C# 允许外部滚动查看器在内部水平滚动滚动查看器中进行垂直滚动

当您在ScrollViewer中有ScrollViewer时，使用滚轮的滚动仅限于内部滚轮。当他们有相同的“方向”时，这是有道理的。但是当外部只允许垂直滚动，而内部只允许水平滚动时，我希望使用内部的鼠标滚轮在外部ScrollViewer中垂直滚动。没有。有没有办法让它做到这一点

在以下代码中，尝试在红色字母区域内使用滚轮：

<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
    <StackPanel>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>
        <TextBlock>aaaaaaaaaaaaaaaaaa</TextBlock>

        <ScrollViewer VerticalScrollBarVisibility="Disabled" HorizontalScrollBarVisibility="Auto">
            <StackPanel >
                <TextBlock Foreground="Red">aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccc dddddddddddddddddddddd eeeeeeeeeeeeeeeeeeeee fffffffffffffffff ggggggggggggggggggggggg</TextBlock>
                <TextBlock Foreground="Red">aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccc dddddddddddddddddddddd eeeeeeeeeeeeeeeeeeeee fffffffffffffffff ggggggggggggggggggggggg</TextBlock>
                <TextBlock Foreground="Red">aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccc dddddddddddddddddddddd eeeeeeeeeeeeeeeeeeeee fffffffffffffffff ggggggggggggggggggggggg</TextBlock>
                <TextBlock Foreground="Red">aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccc dddddddddddddddddddddd eeeeeeeeeeeeeeeeeeeee fffffffffffffffff ggggggggggggggggggggggg</TextBlock>
            </StackPanel>
        </ScrollViewer>
    </StackPanel>
</ScrollViewer>

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccddddddddddddddddddddeeeeeeeeeeeeeeeeeeeeeeeeeeeeeefffffffffffff ggggggggggggggggggggggggggg
aaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccddddddddddddddddddddeeeeeeeeeeeeeeeeeeeeeeeeeeeeeefffffffffffff ggggggggggggggggggggggggggg
aaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccddddddddddddddddddddeeeeeeeeeeeeeeeeeeeeeeeeeeeeeefffffffffffff ggggggggggggggggggggggggggg
aaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccddddddddddddddddddddeeeeeeeeeeeeeeeeeeeeeeeeeeeeeefffffffffffff ggggggggggggggggggggggggggg

如果可以使用代码隐藏，则可以为“child”

ScollViewer

的

PreviewMouseWheel

事件创建事件处理程序，并且在事件处理程序中，可以将

MouseWheelEventArgs

信息传递给“父级”

ScrollViewer

来引发它自己的

MouseWheel

事件

首先，XAML将有几个小改动：

为“父项”

ScrollViewer

指定一个名称，以便可以从代码隐藏中引用它：

<ScrollViewer x:Name="parentScrollViewer"
              VerticalScrollBarVisibility="Auto"
              HorizontalScrollBarVisibility="Disabled">

最后，在事件处理程序中实现代码以引发“parent”

mouseweel

事件：

private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
    var mouseWheelEventArgs = new MouseWheelEventArgs(e.MouseDevice, e.Timestamp, e.Delta);
    mouseWheelEventArgs.RoutedEvent = ScrollViewer.MouseWheelEvent;
    mouseWheelEventArgs.Source = sender;
    this.parentScrollViewer.RaiseEvent(mouseWheelEventArgs);
}

private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
    var mouseWheelEventArgs = new MouseWheelEventArgs(e.MouseDevice, e.Timestamp, e.Delta);
    mouseWheelEventArgs.RoutedEvent = ScrollViewer.MouseWheelEvent;
    mouseWheelEventArgs.Source = sender;
    this.parentScrollViewer.RaiseEvent(mouseWheelEventArgs);
}