Question

我想要淡出FlowDocument TableRow。

var opacityAnimation = new DoubleAnimation();
   opacityAnimation.To = 0.0;
   opacityAnimation.Duration = TimeSpan.FromSeconds(1);
   Storyboard.SetTarget(opacityAnimation, row.Foreground);
   Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath(SolidColorBrush.OpacityProperty));
   var storyboard = new Storyboard();
   storyboard.Children.Add(opacityAnimation);
   storyboard.Begin();

无法制作动画＆＃39;（0）＆＃39;在不可变对象实例上。我遇到了麻烦，因为它似乎无法直接操纵不透明度，您必须更改Brush前景TableRow。

我应该以故事板为目标？

Answer 1

通过以下微小的更改，我设法为表格行设置动画：

row.Foreground = new SolidColorBrush(Colors.Black);
var opacityAnimation = new DoubleAnimation();
opacityAnimation.From = 1.0;
opacityAnimation.To = 0.0;
opacityAnimation.Duration = TimeSpan.FromSeconds(1);
Storyboard.SetTarget(opacityAnimation, row);
Storyboard.SetTargetProperty(opacityAnimation,
    new PropertyPath("(TableRow.Foreground).(Brush.Opacity)"));
var storyboard = new Storyboard();
storyboard.Children.Add(opacityAnimation);
storyboard.Begin();

必须新创建前景画笔，使其不被冻结（=不可动画）;看第一行代码。此外，目标属性路径必须为"(TableRow.Foreground).(Brush.Opacity)"，目标必须是行本身，而不是row.Foreground。

在代码后面的FlowDocument TableRow的不透明度

1 个答案: