InitRaised after all controls have been initialized and any skin settings have been applied. Use this event to read or initialize control properties.InitCompleteRaised by the Page object. Use this event for processing tasks that require all initialization be complete.PreLoadUse this event if you need to perform processing on your page or control before the Load event.LoadThe 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.
LoadCompleteUse this event for tasks that require that all other controls on the page be loaded.
PreRenderThe 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.SaveStateCompleteUse this event perform tasks that require view state to be saved, but that do not make any changes to controls.RenderThis 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.UnloadThis 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.