一、WPF窗體上有一個名為rectangle2的矩形

對應的XAML如下：

<Window x:Class="WpfVideo.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1" Height="434" Width="593" Loaded="Window_Loaded">
    <Grid>
        <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="29,67,0,0" Name="button2" VerticalAlignment="Top" Width="75" Click="button2_Click" />
<Rectangle Height="71" HorizontalAlignment="Left" Margin="50,207,0,0" Name="rectangle2" Stroke="Black" VerticalAlignment="Top" Width="101" Fill="#FF967878" />
        <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="162,67,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />
    </Grid>
< /Window>

二、方法一

private void button1_Click(object sender, RoutedEventArgs e)
        {
            RotateTransform rtf = new RotateTransform();
            rectangle2.RenderTransform = rtf;
            DoubleAnimation dbAscending = new DoubleAnimation(0, 360, new Duration(TimeSpan.FromSeconds(1)));
            Storyboard storyboard = new Storyboard();
            dbAscending.RepeatBehavior = RepeatBehavior.Forever;
            storyboard.Children.Add(dbAscending);
            Storyboard.SetTarget(dbAscending, rectangle2);
            Storyboard.SetTargetProperty(dbAscending, new PropertyPath("RenderTransform.Angle"));
            storyboard.Begin();
        }

三、方法二

private void button2_Click(object sender, RoutedEventArgs e)
        {
            RotateTransform rtf = new RotateTransform();
            rectangle2.RenderTransform = rtf;
            DoubleAnimation dbAscending = new DoubleAnimation(0, 360, new Duration(TimeSpan.FromSeconds(1)));
            dbAscending.RepeatBehavior = RepeatBehavior.Forever;
            rtf.BeginAnimation(RotateTransform.AngleProperty, dbAscending);
        }