c# - WPF:TreeView 或 TreeListView header 水平滚动问题

Question

我从 here 下载了 TreeListView .裁剪数据时不显示水平或垂直滚动​​条。像这样

所以我把它的样式改成了

<Style TargetType="{x:Type l:TreeListView}">
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility"
            Value="Auto" />
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility"
            Value="Auto" />
    <Setter Property="VerticalContentAlignment"
            Value="Center" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type l:TreeListView}">
                <Border BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}">
                    <DockPanel>
                        <GridViewHeaderRowPresenter Columns="{StaticResource gvcc}"
                                                    DockPanel.Dock="Top" />
                        <ScrollViewer x:Name="_tv_scrollviewer_"
                                      Background="{TemplateBinding Background}"
                                      CanContentScroll="False"
                                      Focusable="True"
                                      HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
                                      Padding="{TemplateBinding Padding}"
                                      SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                      VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
                            <ItemsPresenter />
                        </ScrollViewer>
                    </DockPanel>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="VirtualizingStackPanel.IsVirtualizing"
                             Value="true">
                        <Setter Property="CanContentScroll"
                                TargetName="_tv_scrollviewer_"
                                Value="true" />
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

垂直滚动条很好。但问题是 Horizo​​ntal Scolbar。当数据被水平裁剪并且滚动条向右移动时，数据向右移动但标题保持在原处。像这样。

如何解决水平滚动 treeitem 时标题随之移动的问题。我不允许将标题放在 scrollviewer 中，因为当数据垂直滚动时它们需要可见。

Answer 1

如果您希望整个 TreeView (包括标题)水平滚动，另外添加一个 scrolviewer，如下所示:

<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled" >
    <Treeview/>
</ScrollViewer>