The following events fire when a page loads:
Init() - Fires when the page is initializing.
LoadViewState() - Fires when the view state is loading.
LoadPostData() - Fires when the postback data is processing.
Load() - Fires when the page is loading.
PreRender() - Fires at the brief moment before the page is displayed to the user as HTML.
Unload() - Fires when the page is destroying the instances of server controls.