Making and using events.

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Introduction

1 - class InfoSupplier Exposes its own event which carries some information. For example a Information agency which receives information from its agents and then exposes this information to the TV, news and so on.

// This is the delegate ( in fact it defines signature of the function )
public	delegate void InfoEventHandler(object source, InfoEventArgs args);

// This is an event, it is a data member of the type of the delegate.
public	event	InfoEventHandler	OnInfoArrivedHandler;

2 - class InfoListener Uses the events which are raised from the InfoSupplier instances. When receives a new event it displays the information which the event has brought. This class has one more special method : void PublishInfo(object source, InfoEventArgs info); which must have the same signature as the delegate declared in the class InfoSupplier.

3 - class InfoEventArgs : EventArgs This is the actual event which is raised and received. It contains one data member, which describes an event. U can put here as much data members as u want, in order to fully describe your event.

This is the idea of using events and it’s the same in Timer events and so on…easy.

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