有一组任务，一次只运行 X [英] Have a set of Tasks with only X running at a time

问题描述

假设我有 100 个任务，这些任务需要 10 秒才能完成.现在我只想一次运行 10 个，比如当这 10 个中的 1 个完成另一个任务时，直到所有任务都完成.

Let's say I have 100 tasks that do something that takes 10 seconds. Now I want to only run 10 at a time like when 1 of those 10 finishes another task gets executed till all are finished.

现在我总是使用 ThreadPool.QueueUserWorkItem() 来完成这样的任务，但我读到这样做是不好的做法，我应该改用 Tasks.

Now I always used ThreadPool.QueueUserWorkItem() for such task but I've read that it is bad practice to do so and that I should use Tasks instead.

我的问题是我没有找到适合我的场景的好例子，所以你能告诉我如何使用 Tasks 实现这个目标吗?

My problem is that I nowhere found a good example for my scenario so could you get me started on how to achieve this goal with Tasks?

推荐答案

SemaphoreSlim maxThread = new SemaphoreSlim(10);

for (int i = 0; i < 115; i++)
{
    maxThread.Wait();
    Task.Factory.StartNew(() =>
        {
            //Your Works
        }
        , TaskCreationOptions.LongRunning)
    .ContinueWith( (task) => maxThread.Release() );
}

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