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copied!<p>Have a look at <a href="https://stackoverflow.com/questions/1862590/how-to-update-gui-with-backgroundworker">this</a> question...</p> <p>cheers,</p> <p>EDIT:</p> <p>Joe - not sure if you're getting any closer to groking this, so I thought I'd try to put together a simple usage of BackgroundWorker to demonstrate how simple and powerful this class is!</p> <p>first - in your constructor...</p> <pre><code>public MainWindow() { InitializeComponent(); BackgroundWork worker = new BackgroundWorker(); worker = new BackgroundWorker(); worker.DoWork += new DoWorkEventHandler(worker_DoWork); worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted); System.Timers.Timer t = new System.Timers.Timer(10000); // 10 second intervals t.Elapsed += (sender, e) => { // Don't try to start the work if it's still busy with the previous run... if (!worker.IsBusy) worker.RunWorkerAsync(); }; } } </code></pre> <p>so we have set up something to delegate some work (in the method 'worker_DoWork') on a background thread... whatever happends in that method will not impact the UI thread, and it should look something like:</p> <pre><code>private void worker_DoWork(object sender, DoWorkEventArgs e) { // Whatever comes back from the lengthy process, we can put into e.Result e.Result = DoMyBigOperation(); } </code></pre> <p>Now when this thread completes, it will fire the RunWorkerCompleted event, which we have handled as such:</p> <pre><code>private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { // First, handle the case where an exception was thrown. if (e.Error != null) { // handle the System.Exception MessageBox.Show(e.Error.Message); } else if (e.Cancelled) { // now handle the case where the operation was cancelled... lblCase.Content = "The operation was cancelled"; } else { // Finally, handle the case where the operation succeeded lblCase.Content = e.Result.ToString(); } } </code></pre> <p>Hope this helps! IanR</p>

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