Assembly: System.Web (in System.Web.dll)
When notified by the method, Web server controls must perform any initialization steps that are required to create and set up an instance. In this stage of the server control's life cycle, the control's view state has yet to be populated. Additionally, you cannot access other server controls when this method is called, regardless of whether it is a child or parent to this control. Other server controls are not guaranteed to be created and ready for access.
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnInit method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
The method is used primarily by control developers extending the functionality of the HtmlForm control.Notes to Inheritors
When overriding the method in a derived class, be sure to call the base class's method so that registered delegates receive the event. Additionally, calling the base class's method ensures that the HtmlForm control is properly set as the Web page form and the page's view state is persisted.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.