this.Invoke(new MethodInvoker(() =>
{this.rTxtLog.AppendText("在线程内调用主线程中控件 " + Environment.NewLine);
}));

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Text;
using System.Threading;
using System.Threading.Tasks;namespace 线程与异步委托练习
{class Program{//声明一个委托，public delegate int AddFunDel(int a, int b);static void Main(string[] args){Console.WriteLine("主线程{0}，已启动...", Thread.CurrentThread.ManagedThreadId);#region 线程////ParameterizedThreadStart  有参委托////ThreadStart   无参委托//Thread thread = new Thread(new ThreadStart(MyFun));////设置线程名称 给程序员看的。//thread.Name = "MyFun";////设置为后台线程。当主线程被关闭时，后台子线程自动被关闭。//thread.IsBackground = true;////更改状态，并没有执行，只是告诉CPU，可以执行了。//thread.Start();#endregion#region 有参线程////Thread thread2 = new Thread(new ParameterizedThreadStart(MyFun2));//Thread thread2 = new Thread(a => {//    while (true)//    {//        Console.WriteLine("子线程{0}，正在执行中。参数值：{1}", Thread.CurrentThread.ManagedThreadId, a);//        Thread.Sleep(1000);//    }//});//thread2.Name = "MyFun2";//thread2.IsBackground = true;////设置优先级，只是建议告诉CPU处理。//thread2.Priority = ThreadPriority.Highest;//thread2.Start(99);#endregion#region 异步委托//AddFunDel aDel = new AddFunDel(AddFun);////通过异步调用这个委托//IAsyncResult iresult = aDel.BeginInvoke(3, 5, null, null);////...异步委托，在新建子线程中执行委托中方法，主线程被阻塞状态。//int num = aDel.EndInvoke(iresult);//Console.WriteLine("计算结果：{0} , 执行线程{1}", num, Thread.CurrentThread.ManagedThreadId);#endregion#region 异步委托回调函数AddFunDel aDel = new AddFunDel(AddFun);//AsyncCallbackIAsyncResult iresult = aDel.BeginInvoke(3, 5, new AsyncCallback(MyAsyncCallback), 30);//主线程不会阻塞while (!iresult.IsCompleted) //IsCompleted 检测异步操作是否已完成。
            {Console.WriteLine("主线程继续执行中...");Thread.Sleep(1000);}#endregionConsole.ReadKey();}static void MyFun(){while (true){Console.WriteLine("子线程{0}，正在执行中。", Thread.CurrentThread.ManagedThreadId);Thread.Sleep(1000);}}static void MyFun2(object a){Console.WriteLine("子线程{0}，正在执行中。参数值：{1}", Thread.CurrentThread.ManagedThreadId, a);}static int AddFun(int a, int b){Console.WriteLine("子线程{0}，正在执行中，开始运算a+b", Thread.CurrentThread.ManagedThreadId);Thread.Sleep(5000);return a + b;}//异步委托回调函数static void MyAsyncCallback(IAsyncResult result){AsyncResult aResult = (AsyncResult)result; //封装类 通过接口 实现多态 AddFunDel addDel = (AddFunDel)aResult.AsyncDelegate; //封装委托int num = addDel.EndInvoke(result);  //获取异步操作结果Console.WriteLine("计算结果：{0} , 执行线程{1}", num, Thread.CurrentThread.ManagedThreadId);int i = (int)aResult.AsyncState; //BeginInvoke方法中最后一个参数Console.WriteLine("BeginInvoke最后一个参数调用：{0}", i);}}
}