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【CSharp】多线程作业
作者:codeeer / 发布于2014/7/17/ 557
1.线程池的简单实现 2.可操控的具有返回值的多线程作业

	///线程池

	void TaskTest(object Para)
	{
	 Console.WriteLine(Para);
	}
	
	void ThreadPoolTest()
	{
	 WaitCallback WB = new WaitCallback(TaskTest);
	 ThreadPool.QueueUserWorkItem(WB, "Playing...");
	}

	

	///多线程

	/*
	 * Go_TEST为测试样例
	 * Go_Core为线程核心执行代码
	 *
	 * 正在运行的线程数量：RunningThreadNumbers
	 * 暂停线程：Thread_Statu_Pause = checkBox1.Checked;
	 * 暂停取消：Thread_Statu_Exit = true;
	 * 提取线程（标识符GUID为[textBox2.Text]值）返回值
	 * for (int i = 0; i < ThreadNodeS_Pool.Count; i++)
	 {
	 if (ThreadNodeS_Pool[i].GUIDS == textBox2.Text)
	 {
	 if (ThreadNodeS_Pool[i].IsDone)
	 {
	 Console.WriteLine("指定线程：" + ThreadNodeS_Pool[i].GUIDS + " 返回值：" + ThreadNodeS_Pool[i].ReturnS);
	 textBox1.AppendText("指定线程：" + ThreadNodeS_Pool[i].GUIDS + " 返回值：" + ThreadNodeS_Pool[i].ReturnS + Environment.NewLine);
	 }
	 else
	 {
	 Console.WriteLine("指定线程：" + ThreadNodeS_Pool[i].GUIDS + "还在运行中，不能获取返回值");
	 textBox1.AppendText("指定线程：" + ThreadNodeS_Pool[i].GUIDS + "还在运行中，不能获取返回值" + Environment.NewLine);
	 }
	 }
	 }
	*/
	
	/// <summary>
	/// 暂停线程
	/// </summary>
	bool Thread_Statu_Pause = false;
	
	/// <summary>
	/// 中止线程
	/// </summary>
	bool Thread_Statu_Exit = false;
	
	/// <summary>
	/// 正在运行的线程数量
	/// </summary>
	public int RunningThreadNumbers = 0;
	
	/// <summary>
	/// 线程记录节点
	/// </summary>
	class ThreadNodeS
	{
	 /// <summary>
	 /// 用以识别线程标识
	 /// </summary>
	 string _GUIDS;
	
	 /// <summary>
	 /// 用以标识线程是否执行完毕
	 /// </summary>
	 bool _Done = false;
	
	 /// <summary>
	 /// 任务完成时标记为Done_Before
	 /// 等到计时器处理完毕由计时器标记Done
	 /// </summary>
	 bool _Done_Before = false;
	
	 /// <summary>
	 /// 用以标识线程是否取消
	 /// </summary>
	 bool _Cancel = false;
	
	 /// <summary>
	 /// 用以标识线程是否在运行
	 /// </summary>
	 bool _Running = false;
	
	 /// <summary>
	 /// 传递的参数
	 /// </summary>
	 string _ParaS;
	
	 public string GUIDS { get { return _GUIDS; } }
	 public string ParaS { get { return _ParaS; } }
	 public bool IsRunning { get { return _Running; } }
	 public bool IsDone { get { return _Done; } }
	 public bool IsDoneBefore { get { return _Done_Before; } }
	 public bool IsCancel { get { return _Cancel; } }
	
	 /// <summary>
	 /// 返回值
	 /// </summary>
	 public string ReturnS { set; get; }
	
	 /// <summary>
	 /// 重载线程记录节点
	 /// </summary>
	 /// <param name="GUID">识别码</param>
	 /// <param name="ParaS">参数</param>
	 public ThreadNodeS(string GUID = null, string ParaS = null)
	 {
	 if (GUID == null)
	 {
	 _GUIDS = Guid.NewGuid().ToString("N");
	 }
	 else
	 {
	 _GUIDS = GUID;
	 }
	
	 _ParaS = ParaS;
	
	 ReturnS = null;
	 }
	
	 /// <summary>
	 /// 启动线程执行
	 /// </summary>
	 public void Start() { _Running = true; }
	
	 /// <summary>
	 /// 线程执行完毕
	 /// （由计时器判定）
	 /// </summary>
	 public void Done() { _Done = true; }
	
	 /// <summary>
	 /// 线程执行完毕
	 /// （由线程自判定）
	 /// </summary>
	 public void Done_Before() { _Done_Before = true; _Running = false; }
	
	 /// <summary>
	 /// 线程取消
	 /// </summary>
	 public void Cancel() { _Cancel = true; _Running = false; }
	}
	
