c# - WPF：我可以在代码中为 Grid.Background 设置动画吗？

Question

我的代码是这样的。我想动态创建网格。创造就是成功，但我无法为它的颜色设置动画。我的错误是什么？

        Grid[] grid = new Grid[99];
        for (int i = 0; i < 10; i++) {
            grid[i] = new Grid();
            grid[i].Width = grid[i].Height = 100;
            grid[i].Background = Brushes.WhiteSmoke;

            Storyboard sb = new Storyboard();
            ColorAnimation ca = new ColorAnimation(Colors.DarkTurquoise, TimeSpan.FromMilliseconds(250));
            Storyboard.SetTarget(ca, grid[i]);
            Storyboard.SetTargetProperty(ca, new PropertyPath("Fill.Color"));
            sb.Children.Add(ca);
            grid[i].MouseEnter += delegate(object sender2, MouseEventArgs e2) {
                sb.Begin(this);
            };

            stackMain.Children.Add(grid[i]);
        }

Answer 1

WPFGrid没有Fill您必须使用的属性Background

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

Answer 2

除了 sa_ddam 所说的之外，您还必须创建一个画笔，因为无法为内置画笔（如Brushes.WhiteSmoke您的示例中的示例）设置动画。

grid[i].Background = new SolidColorBrush(Colors.WhiteSmoke);
...

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

---

如果您省略情节提要并直接运行动画，它也可能会节省一些代码：

var brush = new SolidColorBrush(Colors.WhiteSmoke);
grid[i].Background = brush;

var ca = new ColorAnimation(Colors.DarkTurquoise, TimeSpan.FromMilliseconds(250));

grid[i].MouseEnter +=
    (o, e) => brush.BeginAnimation(SolidColorBrush.ColorProperty, ca);