剛寫了段程序，總算稍微理解了下委托，留下備忘。

定義：

1?public?delegate?string?DelegateTest(string?sss);

類中實例化委托：

?1?public?class?TestClass
?2?????{
?3?????????public?event?DelegateTest?_delegateTest;
?4?
?5?????????public?string?BeginDelegate()
?6?????????{
?7?????????????if?(_delegateTest?!=?null)
?8?????????????????return?_delegateTest("ssssssss");
?9?????????????else
10?????????????????return?"1331";
11?????????}
12?????}

調用的時候，直接調用TestClass中的BeginDelegate方法，

為實例化的委托添加方法

?1?public?class?ObjClass
?2?????{
?3?????????public?ObjClass(TestClass?tc)
?4?????????{
?5?????????????tc._delegateTest?+=?new?DelegateTest(typeBj);
?6?????????}
?7?
?8?????????public?string?typeBj(string?sssss)
?9?????????{
10?????????????Console.WriteLine(sssss);
11?
12?????????????return?sssss?+?"123132132";
13?????????}
14?????}
15?
16?????public?class?ObjClass1
17?????{
18?????????public?ObjClass1(TestClass?tc)
19?????????{
20?????????????tc._delegateTest?+=?new?DelegateTest(typeJJ);
21?????????}
22?
23?????????public?string?typeJJ(string?sssssss)
24?????????{
25?????????????Console.WriteLine(sssssss?+?"123123132");
26?
27?????????????return?sssssss?+?"abcdefghijklmn";
28?????????}
29?????}

主方法：

?1?public?class?MainClass
?2?????{
?3?????????public?static?void?Main()
?4?????????{
?5?????????????TestClass?tc?=?new?TestClass();
?6?
?7?????????????ObjClass?oc?=?new?ObjClass(tc);
?8?????????????ObjClass1?oc1?=?new?ObjClass1(tc);
?9?????????????string?s?=?tc.BeginDelegate();
10?
11?????????????Console.ReadKey();
12?????????}
13?????}

主方法里調用tc.BeginDelegate();

清除委托中的方法

1?tc._delegateTest?-=?new?DelegateTest(oc1.typeJJ);

?

?

public?delegate?string?DelegateTest(string?sss);

????public?class?TestClass
????{
????????public?event?DelegateTest?_delegateTest;

????????public?string?BeginDelegate()
????????{
????????????if?(_delegateTest?!=?null)
????????????????return?_delegateTest("ssssssss");
????????????else
????????????????return?"1331";
????????}
????}


????public?class?ObjClass
????{
????????public?ObjClass(TestClass?tc)
????????{
????????????tc._delegateTest?+=?new?DelegateTest(typeBj);
????????}

????????public?string?typeBj(string?sssss)
????????{
????????????Console.WriteLine(sssss);

????????????return?sssss?+?"123132132";
????????}
????}

????public?class?ObjClass1
????{
????????public?ObjClass1(TestClass?tc)
????????{
????????????tc._delegateTest?+=?new?DelegateTest(typeJJ);
????????}

????????public?string?typeJJ(string?sssssss)
????????{
????????????Console.WriteLine(sssssss?+?"123123132");

????????????return?sssssss?+?"abcdefghijklmn";
????????}
????}

????public?class?MainClass
????{
????????public?static?void?Main()
????????{
????????????TestClass?tc?=?new?TestClass();

????????????ObjClass?oc?=?new?ObjClass(tc);
????????????ObjClass1?oc1?=?new?ObjClass1(tc);

????????????tc._delegateTest?-=?new?DelegateTest(oc1.typeJJ);
????????????string?s?=?tc.BeginDelegate();

????????????Console.ReadKey();
????????}
????}

?

?

轉載于:https://www.cnblogs.com/treeyh/archive/2007/08/09/849486.html

總結

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