Question

I have a button named “b”, which background I want to change from black to white, but it doesn’t work.

The error:

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

My code:

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()

Have any ideas?

Answer 1

Background is of type Brush which cannot be animated with a ColorAnimaion. However, SolidColorBrush has a Color property, so you can do something like:

Storyboard.SetTargetProperty(changeColor, new PropertyPath("Background.Color"));