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.

using System;
using System.Threading;
using System.Security.Permissions;

public class ThreadWork {
    public static void DoWork() {
        try {
            for(int i=0; i<100; i++) {
                Console.WriteLine("Thread - working.");
                Thread.Sleep(100);
            }
        }
        catch(ThreadAbortException e) {
            Console.WriteLine("Thread - caught ThreadAbortException - resetting.");
            Console.WriteLine("Exception message: {0}", e.Message);
            Thread.ResetAbort();
        }
        Console.WriteLine("Thread - still alive and working.");
        Thread.Sleep(1000);
        Console.WriteLine("Thread - finished working.");
    }
}

class ThreadAbortTest {
    public static void Main() {
        ThreadStart myThreadDelegate = new ThreadStart(ThreadWork.DoWork);
        Thread myThread = new Thread(myThreadDelegate);
        myThread.Start();
        Thread.Sleep(100);
        Console.WriteLine("Main - aborting my thread.");
        myThread.Abort();
        myThread.Join();
        Console.WriteLine("Main ending.");
    }
}

 

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.