event.
Page Loading	OnLoad	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.
Page Load	Page_Load	This is not an event instead, at this stage of processing, the OnLoad event calls the Page_Load method.
Loading the postback data	LoadPostData	The server searches any data corresponding to the control that is loaded in the data posted by the client.
PostBack Event Handling	RaisePostBackEvent	Notifies the server control that caused the postback that it should handle an incoming postback event.
Control Event
Page Load Completed	LoadComplete	Use this event for tasks that require that all other controls on the page be loaded.
PreRendering	Page_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.
PreRendering Completed	OnPreRenderComplete	The OnPreRenderComplete method is called when the prerendering stage of the page life cycle is complete. At this stage of the page life cycle, all controls are created and the page is ready to render the output.
Saving ViewState	SaveViewState	Before this event occurs, ViewState has been saved for the page and for all controls. Any changes to the page or controls at this point will be ignored. Use this event perform tasks that require view state to be saved, but that do not make any changes to controls.
Saving ViewState Completed	OnSaveStateComplete	The OnSaveStateComplete method is called when the state information for the control has been written to the persistence medium for the page.
Creating HTML	CreateHtmlTextWriter	The CreateHtmlTextWriter method creates a TextWriter through the browser property of the request object associated with the page request.
Rendering	Page_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.
Page Unload	OnUnload	Fires immediately before the object is unloaded from the servers memory.
Unloading	Page_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.

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