Async Callback Delegate : Asynchronous « Thread « C# / CSharp Tutorial






using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Runtime.Remoting.Messaging;

  public delegate int BinaryOp(int x, int y);

  class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine("Main() invoked on thread {0}.",Thread.CurrentThread.ManagedThreadId); 
      BinaryOp b = new BinaryOp(Add);
      IAsyncResult iftAR = b.BeginInvoke(10, 10,new AsyncCallback(AddComplete),"adding these numbers.");
      Console.ReadLine();
    }
    static void AddComplete(IAsyncResult itfAR)
    {
      Console.WriteLine("AddComplete() invoked on thread {0}.",Thread.CurrentThread.ManagedThreadId); 
      AsyncResult ar = (AsyncResult)itfAR;
      BinaryOp b = (BinaryOp)ar.AsyncDelegate;
      Console.WriteLine("10 + 10 is {0}.", b.EndInvoke(itfAR));
      string msg = (string)itfAR.AsyncState;
      Console.WriteLine(msg);
    }
    static int Add(int x, int y){
      Console.WriteLine("Add() invoked on thread {0}.",Thread.CurrentThread.ManagedThreadId); 
      Thread.Sleep(5000);
      return x + y;
    }
  }








20.23.Asynchronous
20.23.1.Asynchronous Calls: IAsyncResult
20.23.2.Async Method
20.23.3.Asynchronous Calls with Return Values
20.23.4.Use async job to compute
20.23.5.Pass delegate to deal with the IAsyncResult
20.23.6.Call asynchronously
20.23.7.Use AsyncCallback
20.23.8.Async Delegate
20.23.9.Asynchronous Invocation Of Delegates
20.23.10.Async Callback Delegate
20.23.11.Asynchronous Results Pattern Example
20.23.12.AsyncCallback and file viewer
20.23.13.Asynchronous Writing, Asynchronous Reading