public void MouseWheelEventHandler(object sender, MouseWheelEventArgs e)        {            double oldScalX = ((ScaleTransform)canvas.RenderTransform).ScaleX;            double oldScalY = ((ScaleTransform)canvas.RenderTransform).ScaleY;            var storyBoard = new Storyboard();            //var group = new TransformGroup();            //var scale = new ScaleTransform(1.5, 1.5);            //group.Children.Add(scale);            //group.Children.Add(new TranslateTransform(300, 300));            //canvas.RenderTransform = group;            RegisterName("MainCanvas", canvas);            var growAnimation = new DoubleAnimation();            QuinticEase ee = new QuinticEase();            ee.EasingMode = EasingMode.EaseOut;            growAnimation.EasingFunction = ee;            growAnimation.From = oldScalX;            if (e.Delta > 0)            {                growAnimation.To = oldScalX + 0.2;            }            else            {                growAnimation.To = oldScalX - 0.2;            }            storyBoard.Children.Add(growAnimation);            var growAnimation2 = new DoubleAnimation();            QuinticEase ee2 = new QuinticEase();            ee2.EasingMode = EasingMode.EaseOut;            growAnimation2.EasingFunction = ee2;            growAnimation2.From = oldScalY;            if (e.Delta > 0)            {                growAnimation2.To = oldScalY + 0.2;            }            else            {                growAnimation2.To = oldScalY - 0.2;            }            storyBoard.Children.Add(growAnimation2);            Storyboard.SetTargetProperty(growAnimation, new PropertyPath("RenderTransform.ScaleX"));            Storyboard.SetTargetProperty(growAnimation2, new PropertyPath("RenderTransform.ScaleY"));            Storyboard.SetTargetName(growAnimation, "MainCanvas");            Storyboard.SetTargetName(growAnimation2, "MainCanvas");            storyBoard.Begin(this);        }

添加事件代码

private void UserControl_Loaded_1(object sender, RoutedEventArgs e)        {            Window.GetWindow(this).MouseWheel += MouseWheelEventHandler;        }