【转载】Subscribe to an Event by Adding an Event Handle

You subscribe to a particular event in C# by defining an event handler-code that will be called whenever the event occurs (is raised). You then attach your event handler to an event on a specific object, using the += operator.

Below is an example where we define an event handler for the Dog.Barked event. Each time that kirby barks, we‘ll record the date and time of the bark in a list.

 1 private static List<DateTime> barkLog = new List<DateTime>();
 2 
 3 static void Main()
 4 {
 5     Dog kirby = new Dog("Kirby", 12);
 6     kirby.Barked += new EventHandler(kirby_Barked);
 7 
 8     kirby.Bark();
 9     Console.ReadLine();
10 
11     kirby.Bark();
12     Console.ReadLine();
13 }
14 
15 // Neither argument is used, for the moment
16 static void kirby_Barked(object sender, EventArgs e)
17 {
18     // Log kirby‘s barks
19     barkLog.Add(DateTime.Now);
20 }

Assuming that the Dog class fires its Barked event whenever we call the Bark method, our handler will get called whenever kirby barks.

【转载】Subscribe to an Event by Adding an Event Handle,布布扣,bubuko.com

【转载】Subscribe to an Event by Adding an Event Handle

原文：http://www.cnblogs.com/yuthreestone/p/3595598.html