Built in background-scheduling system in .NET?

Question

I ask though I doubt there is any such system.

Basically I need to schedule tasks to execute at some point in the future (usually no more than a few seconds or possibly

Answer 1

Well.....Actually you can do exactly what you asked....

  IDisposable kill = null;

  kill = Scheduler.TaskPool.Schedule(() => DoSomething(), dueTime);

  kill.Dispose();

Using Rx the Reactive Framework from our buddies at Microsoft :)

Rx is quite amazing. I've all but replaced events with it. It is just plain yummy...

Hi I'm Rusty I'm an Rx addict...and I like it.

Answer 2

Since you don't want to have external reference, you might want to have a look at System.Threading.Timer, or System.Timers.Timer. Note that those classes are technically very different from the WinForms Timer component.

Answer 3

While not explicitly built-in to .NET, have you considered writing EXEs that you can schedule via Windows Scheduled Tasks? If you're using .NET, you'll probably be using Windows, and isn't this exactly what Scheduled Tasks is for?

I'm not aware of how to integrate scheduled tasks into a .NET solution, but surely you could write components that get called from scheduled tasks.

Answer 4

In addition to the answers supplied, this can also be done with the threadpool:

public static RegisteredWaitHandle Schedule(Action action, TimeSpan dueTime)
{
    var handle = new ManualResetEvent(false);
    return ThreadPool.RegisterWaitForSingleObject(
                                         handle, 
                                         (s, t) =>
                                         {
                                             action();
                                             handle.Dispose();
                                         }, 
                                         null, 
                                         (int) dueTime.TotalMilliseconds, true);
}

The RegisteredWaitHandle has an Unregister method that can be used to cancel the request

Answer 5

Use quartz.net (open source).

Answer 6

If you are willing ot use .NET 4, then the new System.Threading.Tasks provides a way to create custom schedulers for tasks. I haven't looked into it too closely, but it seems you could derive your own scheduler and let it run tasks as you see fit.