	/// <summary>
	/// 线程记录节点集合
	/// </summary>
	List<ThreadNodeS> ThreadNodeS_Pool = new List<ThreadNodeS>();
	
	/// <summary>
	/// 线程状态查看定时器
	/// </summary>
	System.Windows.Forms.Timer ThreadControlTimer = new System.Windows.Forms.Timer();
	
	/// <summary>
	/// 启动线程
	/// </summary>
	void ThreadGo()
	{
	 //刷新线程状态
	 Thread_Statu_Pause = false;
	 Thread_Statu_Exit = false;
	
	 //加入控制事件
	 ThreadControlTimer.Dispose();
	 ThreadControlTimer = new System.Windows.Forms.Timer();
	 ThreadControlTimer.Tick += TickTick;
	 ThreadControlTimer.Interval = 100;
	 ThreadControlTimer.Start();
	
	 //启动线程
	 for (int i = 0; i < ThreadNodeS_Pool.Count; i++)
	 {
	 Thread oThread = new Thread(Go_Core);
	 oThread.IsBackground = true;
	 oThread.Start(ThreadNodeS_Pool[i]);
	 }
	}
	
	/// <summary>
	/// 查看进度的定时器
	/// </summary>
	/// <param name="sender"></param>
	/// <param name="e"></param>
	void TickTick(object sender, EventArgs e)
	{
	 bool AllDone = true;
	
	 int RunningTemp = 0;
	
	 for (int i = 0; i < ThreadNodeS_Pool.Count; i++)
	 {
	 //初始化时线程的IsDoneBefore和IsDone都是False
	 //当线程执行完毕，IsDoneBefore为True，状态为期待定时器（TickTick）验收
	 if (ThreadNodeS_Pool[i].IsDoneBefore)
	 {
	 //当定时器确定线程执行完毕
	 //如果IsDone状态为False，执行验收处理
	 //验收结束时IsDone状态会被置为True，至此，这个线程的任务彻底结束
	 if (!ThreadNodeS_Pool[i].IsDone)
	 {
	 //验收处理
	 //输出线程返回结果
	 ThreadNodeS_Pool[i].Done();
	 Console.WriteLine(ThreadNodeS_Pool[i].ReturnS);
	 AllDone = false;
	 }
	 }
	 else if (ThreadNodeS_Pool[i].IsRunning)
	 {
	 RunningTemp++;
	 AllDone = false;
	 }
	 else
	 {
	 //只要有线程还没有进入IsDoneBefore状态，说明还有存活线程
	 AllDone = false;
	 }
	 }
	
	 RunningThreadNumbers = RunningTemp;//返回正在运行的线程数量
	
	 if (AllDone)
	 {
	 Console.WriteLine("线程全部执行完毕");
	 ThreadControlTimer.Stop();
	 }
	}
	
	/// <summary>
	/// 延时函数
	/// </summary>
	/// <param name="delayTime">需要延时多少秒</param>
	/// <returns></returns>
	bool Delay(int delayTime)
	{
	 DateTime now = DateTime.Now;
	 int s;
	 do
	 {
	 TimeSpan spand = DateTime.Now - now;
	 s = spand.Seconds;
	 Application.DoEvents();
	 }
	 while (s < delayTime);
	 return true;
	}
	
	/// <summary>
	/// 线程核心任务
	/// </summary>
	/// <param name="Para"></param>
	void Go_Core(object Para)
	{
	 ThreadNodeS SingleNode = (ThreadNodeS)Para;
	
	 #region 线程核心任务
	
	 Int32 ALL = 0;
	 for (int i = 0; i < 200000; i++)
	 {
	 //暂停线程
	 do
	 {
	 Delay(1);
	 }
	 while (Thread_Statu_Pause);
	
	 //取消线程
	 if (Thread_Statu_Exit)
	 {
	 SingleNode.Cancel();
	 break;
	 }
	
	 ALL += i;
	 }
	 Delay(2);
	 SingleNode.ReturnS = "GUID:" + SingleNode.GUIDS + " Para:" + SingleNode.ParaS + " ALL:" + ALL + " Cancel:" + SingleNode.IsCancel;
	
	 #endregion
	
	 SingleNode.Done_Before();
	}
	
	/// <summary>
	/// 这是一个测试示例
	/// 测试执行默认标识（GUID）计算
	/// 测试提取针对标识（GUID）"TEST99"的返回值
	/// </summary>
	void Go_TEST()
	{
	 //清空多线程节点集合
	 ThreadNodeS_Pool.Clear();
	
	 //设定多线程
	 for (int i = 0; i < 10; i++)
	 {
	 ThreadNodeS_Pool.Add(new ThreadNodeS(null, "Test -> " + i));
	 }
	 ThreadNodeS_Pool.Add(new ThreadNodeS("TEST99", "Test -> 99"));
	
	 //多线程启动
	 ThreadGo();
	}
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