Question

I have a process that calls an event when its done.

void DoProcess()
{
    ...
    ...
    // Call finished event
    OnFinished();
}

I want to run this process many times.

My first idea was to recall the process each time the ‘Finished’ event was called.

void obj_Finished()
{
    DoProcess();        
}

Would this mean that the stack would get bigger and bigger? since the ‘Finished’ event would call its self wich would call the ‘Finished’ event etc…

Could I use anouther thread in some way to avoid this problem?

Is there a better deisgn pattern that i coudl use?

I would like the code to be quite efficient, however, I do like using events 🙂

Answer 1

Assuming WinForms or WPF: Use a BackgroundWorker.

You can run DoProcess in a simple loop and call Updateprogress to execute your event (synchronized).

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        var worker = sender as BackgroundWorker;

        while (true) // or something
        {
            DoProcess();
            worker.ReportProgress(0, null);
        }
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        OnFinished();
    }

This assumes that DoProcess does not touch the UI, it is running on another thread. ProgressChanged runs on the Main thread.