CODEWITHSUNDEEP
silverlightwindows-phonewindows-phone-8
Jonas Stawski
Jonas Stawski

Reputation: 6752

How to crop image on ScheduledTaskAgent in Windows Phone

I need to crop an image using a ScheduledTaskAgent. Since it runs in the background I get a cross-thread exception when trying to instantiate a WriteableBitmap (as it needs to be created in the UI thread). I have a stream of the image, how would I go about cropping it without using a WriteableBitmap?

Thanks

Upvotes: 1

Views: 583

Answers (1)

Kevin Gosse
Kevin Gosse

Reputation: 39027

You can use the dispatcher (and therefore the UI thread) even in a background agent:

protected override void OnInvoke(ScheduledTask task)
{
    Deployment.Current.Dispatcher.BeginInvoke(() =>
    {
        // Use the WriteableBitmap here

        this.NotifyComplete();
    });
}

Upvotes: 4

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