How to zoom in and zoom out Images in WP7?

Question

I have made an application which displays Images .Now I want to implement zoom in and zoom out feature(by using two fingertip\'s) as in native windows phone photo viewer app

Answer 1

Perhaps the most expedient approach would be to include the Silverlight for Windows Phone Toolkit. This contains a GestureService that will help with pinch and rotate touch gestures. You could apply it to an image like this:-

Then in code-behind:-

    private void OnPinchStarted(object sender, PinchStartedGestureEventArgs e)
    {
        initialAngle = transform.Rotation;
        initialScale = transform.ScaleX;
    }

    private void OnPinchDelta(object sender, PinchGestureEventArgs e)
    {
        transform.Rotation = initialAngle + e.TotalAngleDelta;
        transform.ScaleX = initialScale * e.DistanceRatio;
        transform.ScaleY = initialScale * e.DistanceRatio;
    }