What is the difference between a delegate type and eventhandler type?

Question

Three related idioms: event, delegate, event-handler. I always get confused by who is \"added\" to who.

event += handler
event += delegate
handler += delegate
         


        

Answer 1

The event has a delegate added to it which "points" to a handler.

So basically, when the event is raised, the collection of delegates it has, will be invoked, which as result will invoke handlers connected to those delegates.

//declare delegate
public delegate void EventHandler(  Object sender,  EventArgs e)

//create event based on delegate
public event EventHandler evHandler;

//function to attach to handler
public static void Handler(object sender, EventArgs e) {}

attach eventhandler function through delegate to event.
event += new EventHandler(Handler);