控制台测试异步委托

根据Chris Sells的代码修改

英文版原作者：Chris Sells（http://www.sellsbrothers.com/writing/default.aspx?content=delegates.htm）



The following is an excerpt from Windows Forms 2.0 Programming

 

  1using System;
  2using System.Collections.Generic;
  3using System.Text;
  4using System.Threading;
  5
  6namespace AsyncDelegate
  7{
  8   
  9
 10    delegate void WorkStarted();
 11    delegate void WorkProgressing();
 12    delegate int WorkCompleted();
 13
 14    class Worker
 15    {
 16        public event WorkStarted Started;
 17        public event WorkProgressing Progressing;
 18        public event WorkCompleted Completed;
 19        private static string _name;
 20
 21        public Worker(string name)
 22        {
 23            _name = name;
 24        }
 25        public void DoWork()
 26        {
 27          
 28          
 29            if (this.Started != null)
 30                this.Started();
 31            ConsoleOutPut("started");
 32
 33            ConsoleOutPut("progressing");
 34       
 35            if (this.Progressing != null)
 36                this.Progressing();
 37            ConsoleOutPut("completed");
 38          
 39
 40            if (this.Completed != null)
 41            {
 42                foreach (WorkCompleted wc in this.Completed.GetInvocationList())
 43                {
 44                    WorkCompleted wc2 = wc;
 45                    AsyncCallback callback=delegate(IAsyncResult result)
 46                    {
 47                    
 48                       
 49                            int grade = wc2.EndInvoke(result);
 50                            Console.WriteLine("Worker grade= {0}", grade);
 51                     
 52                       
 53                    };
 54                  IAsyncResult ar =  wc.BeginInvoke(callback, null);
 55                 //当异步调用开始但未完成时做UI状态模拟处理
 56                  while (!ar.IsCompleted)
 57                        {
 58
 59                            
 60
 61                            Console.WriteLine("Worker grade is processing");
 62
 63                            Thread.Sleep(1000);
 64
 65                        }
 66                }
 67            }
 68        }
 69
 70        public static void ConsoleOutPut(string endcontext)
 71        {
 72            Console.Write("Worker ");
 73            Console.ForegroundColor = ConsoleColor.Cyan;
 74            Console.Write("{0}", _name);
 75            Console.ForegroundColor = ConsoleColor.DarkGreen;
 76            Console.WriteLine(":work {0}", endcontext);
 77        }
 78
 79        public static void ConsoleOutPut(string precontext, string endcontext)
 80        {
 81            
 82            Console.Write("{0} ", precontext);
 83            Console.ForegroundColor = ConsoleColor.Cyan;
 84            Console.Write("{0}", _name);
 85            Console.ForegroundColor = ConsoleColor.DarkGreen;
 86            Console.WriteLine(" {0}", endcontext);
 87        }
 88    }
 89
 90    class Boss
 91    {
 92        public int WorkCompleted()
 93        {
 94            System.Threading.Thread.Sleep(2000);
 95            Console.WriteLine("Better");
 96            return 5;  
 97        }
 98    }
 99
100    class Universe
101    {
102          void WorkerStartedWork()
103        {
104            Console.WriteLine("Universe notices worker starting work");
105        }
106
107        static int WorkerCompletedWork()
108        {
109            System.Threading.Thread.Sleep(3000);
110            Console.WriteLine("Universe pleased with worker's work");
111            return 7;
112        }
113
114        static void Main()
115        {
116            String name = "";
117            Console.Title = "控制台测试异步委托";
118            Console.ForegroundColor = ConsoleColor.DarkGreen; 
119            Console.Write("Please enter worker's name here:");
120            Console.ForegroundColor = ConsoleColor.Magenta;
121            name = Console.ReadLine();
122            Console.ForegroundColor = ConsoleColor.DarkGreen;
123            Console.BackgroundColor = ConsoleColor.Black; 
124            Console.Beep();
125
126
127            Worker peter = new Worker(name);
128            Worker.ConsoleOutPut("Hello!", "Good Morning!");
129            Boss boss = new Boss();
130            Universe u = new Universe();
131            peter.Completed += boss.WorkCompleted;
132            peter.Started += u.WorkerStartedWork;
133            peter.Completed += Universe.WorkerCompletedWork;
134            peter.DoWork();
135
136            Console.WriteLine("Main: worker completed work");
137            Console.Read();
138        }
139    }
140
141  
142
143}
144