Question

I am navigating from some window window1 to Mainwindow

In my MainWindow_loaded Method i have too much computation so when i navigate to main window windows goes white untill all computation finished and window loaded

I tried in MainWindow

 private void MainWindow_Loaded_1(object sender, RoutedEventArgs e)

 BackgroundWorker worker = new BackgroundWorker();

       worker.DoWork += (o, ea) =>
        {
             do large computation
          };

          worker.RunWorkerCompleted += (o, ea) =>
           {

               _busy.IsBusy = false;
          };
         _busy.IsBusy = true;
         worker.RunWorkerAsync();

}

But problem is that it navigates to Mainwindow without computation of necessary data in loaded event handler and doesnt even show waiting bar in UI ? ?
Is it possible to show waiting bar and all computation of data in MainWindow_Loaded?

I have used ExtendedWpfToolkit for _busy which is busy indicator

Answer 1

You can subscribe your background worker to report progress.

worker.WorkerReportsProgress = true;

And now you can have this progress report be triggered by an event you subscribe to.

worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged);

In doing so, you can create a progress bar than can update itself based on this worker_ProgressChanged event, triggered by your computation.

It appears you’ve already figured out IsBusy, so you can have your progress bar show only when this is true.