C# event debounce

Question

I\'m listening to a hardware event message, but I need to debounce it to avoid too many queries.

This is an hardware event that sends the machine status and I have t

Answer 1

This little gem is inspired by Mike Wards diabolically ingenious extension attempt. However, this one cleans up after itself quite nicely.

public static Action Debounce(this Action action, int milliseconds = 300)
{
    CancellationTokenSource lastCToken = null;

    return () =>
    {
        //Cancel/dispose previous
        lastCToken?.Cancel();
        try { 
            lastCToken?.Dispose(); 
        } catch {}          

        var tokenSrc = lastCToken = new CancellationTokenSource();

        Task.Delay(milliseconds).ContinueWith(task => { action(); }, tokenSrc.Token);
    };
}

Note: there's no need to dispose of the task in this case. See here for the evidence.

Usage

Action DebounceToConsole;
int count = 0;

void Main()
{
    //Assign
    DebounceToConsole = ((Action)ToConsole).Debounce(50);

    var random = new Random();
    for (int i = 0; i < 50; i++)
    {
        DebounceToConsole();
        Thread.Sleep(random.Next(100));
    }
}

public void ToConsole()
{
    Console.WriteLine($"I ran for the {++count} time.");
}