Windows service using BackgroundService cannot be stopped

Question

I'm using a Net Core 3.X BackgroundService and after publishing my code, I've installed the executable generated as a Windows Service.

On my ExecuteAsync method I have some code like this:

protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
    while (!stoppingToken.IsCancellationRequested)
    {
        //do something

        if(someConditionIsTrue)
        {
            await this.StopAsync(new CancellationToken());
        }
    }
}

That manual call on StopAsync stops the execution and exits from while loop, but when I go to services.msc I see that my Windows Service is still in running state although is not executing anything.

How can I stop the service automatically and not calling to "cmd \c sc stop..."?

Thanks

Answer 1

Your BackgroundService is stopping correctly, but the application is not being stopped.

To stop the application from a background service, inject a IHostApplicationLifetime and call it as such:

protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
  while (!stoppingToken.IsCancellationRequested)
  {
    //do something

    if (someConditionIsTrue)
    {
      _hostApplicationLifetime.StopApplication();
    }
  }
}

You don't need to call this.StopAsync because that will (eventually) be called by StopApplication.