Page Life Cycle tagged posts

ASP.NET Page Life Cycle with Example

Category: ASP.NET Comments: One comment

PreInit : The entry point of the page life cycle is the pre-initialization phase called “PreInit”. You can dynamically set the values of master pages and themes in this event. You can also dynamically create controls in this event. Init : This event fires after each control has been initialized, each control's UniqueID is set and any skin settings have been applied. You can use this event to change initialization values for controls. The “Init” event is fired first for the most bottom control in the hierarchy, and then fired up the hierarchy until it is fired for the page itself. InitComplete: Raised once all initializations of the page and its controls have been completed. Till now the viewstate values are not yet loaded, hence you can use this event to make changes to view state that you want to make sure are persisted after the next postback PreLoad : Raised after the page loads view state for itself and all controls, and after it processes postback data that is included with the Request instance (1)Loads ViewState : ViewState data are loaded to controls (2)Loads Postback data : postback data are now handed to the page Load: The important thing to note about this event is the fact that by now, the page has been restored to its previous state in case of postbacks. Code inside the page load event typically checks for PostBack and then sets control properties appropriately. This method is typically used for most code, since this is the first place in the page lifecycle that all values are restored. Most code checks the value of IsPostBack to avoid unnecessarily resetting state. You may also wish to call Validate and check the value of IsValid in this method. You can also create dynamic controls in this method.Read More