How to run PlaySound() in separate thread?

[fx.practic]

Hello.

While PlaySound() method playing sound - NT freezes.
This works in NT7, but not work in NT8:

OnBarUpdate()
{
   Thread thr = new Thread(My_Play_Sound); 
   thr.Start((object)"long");
}

void My_Play_Sound(object dir)
{
   PlaySound(Core.UserDataDir.ToString() + @"bin\Custom\Indicator\Sounds\"+     Instrument.MasterInstrument.Name +".wav");
   Thread.Sleep(600);
   PlaySound(Core.UserDataDir.ToString() + @"bin\Custom\Indicator\Sounds\"+     Range_Bar_Size +" "+ Bars.Period.Id.ToString() +".wav");
   Thread.Sleep(900);
   PlaySound(Core.UserDataDir.ToString() + @"bin\Custom\Indicator\Sounds\"+     "speed "+(string)dir +".wav");
} 

I tried naively variants

TriggerCustomEvent( My_Play_Sound, (object)"long"); 

and

TriggerCustomEvent( Play_Sound, (object)@"C:\MySound.wav"); 

but, they don't work too.


What is correct approach?

[NinjaTrader_Jim]

Hello fx.practic,

Thanks for opening the thread.

Creating a custom event would not tie your method to be run on a separate thread.

If you want to create your own thread and add certain code to it, you will have to manage the thread resource within your script. I would not advise to create new threads on each OnBarUpdate() iteration. If you add a print to the My_Play_Sound() method, you will see this gets printed numerous times in the output window. You may also observe that the PlaySound()'s are getting hit but they are end up "suspended" after too many instances.

Providing direction for using threads dives more into the realm of pure C# and begins to escape the scope of support that we provide. That said, I have made some modifications to your code to provide further direction.

Here is a link to the NinjaScript LifeCycle and OnStateChange() that provide further instruction on maintaining custom resources:

NinjaScript LifeCycle - http://ninjatrader.com/support/helpG...fecycle_of.htm

OnStateChange() - http://ninjatrader.com/support/helpG...tatechange.htm

Please let me know if I may be of further assistance.

[fx.practic]

Clear + brief = useful ))

Thanks a lot!