Question

Say I’m showing the user a form, and using a BackgroundWorker to do some work behind the scenes.

When the user clicks OK, I cannot continue until the BackgroundWorker has completed.
If it hasn’t finished when the user clicks Ok, I want to show a WaitCursor until it has, and then continue.

What’s the best way to implement this?

I know I could use a plain old Thread, and then do Thread.Join, but I like BackgroundWorker.

Can it be done nicely?

Answer 1

You could use this code, instead of BW

var resetEvent = new ManualResetEvent(false);
ThreadPool.QueueUserWorkItem(state =>
                {
                    Thread.Sleep(5000);//LongRunning task, async call
                    resetEvent.Set();
                });
resetEvent.WaitOne();// blocking call, when user clicks OK