如何禁用 Scrollviewer 上子控件的自动滚动

Question

我有以下相当简单的代码

  <Window ... Width=400 Height=400>
    <ScrollViewer HorizontalScrollBarVisibility="Auto"  >
        <StackPanel VerticalAlignment="Top"
                    HorizontalAlignment="Left">
            <TextBox TextWrapping="Wrap"
                     Margin="0,5,0,5"
                     Width="500"
                     Padding="20">Scrolling is enabled when it is necessary. 
                Resize the window, making it larger and smaller.</TextBox>
            <StackPanel Orientation="Horizontal">
                <Label Content="aswkognweklng"></Label>
                <TextBox TextWrapping="Wrap"
                         Margin="0,5,0,5"
                         Width="500"
                         Padding="20">Scrolling is enabled when it is necessary. 
                Resize the window, making it larger and smaller.</TextBox>
            </StackPanel>
        </StackPanel>
    </ScrollViewer>
  </Window>

我想禁用以下行为：

• 滚动条可见
• 单击第一个文本框中的文本
• 单击第二个文本框中的填充区域

=> 滚动查看器将移动滚动条，使文本框左边框与可见窗口边框对齐

我想禁用这种自动滚动行为。那可能吗？

用户交互的默认滚动行为应该仍然有效。因此，当用户与滚动条交互时，它应该正常滚动内容。

Answer 1

对的，这是可能的。ScrollViewer您只需要处理冒泡到第二个的 RequestBringIntoView 事件StackPanel。只需将其标记为已处理即可。

XAML：

<ScrollViewer HorizontalScrollBarVisibility="Auto"  >
    <StackPanel VerticalAlignment="Top"
                HorizontalAlignment="Left">
        <TextBox TextWrapping="Wrap"
                 Margin="0,5,0,5"
                 Width="500"
                 Padding="20">Scrolling is enabled when it is necessary. 
            Resize the window, making it larger and smaller.</TextBox>
        <StackPanel Orientation="Horizontal" RequestBringIntoView="StackPanel_RequestBringIntoView">
            <Label Content="aswkognweklng"></Label>
            <TextBox TextWrapping="Wrap"
                     Margin="0,5,0,5"
                     Width="500"
                     Padding="20">Scrolling is enabled when it is necessary. 
            Resize the window, making it larger and smaller.</TextBox>
        </StackPanel>
    </StackPanel>
</ScrollViewer>

C＃：

private void StackPanel_RequestBringIntoView(object sender, RequestBringIntoViewEventArgs e)
{
  e.Handled = true;
}