Eventos en la pagina (asp.net)

AbortTransaction: Occurs when a user ends a transaction. (Inherited from TemplateControl.)
CommitTransaction: Occurs when a transaction completes. (Inherited from TemplateControl.)
DataBinding: Occurs when the server control binds to a data source. (Inherited from Control.)
Disposed: Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested. (Inherited from Control.)
Error: Occurs when an unhandled exception is thrown. (Inherited from TemplateControl.)
Init: Occurs when the server control is initialized, which is the first step in its lifecycle. (Inherited from Control.)
InitComplete: Occurs when page initialization is complete.
Load: Occurs when the server control is loaded into the Page object. (Inherited from Control.)
LoadComplete: Occurs at the end of the load stage of the page's life cycle.
PreInit: Occurs at the beginning of page initialization.
PreLoad: Occurs before the page Load event.
PreRender: Occurs after the Control object is loaded but prior to rendering. (Inherited from Control.)
PreRenderComplete: Occurs before the page content is rendered.
SaveStateComplete: Occurs after the page has completed saving all view state and control state information for the page and controls on the page.
Unload: Occurs when the server control is unloaded from memory. (Inherited from Control.)

referencia MSDN Microsoft