C# 的异步调用 线程返回值 AsyncResult

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using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using TestEvent;using System.Threading;using System.Runtime.Remoting.Messaging;namespace WdjCSharp{    public delegate bool DelegtaeTestFunc();        // 声明回调函数    public delegate String TwoReturn(int a);    public partial class WdjControl : Form    {        public event DelegtaeTestFunc TestFunc = null;     // 定义一个回调函数变量 相当于定义一个回调函数的指针。        private Thread m_ThreadRun1 = null;        public WdjControl()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            //this.TestFunc = Class1.TestFunc;          // 给回调函数指针赋值            //TestFunc();                               // 调用回调函数            //m_ThreadRun1 = new Thread( new ThreadStart(TestFunc) );             FuncInvoke();        }        public void FuncInvoke()        {            TwoReturn handler = new TwoReturn(Class1.Add);            //用BeginInvoke开始异步操作 这里的 1,"字符串",这两个参数就是对应(int a, string b)            IAsyncResult result = handler.BeginInvoke(1,  new AsyncCallback(AddComplete), this);        }        public static String Add(int a)        {            //这里是处理的的函数            return a.ToString();        }        public static void AddComplete(IAsyncResult result)        {            TwoReturn handler = (TwoReturn)((AsyncResult)result).AsyncDelegate;            //调试一下就会明白了            MessageBox.Show(handler.EndInvoke(result));            MessageBox.Show(result.AsyncState.ToString());        }    }}