使用自定义任务工厂创建但不启动任务? [英] Create but not start a task with a custom task factory?

问题描述

我希望能够在不启动的情况下创建任务，类似于运行 var a = new Task();a.Start(); 但使用自定义工厂.工厂提供了 StartNew()，但是我找不到将这两个操作分开的方法.这可能吗?

I'd like to be able to create a task without starting it, similar to running var a = new Task(); a.Start(); but with a custom factory. Factories provide StartNew(), but I can't find a method to separate the two actions. Is this possible?

推荐答案

TaskFactory 基本上是两组默认选项(创建和延续)、默认取消令牌和任务调度程序.

A TaskFactory is basically two sets of default options (creation and continuation), a default cancellation token, and a task scheduler.

您可以在刚刚新建任务时指定取消令牌和创建选项 - 然后在您想要的任何调度程序上启动它.所以:

You can specify the cancellation token and the creation options when you just new up a task - and then start it on whatever scheduler you want. So:

Task task = new Task(action,
                     factory.CancellationToken,
                     factory.CreationOptions);
...
task.Start(factory.Scheduler);

应该完成除继续选项之外的工作.延续选项仅在您添加延续时才相关，您可以直接指定.是否有任何未涵盖的内容?

should do the job other than continuation options. The continuation options are only relevant when you add a continuation anyway, which you can specify directly. Is there anything which isn't covered by this?

(需要注意的一点是，基于任务的异步模式通常围绕热"任务展开，这些任务无论如何都会在您看到它们时启动.因此，您可能希望避免过于广泛地暴露未启动的任务.)

(One thing to note is that the Task-based Asynchronous Pattern generally revolves around "hot" tasks which are started by the time you see them anyway. So you probably want to avoid exposing the unstarted tasks too widely.)

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