How to respond to toast notifcations in MVVMCross UWP app

Question

I have a windows UWP app written with MVVPCross. The application method OnActivated is called when the user clicks on a Toast Notifcation message.

protected override void OnActivated(IActivatedEventArgs e)
{
    // Handle toast activation
    if (e is ToastNotificationActivatedEventArgs)
    {
        var toastActivationArgs = e as ToastNotificationActivatedEventArgs;

    }
}

When I get this event it want to:

• clear the navigation history
• Renavigate to the home page with information passed to it from the toast event
• The home page will then reload itself and set the initial selection based on info passed to it

I'm looking for guidance how I can force a navigation via the mvvmcross framework. I know how to navigate from one view model to another but in this case, I'm not in the context of a view or a view model - i'm in the context of the Windows.UI.Xaml.Application object.

thanks, michael

Answer 1

I think the only thing you need is instance of current frame

        if (args.Kind == ActivationKind.ToastNotification)
        {
            try
            {
                if (args.PreviousExecutionState == ApplicationExecutionState.Running)
                {
                    var fr = Window.Current.Content as Frame;
                    var toastActivationArgs = args as ToastNotificationActivatedEventArgs;
                    fr.Navigate(typeof(MainPage), toastActivationArgs);
                }
            }
            catch { }
        }

In your MainPage OnNavigatedTo action you can get Navigation parameters and do whatever you want .