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

I needed a Debounce method for Blazor and kept coming back to this page so I wanted to share my solution in case it helps others.

public class DebounceHelper
{
    private CancellationTokenSource debounceToken = null;

    public async Task DebounceAsync(Func func, int milliseconds = 1000)
    {
        try
        {
            // Cancel previous task
            if (debounceToken != null) { debounceToken.Cancel(); }

            // Assign new token
            debounceToken = new CancellationTokenSource();

            // Debounce delay
            await Task.Delay(milliseconds, debounceToken.Token);

            // Throw if canceled
            debounceToken.Token.ThrowIfCancellationRequested();

            // Run function
            await func(debounceToken.Token);
        }
        catch (TaskCanceledException) { }
    }
}

Example call on a search function

 await OnSearchInput(eventArgs)) />

@code {
    private readonly DebounceHelper debouncer = new DebounceHelper();

    private async Task OnSearchInput(ChangeEventArgs eventArgs)
    {
        await debouncer.DebounceAsync(async (cancellationToken) =>
        {
            // Search Code Here         
        });
    }
}