BeginInvoke()使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Xml;
using System.Threading;
namespace ConsoleApplication1

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine("Client application is starting!");

Thread.CurrentThread.Name = "Main Thread";

Cal cal = new Cal();

AddDelegate del = new AddDelegate(cal.Add);
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> 需要保存 IAsyncResult 对象以便后边条用EndInvoke方法时作参数传递</span>
        IAsyncResult asyncResult = del.BeginInvoke(<span style="color: #800080;">5</span>, <span style="color: #800080;">6</span>, <span style="color: #0000ff;">null</span>, <span style="color: #0000ff;">null</span><span style="color: #000000;">);

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> 做某些其它的事情，模拟需要执行 3 秒钟</span>
        <span style="color: #0000ff;">for</span> (<span style="color: #0000ff;">int</span> i = <span style="color: #800080;">1</span>; i &lt;= <span style="color: #800080;">3</span>; i++<span style="color: #000000;">)
        {
            Thread.Sleep(TimeSpan.FromSeconds(i));
            Console.WriteLine(</span><span style="color: #800000;">"</span><span style="color: #800000;">{0}: Client executed {1} second(s).</span><span style="color: #800000;">"</span><span style="color: #000000;">, Thread.CurrentThread.Name, i);
        }

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> 传递 IAsyncResult 对象</span>
        <span style="color: #0000ff;">int</span> rtnVal =<span style="color: #000000;"> del.EndInvoke(asyncResult);
        Console.WriteLine(</span><span style="color: #800000;">"</span><span style="color: #800000;">Result: {0}\n</span><span style="color: #800000;">"</span><span style="color: #000000;">, rtnVal);

        Console.WriteLine(</span><span style="color: #800000;">"</span><span style="color: #800000;">\nPress any key to exit...</span><span style="color: #800000;">"</span><span style="color: #000000;">);
        Console.ReadLine();

    }

    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">delegate</span> <span style="color: #0000ff;">int</span> AddDelegate(<span style="color: #0000ff;">int</span> a, <span style="color: #0000ff;">int</span><span style="color: #000000;"> b);

    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> Cal
    {
        </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">int</span> Add(<span style="color: #0000ff;">int</span> a, <span style="color: #0000ff;">int</span><span style="color: #000000;"> b)
        {
            </span><span style="color: #0000ff;">if</span><span style="color: #000000;"> (Thread.CurrentThread.IsThreadPoolThread)
            {
                Thread.CurrentThread.Name </span>= <span style="color: #800000;">"</span><span style="color: #800000;">Pool Thread</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            }
            Console.WriteLine(</span><span style="color: #800000;">"</span><span style="color: #800000;">Method invoked!</span><span style="color: #800000;">"</span><span style="color: #000000;">);

            </span><span style="color: #008000;">//</span><span style="color: #008000;"> 做某些其它的事情，模拟需要执行 2 秒钟</span>
            <span style="color: #0000ff;">for</span> (<span style="color: #0000ff;">int</span> i = <span style="color: #800080;">0</span>; i &lt; <span style="color: #800080;">2</span>; i++<span style="color: #000000;">)
            {
                Thread.Sleep(TimeSpan.FromSeconds(</span><span style="color: #800080;">1</span><span style="color: #000000;">));
                Console.WriteLine(</span><span style="color: #800000;">"</span><span style="color: #800000;">{0}: Add executed {1} second(s).</span><span style="color: #800000;">"</span><span style="color: #000000;">, Thread.CurrentThread.Name, i);
            }
            Console.WriteLine(</span><span style="color: #800000;">"</span><span style="color: #800000;">Method complete!</span><span style="color: #800000;">"</span><span style="color: #000000;">);
            </span><span style="color: #0000ff;">return</span> a +<span style="color: #000000;"> b;
        }
    }
}

}