如何中止/取消 TPL 任务?

本文介绍了如何中止/取消 TPL 任务?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在一个线程中，我创建了一些 System.Threading.Task 并启动每个任务.

In a thread, I create some System.Threading.Task and start each task.

当我执行 .Abort() 来终止线程时，任务不会中止.

When I do a .Abort() to kill the thread, the tasks are not aborted.

如何将 .Abort() 传输到我的任务?

How can I transmit the .Abort() to my tasks ?

推荐答案

你不能.任务使用线程池中的后台线程.也不推荐使用 Abort 方法取消线程.你可以看看 以下博客文章解释了使用取消令牌取消任务的正确方法.举个例子:

You can't. Tasks use background threads from the thread pool. Also canceling threads using the Abort method is not recommended. You may take a look at the following blog post which explains a proper way of canceling tasks using cancellation tokens. Here's an example:

class Program { static void Main() { var ts = new CancellationTokenSource(); CancellationToken ct = ts.Token; Task.Factory.StartNew(() => { while (true) { // do some heavy work here Thread.Sleep(100); if (ct.IsCancellationRequested) { // another thread decided to cancel Console.WriteLine("task canceled"); break; } } }, ct); // Simulate waiting 3s for the task to complete Thread.Sleep(3000); // Can't wait anymore => cancel this task ts.Cancel(); Console.ReadLine(); } }