停止我的任务和我所有的等待任务

问题描述

我有一个应用程序，它从我的 Listbox 中取出所有添加的文件并播放这些文件:

i have an application who take all the added files from my Listbox and play this files:

IEnumerable<string> source

public void play()
{
    Task.Factory.StartNew(() =>
    {
        Parallel.ForEach(source,
                         new ParallelOptions
                         {
                             MaxDegreeOfParallelism = 1 //limit number of parallel threads
                         },
                         file =>
                         {
                              //each file process via another class
                         });
    }).ContinueWith(
            t =>
            {
                OnFinishPlayEvent();
            }
        , TaskScheduler.FromCurrentSynchronizationContext() //to ContinueWith (update UI) from UI thread
        );
    }

我的处理文件可以通过我的类属性停止，但如果我想停止所有文件等着我怎么办?

my processing file can be stop via my class property but if i want to stop all the filesthat waiting how can i do it ?

推荐答案

您需要设计您的例程以接受 CancellationToken，然后触发一个 CancellationTokenSource.Cancel().

You need to design your routines to accept a CancellationToken, and then trigger a CancellationTokenSource.Cancel().

这将允许您提供一种机制来合作取消您的工作.

This will allow you to provide a mechanism to cooperatively cancel your work.

有关详细信息，请参阅托管线程中的取消和MSDN 上的任务取消.

For details, see Cancellation in Managed Threads and Task Cancellation on MSDN.

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