CODEWITHSUNDEEP
c#.netevents
Spoike
Spoike

Reputation: 121762

How do I write events and eventhandlers in C#?

I've been trying a good way to memorize how to write events and eventhandlers in C# for a while. Whenever I want to refer to a tutorial on the Internet they tend to be verbose.

The question is how do I write events and eventhandlers in C#? Have you got a code example that illustrates easily how to write such?

Upvotes: 6

Views: 8301

Answers (2)

coHobo
coHobo

Reputation: 21

Once you get an appetite, try this out:

For VS2005: How to: Publish Events that Conform to .NET Framework Guidelines (C# Programming Guide) http://msdn.microsoft.com/en-us/library/w369ty8x(v=vs.80).aspx

For Visual Studio 11: http://msdn.microsoft.com/en-us/library/w369ty8x(v=vs.110).aspx

Upvotes: 1

Marc Gravell
Marc Gravell

Reputation: 1062620

They don't have to be verbose:

// declare an event:
public event EventHandler MyEvent;

// raise an event:
var handler = MyEvent;
if(handler != null) handler(this, EventArgs.Empty);

// consume an event with an anon-method:
obj.MyEvent += delegate { Console.WriteLine("something happened"); };

// consume an event with a named method:
obj.MyEvent += SomeHandler;

void SomeHandler(object sender, EventArgs args) {
    Console.WriteLine("something happened");
}

What is the bit that is being troublesome?

Upvotes: 13

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