WPF备忘录五（路径动画）

<Grid>
<Path x:Name="path1" Stroke="Red">
<Path.Data>
<EllipseGeometry x:Name="eg" Center="200 120" RadiusX="120" RadiusY="80"></EllipseGeometry>
</Path.Data>
</Path>
<Ellipse Height="33" Stroke="Blue" Fill="Blue" HorizontalAlignment="Left" Margin="0,0,0,0" Name="ellipse1" VerticalAlignment="Top" Width="36">
<Ellipse.RenderTransform>
<TransformGroup>
<MatrixTransform x:Name="mt1"></MatrixTransform>
<TranslateTransform X="-15" Y="-15"></TranslateTransform>
</TransformGroup>

</Ellipse.RenderTransform>
<Ellipse.Triggers>
<EventTrigger RoutedEvent="Page.Loaded">
<BeginStoryboard>
<Storyboard x:Name="sb">
<MatrixAnimationUsingPath x:Name="ma"  Storyboard.TargetName="mt1" Storyboard.TargetProperty="Matrix" Duration="0:0:10"></MatrixAnimationUsingPath>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Ellipse.Triggers>
</Ellipse>
<Button Content="开始路径动画" Height="23" HorizontalAlignment="Left" Margin="418,61,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />
</Grid>

public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}

private void button1_Click(object sender, RoutedEventArgs e)
{
PathGeometry pg = new PathGeometry();
pg.AddGeometry(eg);
this.ma.PathGeometry = pg;
sb.RepeatBehavior = RepeatBehavior.Forever;
sb.Begin(ellipse1);
}
}