error loading Progressring (Mahapps)

Question

I have a Progressring on a Page in WPF that needs to be displayed while the Grid is being loaded (Goal: Show the user that you are loading) and then be disabled when loading it has been completed. Only you’re making that mistake:

 public ClienteListPage()
        {
            InitializeComponent();
            carregar();
        } 
        
        public void carregar()
        {
            prProgresso.IsActive = true;
            Task.Factory.StartNew(() =>
            {
                DataContext = App.container.GetService<IClientesListarController>();
            }).ContinueWith(task =>
            {
                prProgresso.IsActive = false;
                if (task.IsFaulted)
                {
                    Console.WriteLine("{0} Exception caught.", task.Exception);
                    MessageBox.Show("Error");
                }
            }, System.Threading.CancellationToken.None, TaskContinuationOptions.None, TaskScheduler.FromCurrentSynchronizationContext());
        }

Someone knows how to help me?

Answer 1

You’re in trouble because you’re running this in another thread.

o . NET has a class called Backgroundworker, which provides methods to report thread progress in an event. The event is automatically called in the topic that created the Backgroundworker (usually the UI segment).

Use this event "Progresschanged" and update the progress bar in this event handler.