backgroundworker

Observe the following piece of code: var handler = GetTheRightHandler(); var bw = new BackgroundWorker(); bw.RunWorkerCompleted += OnAsyncOperationCompleted; bw.DoWork += OnDoWorkLoadChildren; bw.RunWorkerAsync(handler); Now suppose I want to wait until bw finishes working. What is the right way to do so? My solution is this: bool finished = false; var handler = GetTheRightHandler(); var bw = new BackgroundWorker(); bw.RunWorkerCompleted += (sender, args) => { OnAsyncOperationCompleted(sender, args); finished = true; }); bw.DoWork += OnDoWorkLoadChildren; bw.RunWorkerAsync(handler); int

Let's say I have a background worker like this: private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { while(true) { //Kill zombies } } How can I make this background worker start and stop using a button on a WinForm? Fredrik Mörk This is how to do it (link to answer below) Maybe you can use a manualresetevent like this, I didn't debug this but worth a shot. If it works you won't be having the thread spin its wheels while it's waiting ManualResetEvent run = new ManualResetEvent(true); private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { while(run.WaitOne

I need to make RunWorkerAsync() return a List<FileInfo> . How can I return an object from a background worker? In your DoWork event handler for the BackgroundWorker (which is where the background work takes place) there is an argument DoWorkEventArgs . This object has a public property object Result. When your worker has generated its result (in your case, a List<FileInfo> ), set e.Result to that, and return. Now that your BackgroundWorker has completed its task, it triggers the RunWorkerCompleted event, which has a RunWorkerCompletedEventArgs object as an argument. RunWorkerCompletedEventArgs

In my WPF application I need to do an async-operation then I need to update the GUI. And this thing I have to do many times in different moment with different oparations. I know two ways to do this: Dispatcher and BackgroundWorker. Because when I will chose it will be hard for me to go back, I ask you: what is better? What are the reasons for choosing one rather than the other? Thank you! Pileggi The main difference between the Dispatcher and other threading methods is that the Dispatcher is not actually multi-threaded. The Dispatcher governs the controls, which need a single thread to