silverlight - Silverlight“未指定动画目标。”

Question

我有这段代码，但我不能使用它，因为当我调用 sb.Begin() 时会抛出异常：

未指定动画目标。

    public void TableCardAnimation(UserControl cardControl, double Height, double Width)
    {
        Storyboard sb = new Storyboard();
        DoubleAnimation animHeight = new DoubleAnimation();
        animHeight.Duration = new Duration(new TimeSpan(0, 0, 2));
        animHeight.From = cardControl.Height;
        animHeight.To = Height;
        sb.Children.Add(animHeight);
        Storyboard.SetTarget(animHeight, cardControl);
        Storyboard.SetTargetProperty(animHeight, new PropertyPath("(Height)"));


        DoubleAnimation animWidth = new DoubleAnimation();
        animWidth.Duration = new Duration(new TimeSpan(0, 0, 2));
        animWidth.From = cardControl.Width;
        animWidth.To = Width;
        sb.Children.Add(animWidth);
        Storyboard.SetTarget(animWidth, cardControl);
        Storyboard.SetTargetProperty(animHeight, new PropertyPath("(Width)"));

        sb.Begin();
    }

我哪里错了？:(

Answer 1

显然这只是一个打字错误。

在行中：

Storyboard.SetTargetProperty(animHeight, new PropertyPath("(Width)"));

您已经为animHeight辅助设置了目标属性，但您的 animWidth 目标属性仍未设置。你可能想做：

Storyboard.SetTargetProperty(animWidth, new PropertyPath("(Width)"));

为什么你使用"(Width)"just "Width"？