c#学习笔记2-委托

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154

using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;     namespace Demo {     class Demo9     {         //static void Main(string[] args)         //{                       //    A a = new A();         //    B b = new B(a);         //    C c = new C(a);         //    a.Fall();         //    Console.ReadLine();                     //}     }       /// <summary>     /// 首领A举杯委托     /// </summary>     /// <param name="hand">手：左、右</param>     public delegate void RaiseEventHandler(string hand);     /// <summary>     /// 首领A摔杯委托     /// </summary>     public delegate void FallEventHandler();     /// <summary>     /// 首领A     /// </summary>     public class A     {         /// <summary>         /// 首领A举杯事件         /// </summary>         public event RaiseEventHandler RaiseEvent;         /// <summary>         /// 首领A摔杯事件         /// </summary>         public event FallEventHandler FallEvent;           /// <summary>         /// 举杯         /// </summary>         /// <param name="hand">手：左、右</param>         public void Raise(string hand)         {             Console.WriteLine("A{0} is ready", hand);             // 调用举杯事件，传入左或右手作为参数             if (RaiseEvent != null)             {                 RaiseEvent(hand);             }         }         /// <summary>         /// 摔杯         /// </summary>         public void Fall()         {             Console.WriteLine("A is goods");             // 调用摔杯事件             if (FallEvent != null)             {                 FallEvent();             }         }     }     /// <summary>     /// 部下B     /// </summary>     public class B     {         A a;           public B(A a)         {             this.a = a;             a.RaiseEvent += new RaiseEventHandler(a_RaiseEvent); // 订阅举杯事件             a.FallEvent += new FallEventHandler(a_FallEvent); // 订阅摔杯事件         }         /// <summary>         /// 首领举杯时的动作         /// </summary>         /// <param name="hand">若首领A左手举杯，则B攻击</param>         void a_RaiseEvent(string hand)         {             if (hand.Equals("left"))             {                 Attack();             }         }           /// <summary>         /// 首领摔杯时的动作         /// </summary>         void a_FallEvent()         {             Attack();         }           /// <summary>         /// 攻击         /// </summary>         public void Attack()         {             Console.WriteLine("b attack");         }     }     /// <summary>     /// 部下C     /// </summary>     public class C     {         A a;         public C(A a)         {             this.a = a;             a.RaiseEvent += new RaiseEventHandler(a_RaiseEvent); // 订阅举杯事件             a.FallEvent += new FallEventHandler(a_FallEvent); // 订阅摔杯事件         }         /// <summary>         /// 首领举杯时的动作         /// </summary>         /// <param name="hand">若首领A右手举杯，则攻击</param>         void a_RaiseEvent(string hand)         {             if (hand.Equals("right"))             {                 Attack();             }         }           /// <summary>         /// 首领摔杯时的动作         /// </summary>         void a_FallEvent()         {             Attack();         }         /// <summary>         /// 攻击         /// </summary>         public void Attack()         {             Console.WriteLine("c attack");         }     } }