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我<Path>在画布上通过<Viewbox>. <Viewbox>也是嵌套的。我想更改<Path>它们的位置与传感器数据位置匹配时的不透明度。该代码一直有效到 Begin() 方法。它不会给出错误，它不会做任何事情。我还尝试创建不同NameScopes但无法确定正确的命名空间。除此以外的任何东西this都不能进入 Begin() 方法。如果我在 if 语句中创建一个新的范围：“ if (wantedNode is System.Windows.Shapes.Path)”，它会使其成为 Begin() 一次，不会触发，并且永远不会回来！

if (angle > 0)
        { 
            if (angle <= 180 && angle > 150)
            {
                if (mag <= sweetSpot)
                {
                    //posAlertTxt.Text = "On target...";
                }
                else if (mag <= step)
                {
                    selectedStep = "step0108";
                }
                else if (mag <= step * 2)
                .
                .
                .
                .

在涵盖了所有角度和大小之后：

 redBrush.Color = Colors.IndianRed;

            System.Windows.Media.Animation.DoubleAnimation opacityAnimation = new System.Windows.Media.Animation.DoubleAnimation();

            opacityAnimation.To = 1.0;
            opacityAnimation.Duration = TimeSpan.FromSeconds(1);
            opacityAnimation.AutoReverse = true;

            RegisterName("redBrush", redBrush);

            Storyboard sb = new System.Windows.Media.Animation.Storyboard();

            Storyboard.SetTargetName(opacityAnimation, "redBrush");
            Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath(SolidColorBrush.OpacityProperty));

            sb.Children.Add(opacityAnimation);

            object wantedNode = indicatorBounds.FindName(selectedStep);
            if (wantedNode is System.Windows.Shapes.Path){   
                System.Windows.Shapes.Path wantedChild = wantedNode as System.Windows.Shapes.Path;
                wantedChild.Fill = redBrush;
                //System.Diagnostics.Debug.WriteLine(wantedChild.Opacity);          
                sb.Begin(this);

最后，XAML：

.
.
. 
.
<Viewbox Name="forceGradientContainer"  Width="126" Height="457"
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Canvas.Left="117" Canvas.Top="17">
   <Canvas  Name="indicatorBounds" Width="126.378" Height="457.004">
        <Canvas Name="holder">
            .
            .
            .
            .
             <Path Fill="IndianRed" Opacity="0" x:Name="step0108" Data="F1 M 28.802,209.027 L     49.252,221.067 C 47.922,223.377 47.162,226.057 47.162,228.917 L 23.432,228.917 C 23.432,221.667 25.392,214.867 28.802,209.027 Z"/>`
            .
            .
            .
         </Canvas>    
     </Canvas>
</Viewbox>
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1 回答 1

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尝试

Storyboard.SetTarget(opacityAnimation, redBrush);

代替

RegisterName("redBrush", redBrush);
Storyboard.SetTargetName(opacityAnimation, "redBrush");

为什么不只是为元素本身的不透明度设置动画呢？

Storyboard.SetTarget(opacityAnimation, wantedChild);
Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath("Opacity"));
于 2013-09-24T07:06:16.990 回答