In a lot of cases, you need to return some custom data from your events. Inheriting from ‘EventArgs’ gives you the opportunity to do this. Here’s an example of how you do it. Fortunately this time, it’s all self explanatory.
1: // Author Mike Lovell (mike.lovell@gotinker.com)
2:
3: class Firey
4: {
5: public class MyEventArgs : EventArgs
6: {
7: public bool IsSomethingNice;
8: public int SomeNumber;
9: public string SomeText;
10: }
11:
12:
13: public event EventHandler<MyEventArgs> MyEvent;
14:
15:
16: public void FireEvent()
17: {
18: if (MyEvent != null) MyEvent(this, new MyEventArgs()
19: {
20: IsSomethingNice = true,
21: SomeNumber = 666,
22: SomeText = "Hello World"
23: });
24: }
25: }
26:
27:
28:
29: class Program
30: {
31: static void Main(string[] pargs)
32: {
33: var firey = new Firey();
34:
35: firey.MyEvent += delegate(object sender, Firey.MyEventArgs args)
36: {
37: Console.WriteLine
38: (
39: "Event Fired:nIsSomethingNice: {0}nSomeNumber: {1}nSomeText: {2}",
40: args.IsSomethingNice,
41: args.SomeNumber,
42: args.SomeText
43: );
44: };
45:
46: firey.FireEvent();
47:
48: Console.ReadLine();
49: }
50: }