如何杀死C#线程?

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问题描述

我有一个线程熄灭并在我们的(旧)SQL服务器上查找数据.

I've got a thread that goes out and looks up data on our (old) SQL server.

随着数据的进入，我将信息发布到模式对话框中-用户无法&所有这些处理正在进行中时，不应做任何其他事情.模态对话框只是为了让他们看到我在做某件事，并防止他们同时运行另一个查询.

As data comes in, I post information to a modal dialog box - the user can't & shouldn't do anything else while all this processing is going on. The modal dialog box is just to let them see that I'm doing something and to prevent them from running another query at the same time.

有时(很少)当代码调用SQL服务器时，服务器不响应(IT停机以进行维护，LAN线被切断或PC不在网络上)或人执行查询用完了时间.因此，模式对话框中确实有一个取消按钮.

Sometimes (rarely) when the code makes a call to the SQL server, the server does not respond (IT has it down for maintenance, the LAN line got cut, or the PC isn't on the network) or the person doing the query runs out of time. So, the modal dialog box does have a cancel button.

Thread对象(System.Threading.Thread)具有IsBackground=true.

The Thread object (System.Threading.Thread) has IsBackground=true.

当某人单击取消"时，我调用我的KillThread方法.

When someone clicks Cancel, I call my KillThread method.

注意:我不能在此类中使用BackgroundWorker组件，因为它已与某些Windows Mobile 5代码& WM5没有BackgroundWorker.

Note: I can NOT use the BackgroundWorker component in this class because it is shared with some Windows Mobile 5 code & WM5 does not have the BackgroundWorker.

void KillThread(Thread th) {
  if (th != null) {
    ManualResetEvent mre = new ManualResetEvent(false);
    Thread thread1 = new Thread(
      () =>
      {
        try {
          if (th.IsAlive) {
            //th.Stop();
            // 'System.Threading.Thread' does not contain a definition for 'Stop'
            // and no extension method 'Stop' accepting a first argument of type
            // 'System.Threading.Thread' could be found (are you missing a using
            // directive or an assembly reference?)
            th.Abort();
          }
        } catch (Exception err) {
          Console.WriteLine(err);
        } finally {
          mre.Set();
        }
      }
    );
    string text = "Thread Killer";
    thread1.IsBackground = true;
    thread1.Name = text;
    thread1.Start();
    bool worked = mre.WaitOne(1000);
    if (!worked) {
      Console.WriteLine(text + " Failed");
    }
    th = null;
  }
}

在输出"窗口中，我总是看到线程杀手失败"，但从未抛出异常.

In my Output Window, I always see "Thread Killer Failed" but no exception is ever thrown.

如何停止线程?

我在以下两个地方找到了最相关的帖子:

The best related posts I found where the two below:

我上面列出的方法似乎有些混乱.

There seems to be some confusion with the method I listed above.

首先，当有人单击取消"按钮时，此例程称为:

First, when someone clicks the cancel button, this routine is called:

void Cancel_Click(object sender, EventArgs e) {
  KillThread(myThread);
}

接下来，当我杀死线程时，我宁愿不必永远等待线程停止.同时，如果线程仍处于活动状态，我不想让我的代码继续进行.因此，我使用了ManualResetEvent对象. 不应该花整整一秒钟(1000毫秒)来停止线程，但是每次WaitOne方法超时时.

Next, when I go in to kill a thread, I'd rather not have to wait forever for the thread to stop. At the same time, I don't want to let my code proceed if the thread is still active. So, I use a ManualResetEvent object. It should not take a full second (1000ms) just to stop a thread, but every time the WaitOne method times out.

仍然在听想法.

box

如何杀死C#线程?

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