MSDN Timer.Elapsed示例如何在没有用户交互的情况下工作

Question

至少对我来说，这是使用System.Timers.Timer的完美示例。唯一的问题是，如果我消除Console.ReadLine()，它将不起作用。在我的情况下，我只想在5秒钟后显示一条消息，然后控制台就会关闭。就是这样。

假设我想在没有任何用户交互的情况下显示简单的消息Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime)，我该如何做到这一点？换句话说，当我按下F5时，我会看到空白的控制台窗口，5秒钟后我会看到消息，然后控制台就会消失。

以下是MSDN中的代码：

using System;
using System.Timers;
public class Example
{
    private static Timer aTimer;
    public static void Main()
    {
        // Create a timer with a two second interval.
        aTimer = new System.Timers.Timer(5000);
        // Hook up the Elapsed event for the timer. 
        aTimer.Elapsed += OnTimedEvent;
        aTimer.Enabled = true;
        Console.WriteLine("Press the Enter key to exit the program... ");
        Console.ReadLine();
        Console.WriteLine("Terminating the application...");
    }
    private static void OnTimedEvent(Object source, ElapsedEventArgs e)
    {
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
    }
}

Answer 1

using System;
using System.Threading;
using System.Timers;
using Timer = System.Timers.Timer;
private static Timer aTimer;
private static ManualResetEventSlim ev = new ManualResetEventSlim(false);
public static void Main()
{
    // Create a timer with a two second interval.
    aTimer = new System.Timers.Timer(5000);
    // Hook up the Elapsed event for the timer. 
    aTimer.Elapsed += OnTimedEvent;
    aTimer.Enabled = true;
    ev.Wait();
}
private static void OnTimedEvent(Object source, ElapsedEventArgs e)
{
    Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
    ev.Set();
}

Answer 2

有几种不同的方法。

这里有一个例子：

using System;
using System.Timers;
public class Example
{
   private static Timer aTimer;
   private static bool delayComplete = false;
   public static void Main()
   {
      // Create a timer with a two second interval.
      aTimer = new System.Timers.Timer(5000);
      // Hook up the Elapsed event for the timer. 
      aTimer.Elapsed += OnTimedEvent;
      aTimer.Enabled = true;
      while (!delayComplete)
      {
         System.Threading.Thread.Sleep(100);
      }
   }
   private static void OnTimedEvent(Object source, ElapsedEventArgs e)
   {
      Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
      delayComplete = true;
   }
}

Answer 3

当主线程终止时，应用程序将退出。这是执行Main（）的线程。你的计时器将在另一个线程上启动。所以，如果你不想做Console.ReadLine（），基本上你需要做的是Thread.Sleep（5000），其中5000是线程将睡眠的毫秒数。这将使您的主线程等待计时器启动。