.net - 彩色动画不起作用

Question

我有一个名为“b”的按钮，我想将其背景从黑色更改为白色，但它不起作用。

错误:

'System.Windows.Media.Animation.ColorAnimation' animation object cannot be used to animate property 'Background' because it is of incompatible type 'System.Windows.Media.Brush'.

我的代码:

Dim changeColor As New Animation.ColorAnimation

changeColor.From = Colors.Black
changeColor.To = Colors.White
changeColor.Duration = TimeSpan.FromSeconds(0.2)

Animation.Storyboard.SetTarget(changeColor, b)
Animation.Storyboard.SetTargetProperty(changeColor, New PropertyPath(BackgroundProperty))

Dim sb As New Animation.Storyboard
sb.Children.Add(changeColor)
sb.Begin()

有什么想法吗？

Answer 1

值得注意的是，可以使用以下形式的表达式在 XAML 中解决相同的问题:

<ColorAnimation Duration="0:0:0.2" From="Black" To="White"
      Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"
      Storyboard.TargetName="Body" />