运行线程一定时间

Question

I have a method that reads my RFID reader with a thread,I want to keep this running for a certain amount of time,then stop it,whats the best way to do this?

For example:

Run:

ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);

Run for 5 seconds:

Stop:

ReaderAPI.Actions.Inventory.Stop();

Tried stopwatch but it's not threadsafe I think.

tried this:

    {
        Stopwatch stopwatch = new Stopwatch();
        TimeSpan RequiredTimeLine = new TimeSpan(0, 0, 0, 5, 0);
        TimeSpan timeGone = new TimeSpan();

        ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);
        stopwatch.Start();

        while (timeGone.Seconds < RequiredTimeLine.Seconds)
        {
            timeGone = stopwatch.Elapsed;
        }
        stopwatch.Stop();
        ReaderAPI.Actions.Inventory.Stop();
    }

Answer 1

System.Threading.Timer will help you to solve the problem

var timer = new Timer(new TimerCallback(StopInventory), null, 5000, Timeout.Infinite);
ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);

here is the stop method

private void StopInventory(object obj)
{
    ReaderAPI.Actions.Inventory.Stop();
    timer.Change( Timeout.Infinite , Timeout.Infinite ) ;
}

Answer 2

How about,

ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);
await Task.Delay(5000);
ReaderAPI.Actions.Inventory.Stop();

or if your method is not async .

ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);
Task.Delay(5000).Wait();
ReaderAPI.Actions.Inventory.Stop();

---

I would caveat this answer, if it is important that 5 second period has a very accurate duration? Task.Delay() and Thread.Sleep() are not appropriate, on their own, for high accuracy timing.

---

Incidentally, Stopwatch has a StartNew factory method so you can do,

var stopwatch = Stopwatch.StartNew();
// Thing to time.
stopwatch.Stop();

Answer 3

You can use Sleep:

ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);
System.Threading.Thread.Sleep(5000);
ReaderAPI.Actions.Inventory.Stop();

Or compare the elapsed time:

long ticks = DateTime.Ticks;
while(DateTime.Ticks - ticks < 50000000) // 5 seconds
{
    ReaderAPI.Actions.Inventory.Perform(null, null, antennainfo);
}
ReaderAPI.Actions.Inventory.Stop();