线程已被中止- “Thread was being aborted”

遇到过这个exception么? 这个exception是为什么而产生的呢?

下面的代码段来自MSDN, 很有说明性.

 

简单来说, 就是当进程还想继续执行的时候, 发现自己已经被调用过Abort方法了. 既然自己作为线程已经被中止, 就无法执行罗, 于是exception丢了出来.

 

下面的代码来自MSDN, 说明问题:

The following example demonstrates aborting a thread. The thread that receives the ThreadAbortException uses the ResetAbort method to cancel the abort request and continue executing.

   1: using System;

   2: using System.Threading;

   3: using System.Security.Permissions;

   4:  

   5: public class ThreadWork {

   6:     public static void DoWork() {

   7:         try {

   8:             for(int i=0; i<100; i++) {

   9:                 Console.WriteLine("Thread - working."); 

  10:                 Thread.Sleep(100);

  11:             }

  12:         }

  13:         catch(ThreadAbortException e) {

  14:             Console.WriteLine("Thread - caught ThreadAbortException - resetting.");

  15:             Console.WriteLine("Exception message: {0}", e.Message);

  16:             Thread.ResetAbort();

  17:         }

  18:         Console.WriteLine("Thread - still alive and working."); 

  19:         Thread.Sleep(1000);

  20:         Console.WriteLine("Thread - finished working.");

  21:     }

  22: }

  23:  

  24: class ThreadAbortTest {

  25:     public static void Main() {

  26:         ThreadStart myThreadDelegate = new ThreadStart(ThreadWork.DoWork);

  27:         Thread myThread = new Thread(myThreadDelegate);

  28:         myThread.Start();

  29:         Thread.Sleep(100);

  30:         Console.WriteLine("Main - aborting my thread.");

  31:         myThread.Abort();

  32:         myThread.Join();

  33:         Console.WriteLine("Main ending."); 

  34:     }

  35: }

 

下面是输出结果:

Thread - working.

Main - aborting my thread.

Thread - caught ThreadAbortException - resetting.

Exception message: Thread was being aborted.

Thread - still alive and working.

Thread - finished working.

Main ending.