Question

在我的控制台应用程序中，同步线程内的事件变得困难。

using System;
using System.Threading;
using System.Windows.Forms;

namespace ConsoleApplication1
{
    public class Example
    {
        private static Button _button;
        private static readonly EventWaitHandle Ewh = new EventWaitHandle(false, EventResetMode.ManualReset);
        private static readonly EventWaitHandle Btn = new EventWaitHandle(false, EventResetMode.ManualReset);

        [STAThread]
        public static void Main()
        {
            _button = new Button();
            _button.Click += _button_Click;
            for (int i = 0; i <= 0x4; i++)
            {
                var t = new Thread(ThreadProc);
                t.Start(i);
            }
            Console.WriteLine("Press ENTER to release a waiting thread.");
            Console.ReadLine();
            Ewh.Set();
            Console.ReadLine();
        }

        private static void _button_Click(object sender, EventArgs e)
        {
            Console.WriteLine(new Random().Next(0x1388));
            Thread.Sleep(10);
            Btn.Set();
        }

        public static void ThreadProc(object data)
        {
            _button.PerformClick();
            Btn.WaitOne();
            Btn.Reset();
            Console.WriteLine("Thread {0} blocks.", data);
            Ewh.WaitOne();
            Console.WriteLine("Thread {0} exits.", data);
        }
    }
}

应用程序将结果作为一些随机数后跟线程块，并在控制台上打印出信号EventWaithandle数据线程之后。

目标是按照

之类的方式打印数据

*随机数据

线程块

随机数据

线程块

...

线程退出

... *

示例输出

1234

线程2块

2345

线程0块

3456

线程1块

...

线程1退出

线程4退出

...

如何以这种方式同步线程内的线程和事件。

Answer 1

使用任务计划程序和同步上下文。在主线程中创建同步上下文，并将其传递给要在主线程中执行的任务。

Answer 2

这是我的代码。它为Btn使用AutoResetEvent。此外，我看到您正在创建Button并从后台线程访问它。我删除了这段代码，而是直接调用了ButtonClick方法。以下是生成的代码：

using System;
using System.Threading;
using System.Windows.Forms;

namespace ConsoleApplication1
{
    public class Example
    {
        private static Button _button;
        private static readonly EventWaitHandle Ewh = new EventWaitHandle(true, EventResetMode.ManualReset);
        private static readonly EventWaitHandle Btn = new EventWaitHandle(true, EventResetMode.AutoReset);
        [STAThread]
        public static void Main()
        {
            Ewh.Reset();
            _button = new Button();
            _button.Click += _button_Click;
            for (int i = 0; i <= 0x4; i++)
                new Thread(ThreadProc).Start(i);
            Console.WriteLine("Press ENTER to release a waiting thread.");
            Console.ReadLine();
            Ewh.Set();
            Console.ReadLine();
        }

        private static void _button_Click(object sender, EventArgs e)
        {
            Console.WriteLine(new Random().Next(0x1388));
            Thread.Sleep(10);
        }

        public static void ThreadProc(object data)
        {
            Btn.WaitOne();
            Console.WriteLine("Thread {0} blocks.", data);
            _button.PerformClick();
            Btn.Set();
            Ewh.WaitOne();
            Console.WriteLine("Thread {0} exits.", data);
        }
    }
}

同步线程和事件

2 个答案: