WPF TextBlock 自动滚动动画

可以使用以下代码实现 WPF TextBlock 的自动滚动动画：

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <ScrollViewer VerticalScrollBarVisibility="Auto">
            <StackPanel x:Name="stackPanel">
                <TextBlock Text="This is line 1" />
                <TextBlock Text="This is line 2" />
                <TextBlock Text="This is line 3" />
                <TextBlock Text="This is line 4" />
                <TextBlock Text="This is line 5" />
                <TextBlock Text="This is line 6" />
                <TextBlock Text="This is line 7" />
                <TextBlock Text="This is line 8" />
                <TextBlock Text="This is line 9" />
                <TextBlock Text="This is line 10" />
            </StackPanel>
        </ScrollViewer>
    </Grid>
</Window>

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Animation;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            // Start the animation when the window is loaded
            Loaded += (sender, e) =>
            {
                var storyboard = new Storyboard();
                var animation = new DoubleAnimation
                {
                    From = 0,
                    To = stackPanel.ActualHeight - scrollViewer.ActualHeight,
                    Duration = new Duration(new System.TimeSpan(0, 0, 5)),
                    RepeatBehavior = RepeatBehavior.Forever
                };
                Storyboard.SetTarget(animation, scrollViewer);
                Storyboard.SetTargetProperty(animation, new PropertyPath(ScrollViewer.VerticalOffsetProperty));
                storyboard.Children.Add(animation);
                storyboard.Begin();
            };
        }
    }
}

这段代码会在窗口加载时启动一个动画，使得 TextBlock 中的内容自动向上滚动。