像这样的东西应该可以解决问题。
您可以将 a 添加Canvas到StackPanel2TextBlocks一个设置到位置 0 和一个设置到 的ActualWidth，StackPanel然后当第一个文本块离开屏幕时，另一个块将进入视图。
我使用的原因Canvas是因为Canvas是唯一真正支持ClipToBounds="false"这一点的元素允许第二个TextBlock可见，即使它位于自身的边界Canvas之外
IValueConverter如果要从右向左滚动，我们还需要 a来获得正确的负值。
我还添加了事件触发器，SizeChanged因此如果调整窗口大小，动画值将正确更新。
代码：
namespace WpfApplication9
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
}
public class NegatingConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is double)
{
return -((double)value);
}
return value;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is double)
{
return +(double)value;
}
return value;
}
}
}
xml:
<Window x:Class="WpfApplication9.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication9"
Title="MainWindow" Height="83" Width="222" Name="UI" Tag="Tol Level">
<StackPanel Orientation="Horizontal" x:Name="stack">
<StackPanel.Resources>
<local:NegatingConverter x:Key="NegatingConverter" />
<Storyboard x:Key="slide">
<DoubleAnimation From="0" To="{Binding Width, ElementName=canvas, Converter={StaticResource NegatingConverter}}" Duration="00:00:10"
Storyboard.TargetProperty="X"
Storyboard.TargetName="transferCurreny"
RepeatBehavior="Forever"/>
</Storyboard>
</StackPanel.Resources>
<StackPanel.RenderTransform>
<TranslateTransform x:Name="transferCurreny" X="0"/>
</StackPanel.RenderTransform>
<StackPanel.Triggers>
<EventTrigger RoutedEvent="StackPanel.Loaded">
<BeginStoryboard Storyboard="{StaticResource slide}" />
</EventTrigger>
<EventTrigger RoutedEvent="StackPanel.SizeChanged">
<BeginStoryboard Storyboard="{StaticResource slide}" />
</EventTrigger>
</StackPanel.Triggers>
<Canvas x:Name="canvas" Width="{Binding ActualWidth, ElementName=stack}">
<TextBlock Text="StackOverflow" FontSize="25" x:Name="txtKron" Canvas.Left="0"/>
<TextBlock Text="{Binding Text, ElementName=txtKron}" FontSize="25" Canvas.Left="{Binding Width, ElementName=canvas}"/>
</Canvas>
</StackPanel>
</Window>
结果：
编辑：从左到右
<StackPanel Orientation="Horizontal" x:Name="stack">
<StackPanel.Resources>
<local:NegatingConverter x:Key="NegatingConverter" />
<Storyboard x:Key="slide">
<DoubleAnimation From="0" To="{Binding Width, ElementName=canvas}" Duration="00:00:10"
Storyboard.TargetProperty="X"
Storyboard.TargetName="transferCurreny"
RepeatBehavior="Forever"/>
</Storyboard>
</StackPanel.Resources>
<StackPanel.RenderTransform>
<TranslateTransform x:Name="transferCurreny" X="0"/>
</StackPanel.RenderTransform>
<StackPanel.Triggers>
<EventTrigger RoutedEvent="StackPanel.Loaded">
<BeginStoryboard Storyboard="{StaticResource slide}" />
</EventTrigger>
<EventTrigger RoutedEvent="StackPanel.SizeChanged">
<BeginStoryboard Storyboard="{StaticResource slide}" />
</EventTrigger>
</StackPanel.Triggers>
<Canvas x:Name="canvas" Width="{Binding ActualWidth, ElementName=stack}">
<TextBlock Text="StackOverflow" FontSize="25" x:Name="txtKron" Canvas.Left="0"/>
<TextBlock Text="{Binding Text, ElementName=txtKron}" FontSize="25" Canvas.Left="{Binding Width, ElementName=canvas, Converter={StaticResource NegatingConverter}}"/>
</Canvas>
</StackPanel>
