WPF 旋转动画问题。xaml里能成功，cs类里写就报错

[pengcong005]

这是XAML的方式，能成功：

<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)" Storyboard.TargetName="image4">
				<EasingDoubleKeyFrame KeyTime="0:0:1" Value="30">
					<EasingDoubleKeyFrame.EasingFunction>
						<CircleEase EasingMode="EaseInOut"/>
					</EasingDoubleKeyFrame.EasingFunction>
				</EasingDoubleKeyFrame>
			</DoubleAnimationUsingKeyFrames>

这是CS代码的方式，要说属性错误:

DoubleAnimation daRotation = new DoubleAnimation();
                daRotation.From = rd.Next(360);
                daRotation.To = rd.Next(360);
                daRotation.EasingFunction = new CircleEase() { EasingMode = EasingMode.EaseInOut };
                daRotation.Duration = new TimeSpan(0, 0, 0, 0, 1500);
                Storyboard.SetTargetProperty(daRotation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)"));
                Storyboard.SetTarget(daRotation, element);
                sb.Children.Add(daRotation);

百思不得其解啊。。。 大神们求助啊。。。

[心粘快乐]

亲,试试在调用动画之前加一句
element.RenderTransform = new RotateTransform();

[pengcong005]

[Quote=引用 2 楼 的回复:]
亲,试试在调用动画之前加一句
element.RenderTransform = new RotateTransform();
[/Quote]

谢谢， 解决了

[aggier]

element 这个对象在哪里定义了？？？？？？