异步委托回调格局利用函数功能

我有异步代表其利用回调图案的样本代码。我使用的是标准代表，下面的代码工作正常。想要将其转换为Func委托（因为它期待和int并返回一个int），但由于某种原因 - 似乎卡住了。有人可以请帮忙吗？

class Program 
{ 
    public delegate int SomeDelegate(int x); 

    static void Main(string[] args) 
    { 
     Console.WriteLine("This is the CallBack Pattern Technique for Asynchronous Delegates in Threading"); 
     Console.WriteLine(""); 
     SomeDelegate sd = SquareNumber; 
     Console.WriteLine("[{0}] Before SquareNumber Method invoked.", Thread.CurrentThread.ManagedThreadId); 
     IAsyncResult asyncRes = sd.BeginInvoke(10, new AsyncCallback(CallbackMethod), null); 
     Console.WriteLine("[{0}] Back in Main after SquareNumber Method invoked. Doing Extra Processing.", Thread.CurrentThread.ManagedThreadId); 
     Console.WriteLine("[{0}] Main method processing completed.", Thread.CurrentThread.ManagedThreadId); 
     Console.ReadLine(); 
    } 

    static int SquareNumber(int a) 
    { 
     Console.WriteLine("[{0}] Inside SquareNumber - invoked. Processing......", Thread.CurrentThread.ManagedThreadId); 
     Thread.Sleep(5000); 
     return a * a; 
    } 

    static void CallbackMethod(IAsyncResult asyncRes) 
    { 
     Console.WriteLine("[{0}] Callback Invoked", Thread.CurrentThread.ManagedThreadId); 
     AsyncResult ares = (AsyncResult)asyncRes; 
     SomeDelegate delg = (SomeDelegate)ares.AsyncDelegate; 
     int res = delg.EndInvoke(asyncRes); 
     Console.WriteLine("[{1}] Result = {0}", res, Thread.CurrentThread.ManagedThreadId); 
    } 
}

感谢

来源

2013-05-02 Patrick

你已经发布了* does *工作的代码，但没有*不工作的代码 - 这使得修复代码无法工作的难度更大。 – 2013-05-02 14:46:43

Jon - 我正在学习更多关于通用Func和Action代表的知识，并希望在上面的上下文中使用它。似乎不能通过声明Func代表的第一行 – Patrick 2013-05-02 14:48:01

因此，张贴代码给你的问题。我们还没有看到你所尝试过的，所以我们看不出有什么问题。 – 2013-05-02 14:49:22

class Program 
    { 
     //public delegate int SomeDelegate(int x); 

     static void Main(string[] args) 
     { 
      Console.WriteLine("This is the CallBack Pattern Technique for Asynchronous Delegates in Threading"); 
      Console.WriteLine(""); 
      Func<int,int> sd = SquareNumber; 
      Console.WriteLine("[{0}] Before SquareNumber Method invoked.", Thread.CurrentThread.ManagedThreadId); 
      IAsyncResult asyncRes = sd.BeginInvoke(10, new AsyncCallback(CallbackMethod), null); 
      Console.WriteLine("[{0}] Back in Main after SquareNumber Method invoked. Doing Extra Processing.", Thread.CurrentThread.ManagedThreadId); 
      Console.WriteLine("[{0}] Main method processing completed.", Thread.CurrentThread.ManagedThreadId); 
      Console.ReadLine(); 
     } 

     static int SquareNumber(int a) 
     { 
      Console.WriteLine("[{0}] Inside SquareNumber - invoked. Processing......", Thread.CurrentThread.ManagedThreadId); 
      Thread.Sleep(5000); 
      return a * a; 
     } 

     static void CallbackMethod(IAsyncResult asyncRes) 
     { 
      Console.WriteLine("[{0}] Callback Invoked", Thread.CurrentThread.ManagedThreadId); 
      AsyncResult ares = (AsyncResult)asyncRes; 
      Func<int,int> delg = (Func<int,int>)ares.AsyncDelegate; 
      int res = delg.EndInvoke(asyncRes); 
      Console.WriteLine("[{1}] Result = {0}", res, Thread.CurrentThread.ManagedThreadId); 
     } 
    }

为我工作。

来源

2013-05-02 14:52:55 TheKingDave

谢谢 - 只是一个无赖。我没有得到那么容易的第二部分。感谢大家的帮助 – Patrick 2013-05-02 14:59:45

异步委托回调格局利用函数功能

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