wpf 中用 C# 代码创建 PropertyPath ,以对间接目标进行 Storyboard 动画.

 1 Window
 2     x:Class="WpfApp1.MainWindow"
 3     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 4     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 5     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 6     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 7     Title="MainWindow"
 8     Width="400"
 9     Height="250"
10     mc:Ignorable="d">
11     Grid>
12         Grid.RowDefinitions>
13             RowDefinition />
14             RowDefinition />
15         Grid.RowDefinitions>
16 
17         
18         
19         
20         
21         Rectangle
22             x:Name="TheRectangle"
23             Width="150"
24             Height="50"
25             Fill="Aqua" />
26 
27         Button
28             Grid.Row="1"
29             Width="150"
30             Height="50"
31             Click="ButtonBase_OnClick">
32             开始动画
33         Button>
34     Grid>
35 Window>

 1 using System;
 2 using System.Windows;
 3 using System.Windows.Media;
 4 using System.Windows.Media.Animation;
 5 using System.Windows.Shapes;
 6 
 7 namespace WpfApp1
 8 {
 9     /// 

10     /// MainWindow.xaml 的交互逻辑
11     /// 
12     public partial class MainWindow
13     {
14         public MainWindow()
15         {
16             InitializeComponent();
17         }
18 
19         private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
20         {
21             //创建颜色动画对象.
22             var colorAnimation = new ColorAnimation(
23                 Colors.Aqua,        //颜色起始值
24                 Colors.BlueViolet,      //颜色中值值
25                 new Duration(new TimeSpan(0, 0, 2))     //动画持续时间,2秒
26                 );
27 
28             //创建属性链.
29             //动画的目标属性是一个 Shape.Fill 属性的 Color 子属性.
30             var propertyChain = new[]
31             {
32                 Shape.FillProperty,
33                 SolidColorBrush.ColorProperty
34             };
35 
36             //通过属性链创建 PropertyPath 对象.
37             var propertyPath = new PropertyPath("(0).(1)", propertyChain);
38 
39             //通过 PropertyPath 对象指定动画的目标属性.
40             Storyboard.SetTargetProperty(colorAnimation, propertyPath);
41 
42             //指定动画的目标对象
43             Storyboard.SetTargetName(colorAnimation, "TheRectangle");
44 
45             //创建故事版,将动画包含其中,并启动动画
46             var storyboard = new Storyboard();
47             storyboard.Children.Add(colorAnimation);
48             storyboard.Begin(this);
49         }
50     }
51 }