如何從這段代碼中得不到輸出？

Question

using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Text; 
    using System.Threading.Tasks; 
    using System.Timers; 

     namespace ConsoleApplication1 
     { 
      class Program 
      { 
       static void Main(string[] args) 
       { 
        Timer time = new Timer(); 
        time.Elapsed += new ElapsedEventHandler(action); 
        time.Interval = 5000; 
        time.Enabled = true; 

        time.Start(); 


       } 

       static void action(Object sender, ElapsedEventArgs args) 
       { 
        Console.WriteLine("haha\n"); 
       } 

      } 
     } 

這段代碼沒有任何輸出。誰能告訴我問題是什麼？非常感謝你。我遵循MSDN上的確切代碼。http://msdn.microsoft.com/en-us/library/system.timers.timer(v=vs.71).aspx

Answer 1

計時器立即超出範圍，因此永遠不會被調用。程序在有機會觸發該操作之前退出。

您可以通過time.start()後加入這個讓你的主要方法睡眠：

TimeSpan interval = new TimeSpan(0, 0, 2); 
Thread.Sleep(interval); 

Answer 2

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Timers; 

class Program 
{ 
    static void Main(string[] args) 
    { 
     while(true) 
     { 

     Timer time = new Timer(); 
     time.Elapsed += new ElapsedEventHandler(action); 
     time.Interval = 100; 
     time.Enabled = true; 

     time.Start(); 
     string line = Console.ReadLine(); // Get string from user 
     if (line == "exit") // Check for exit condition 
     { 
      break; 
     } 

    } 
    Console.WriteLine("End of Program\n"); 

} 

static void action(Object sender, ElapsedEventArgs args) 
{ 
    Console.WriteLine("haha\n"); 
} 

}