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Events and Delegates in Remoting Applications
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By Nishant Kumar
Events are one of the members of the class. When any noteworthy
activity occurs in the application, an event is raised which sends out the
message to the other part of the application which handles the event. The event
can carry arguments that contain information about the event. The method which
handles the event must have the same signature as the event itself. Events are
commonly used in the applications with graphical user interface elements such
as buttons, textbox etc. An event is triggered when any action such as mouse
click occurred in the interface element. The event-based programming model can
be used in the non-GUI applications such as .NET Remoting application. An event
in remoting.net occurs when the state of the application changes.
A delegate acts like a strongly type function pointer.
Delegates can invoke the methods that they reference without making explicit
calls to those methods. It is type safe since it holds reference of only
those methods that match its signature. Unlike other classes, the delegate
class has a signature. Delegates are used to implement event programming model
in .NET application. Delegates enable the methods that listen for an event, to
be abstract.
Steps to implement delegate to listen for events in the remoting application
Define a delegate that wraps an event handler method to handle the event.
Implement a class that raises the event.
Implement class that handles the event.
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