• Thread类线程常用操作


    创建线程

    线程是通过扩展 Thread 类创建的。扩展的 Thread 类调用 Start() 方法来开始子线程的执行。

    下面的程序演示了这个概念:

    class ThreadCreationProgram
        {
            public static void CallToChildThread()
            {
                Console.WriteLine("Child thread starts");
            }
           
            static void Main(string[] args)
            {
                ThreadStart childref = new ThreadStart(CallToChildThread);
                Console.WriteLine("In Main: Creating the Child thread");
                Thread childThread = new Thread(childref);
                childThread.Start();
                Console.ReadKey();
            }
        }

    当上面的代码被编译和执行时,它会产生下列结果:

    In Main: Creating the Child thread
    Child thread starts

    管理线程

    Thread 类提供了各种管理线程的方法。

    下面的实例演示了 sleep() 方法的使用,用于在一个特定的时间暂停线程。

    class ThreadCreationProgram
        {
            public static void CallToChildThread()
            {
                Console.WriteLine("Child thread starts");
                // 线程暂停 5000 毫秒
                int sleepfor = 5000;
                Console.WriteLine("Child Thread Paused for {0} seconds",
                                  sleepfor / 1000);
                Thread.Sleep(sleepfor);
                Console.WriteLine("Child thread resumes");
            }
           
            static void Main(string[] args)
            {
                ThreadStart childref = new ThreadStart(CallToChildThread);
                Console.WriteLine("In Main: Creating the Child thread");
                Thread childThread = new Thread(childref);
                childThread.Start();
                Console.ReadKey();
            }
        }

    当上面的代码被编译和执行时,它会产生下列结果:

    In Main: Creating the Child thread
    Child thread starts
    Child Thread Paused for 5 seconds
    Child thread resumes

    销毁线程

    Abort() 方法用于销毁线程。

    通过抛出 threadabortexception 在运行时中止线程。这个异常不能被捕获,如果有 finally 块,控制会被送至 finally 块。

    下面的程序说明了这点:

    class ThreadCreationProgram
        {
            public static void CallToChildThread()
            {
                try
                {
    
                    Console.WriteLine("Child thread starts");
                    // 计数到 10
                    for (int counter = 0; counter <= 10; counter++)
                    {
                        Thread.Sleep(500);
                        Console.WriteLine(counter);
                    }
                    Console.WriteLine("Child Thread Completed");
    
                }
                catch (ThreadAbortException e)
                {
                    Console.WriteLine("Thread Abort Exception");
                }
                finally
                {
                    Console.WriteLine("Couldn't catch the Thread Exception");
                }
    
            }
           
            static void Main(string[] args)
            {
                ThreadStart childref = new ThreadStart(CallToChildThread);
                Console.WriteLine("In Main: Creating the Child thread");
                Thread childThread = new Thread(childref);
                childThread.Start();
                // 停止主线程一段时间
                Thread.Sleep(2000);
                // 现在中止子线程
                Console.WriteLine("In Main: Aborting the Child thread");
                childThread.Abort();
                Console.ReadKey();
            }
        }

    当上面的代码被编译和执行时,它会产生下列结果:

    In Main: Creating the Child thread
    Child thread starts
    0
    1
    2
    In Main: Aborting the Child thread
    Thread Abort Exception
    Couldn't catch the Thread Exception
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  • 原文地址:https://www.cnblogs.com/lyl6796910/p/14517330.html
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