路径动画：一个东西沿着你画的的线跑。
微软对这个有很详细的说明，有需要请参照微软Learn网站

cs的代码

PathGeometry pathGeometry = new PathGeometry();

            PathFigure pathFigure = new PathFigure();
            //pathFigure.IsClosed = true;
            pathFigure.StartPoint = new Point(300, 200);

            LineSegment lineSegment = new LineSegment();
            lineSegment.Point = new Point(300, 400);
            pathFigure.Segments.Add(lineSegment);
            lineSegment = new LineSegment();
            lineSegment.Point = new Point(700, 400);
            pathFigure.Segments.Add(lineSegment);
            lineSegment = new LineSegment();
            lineSegment.Point = new Point(700, 700);
            pathFigure.Segments.Add(lineSegment);;
            pathFigure.Segments.Add(lineSegment);

            PathFigureCollection pathFigures = new PathFigureCollection();
            pathFigures.Add(pathFigure);

            pathGeometry.Figures.Add(pathFigure);

            pathGeometry.Freeze();

            System.Windows.Shapes.Path path = new System.Windows.Shapes.Path();
            path.Data = pathGeometry;
            path.Stroke = Brushes.Green;
            path.StrokeThickness = 5;

            canvas2.Children.Add(path);

            MatrixAnimationUsingPath matrixAnimationUsingPath = new MatrixAnimationUsingPath();
            matrixAnimationUsingPath.PathGeometry = pathGeometry;
            matrixAnimationUsingPath.Duration = TimeSpan.FromSeconds(5);
            matrixAnimationUsingPath.RepeatBehavior = RepeatBehavior.Forever;
            matrixAnimationUsingPath.DoesRotateWithTangent = true;

            Storyboard.SetTargetName(matrixAnimationUsingPath, "ButtonMatrixTransform2");
            Storyboard.SetTargetProperty(matrixAnimationUsingPath, new PropertyPath(MatrixTransform.MatrixProperty));

            Storyboard pathAnimationStoryboard = new Storyboard();
            pathAnimationStoryboard.Children.Add(matrixAnimationUsingPath);
            pathAnimationStoryboard.Begin(this);

这里是xaml的内容

<Window x:Class="WPF_Test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPF_Test"
        xmlns:control="clr-namespace:WPF_Test.Combox"
        mc:Ignorable="d"
        Title="MainWindow" Height="800" Width="1200" Loaded="Window_Loaded">
    <Grid>
        <Canvas x:Name="canvasMain">
            <Button Content="123" Foreground="Black" x:Name="machineHand" Background="Gold" HorizontalAlignment="Left" 
                                            VerticalAlignment="Top" Width="80" Height="73" Canvas.Left="14" Canvas.Top="301" Margin="30,67,0,0">
                <Button.RenderTransform>
                    <TranslateTransform x:Name="machineAnimation"/>
                </Button.RenderTransform>
            </Button>
            <Button  Content="Button" Click="Button_Click" HorizontalAlignment="Left" Height="45" Margin="30,275,0,0" VerticalAlignment="Top" Width="135"/>
            <Label Content="Label" x:Name="label01" FontSize="16px" HorizontalAlignment="Left" Margin="160,87,0,0" VerticalAlignment="Top" Width="225" RenderTransformOrigin="0.754,-0.658"/>
            <Button Content="Button" Click="Button_Click_1" Canvas.Top="530" Width="195" HorizontalAlignment="Center" Height="50" VerticalAlignment="Top"/>
            <Button Content="Button" Click="Button_Click_2" Canvas.Top="615" Width="195" Height="50" HorizontalAlignment="Left" VerticalAlignment="Top"/>
            <Button Content="Button" Click="Button_Click_3" Canvas.Top="695" Width="195" Height="50" HorizontalAlignment="Center" VerticalAlignment="Top"/>
            <Canvas x:Name="canvas2">
                <Canvas.Resources>
                    <PathGeometry x:Key="path">
                        <PathGeometry.Figures>
                            <PathFigureCollection>
                                <PathFigure IsClosed="True" StartPoint="50,100">
                                    <PathFigure.Segments>
                                        <PathSegmentCollection>
                                            <LineSegment Point="100,500" />
                                            <LineSegment Point="500,50" />
                                        </PathSegmentCollection>
                                    </PathFigure.Segments>
                                </PathFigure>
                            </PathFigureCollection>
                        </PathGeometry.Figures>
                    </PathGeometry>
                    <Storyboard x:Key="pathStoryboard" >
                        <MatrixAnimationUsingPath PathGeometry="{StaticResource path}"
                                          Storyboard.TargetName="ButtonMatrixTransform"
                                          Storyboard.TargetProperty="Matrix"
                                          DoesRotateWithTangent="True"
                                          Duration="0:0:10" RepeatBehavior="Forever" >
                        </MatrixAnimationUsingPath>
                    </Storyboard>
                </Canvas.Resources>

                <Canvas.Triggers>
                    <EventTrigger RoutedEvent="Control.Loaded">
                        <BeginStoryboard Storyboard="{StaticResource pathStoryboard}" />
                    </EventTrigger>
                </Canvas.Triggers>

                <Path Data="{StaticResource path}" Stroke="Black" StrokeThickness="5" />

                <Button Width="50" Height="20" Background="Yellow">
                    <Button.RenderTransform>
                        <MatrixTransform x:Name="ButtonMatrixTransform" />
                    </Button.RenderTransform>
                </Button>

                <Button x:Name="aButton" Content=">>>" FontSize="50" BorderThickness="0" Width="110" Height="50" Background="Transparent" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="35" Canvas.Top="-35">
                    <Button.RenderTransform>
                        <MatrixTransform x:Name="ButtonMatrixTransform2" />
                    </Button.RenderTransform>
                </Button>
            </Canvas>

        </Canvas>

    </Grid>
</Window>