1、线程状态ThreadState

  在C#中,线程对象Thread使用ThreadState属性指示线程状态,它是带Flags特性的枚举类型对象。

  ThreadState 为线程定义了一组所有可能的执行状态。一旦线程被创建,它就至少处于其中一个状态中,直到终止。在公共语言运行时中创建的线程最初处于Unstarted状态中,而进入运行时的外部线程则已经处于Running状态中。通过调用 Start可以将Unstarted线程转换为Running状态。并非所有的  ThreadState值的组合都是有效的;例如,线程不能同时处于Aborted和Unstarted状态中。

  因此判断线程当前的状态必须用bitmask按位运算来达到判断目的,不能直接使用相等来判断。

  2、C#中ThreadState中定义如下:

aaarticlea/png;base64,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" alt="" />

  3、如何判断当前线程状态

  1)判断线程是否处于取消状态

(MyThread.ThreadState & ThreadState.AbortRequested) != 0

2)判断线程是否处于运行状态

    这个有一点特殊,因为ThreadState.Running本身等于0,不能用&运算,所以判断可用以下方法:

       (MyThread.ThreadState == ThreadState.Running)
 
  注:以上内容转载自:http://blog.csdn.net/shuaihj/article/details/41315903
 

   4、.Net 中如何启动线程

  .net下的线程,是通过设置委托对象来初始化,启动的。

  委托是一个继承自多播委托的类型,委托对象可以赋值的方式指向一个或多个方法。 

 public void Test()
{
Thread thread = new Thread(new ThreadStart(ThreadMethod));
thread.Start();//开辟一个线程,执行方法
}

 

  推荐:http://zhoufoxcn.blog.51cto.com/792419/187031/ 这篇文章主要讲的是使用委托启动线程(带参、无参启动以及优劣比较)。

  本文仅做为笔记使用,若需转载,请转载文章原文!

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