Assembly: System.Web (in System.Web.dll)
The SelectedNodeChanged event is raised when a node is selected in the TreeView control. This allows you to provide an event-handling method that performs a custom routine, such as updating the displayed content, whenever this event occurs.
You can optionally set the SelectAction property of a node to specify which event is raised when that node is selected.
Raising an event invokes the event handler through a delegate. For more information, see Consuming Events.
The 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.Notes to Inheritors
When overriding the method in a derived class, be sure to call the method for the base class so that registered delegates receive the event.