Pass variable from InvokeAsync to outside

[renner1984]

How would I retrieve a variable from within Dispatcher.InvokeAsync to use outside of it?

int GetFixedPosSize()
{
int fps = 1;
Dispatcher.InvokeAsync((() => {
NinjaTrader.Gui.Tools.QuantityUpDown quantitySelector = (Window.GetWindow(ChartControl.Parent).FindFirst(" ChartTraderControlQuantitySelector") as NinjaTrader.Gui.Tools.QuantityUpDown);

fps = quantitySelector.Value;
}));
return(fps);
}

So here, how would I get the changed "fps" value within Dispatcher.InvokeAsync to use outside and return in "return"?

Thanks.

[NinjaTrader_BrandonH]

Hello renner1984,

Thanks for your post.

You would need to make "fps" a class-level variable and remove the int fps = 1 variable from the code you shared.

That method would still be able to be used but you would need to make it a void and not a return method.

Note that InvokeAsync is not going to be executed immediately. It will execute when the thread allows for it so "fps" could be set later after the logic that calls that method is called. For example, if you called that code in OnBarUpdate, the value might not be available until the next bar or later.

Further, you should use ChartControl.Dispatcher instead of Dispatcher since that control you are accessing is a control on the ChartControl.

Multi-Threading Consideration for NinjaScript: https://ninjatrader.com/support/help...-threading.htm

See this forum thread which shows a private variable and the correct dispatcher: https://forum.ninjatrader.com/forum/...t=2#post787509

[QuantKey_Bruce]

Like this?

https://stackoverflow.com/questions/2491927/how-to-return-a-value-with-dispatcher-invoke