WPF TreeView 禁用子项选择

我正在寻找一种方法来禁用 WPF TreeView 的内置操作。在 WPF 中，当您选择 TreeView 的父节点时，它也会选择该组中的所有子节点。我不要这个。我想要的是一个单一的选择。这是一张显示当前正在发生的事情的图像：

同样，我想要的是只选择单行。

这是我目前使用的 XAML：

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style x:Key="VoidwalkerTreeView" TargetType="{x:Type TreeView}">
        <Setter Property="OverridesDefaultStyle" Value="True" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="TreeView">
                    <Border
                        Name="Border"
                        Background="{DynamicResource Voidwalker_Brush_ContextArea}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}">
                        <ScrollViewer
                            Padding="4"
                            CanContentScroll="False"
                            Focusable="False">
                            <ItemsPresenter />
                        </ScrollViewer>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
        <Setter Property="Focusable" Value="False" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ToggleButton">
                    <Grid
                        Width="15"
                        Height="13"
                        Background="Transparent">
                        <Path
                            x:Name="Collapsed"
                            Margin="1,1,1,1"
                            HorizontalAlignment="Left"
                            VerticalAlignment="Center"
                            Data="M 4 0 L 8 4 L 4 8 Z"
                            Fill="{DynamicResource Voidwalker_Brush_ActiveTextForeground}" />
                        <Path
                            x:Name="Expanded"
                            Margin="1,1,1,1"
                            HorizontalAlignment="Left"
                            VerticalAlignment="Center"
                            Data="M 0 4 L 8 4 L 4 8 Z"
                            Fill="{DynamicResource Voidwalker_Brush_ActiveTextForeground}"
                            Visibility="Hidden" />
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CheckStates">
                                <VisualState x:Name="Checked">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Collapsed" Storyboard.TargetProperty="(UIElement.Visibility)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Hidden}" />
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Expanded" Storyboard.TargetProperty="(UIElement.Visibility)">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Unchecked" />
                                <VisualState x:Name="Indeterminate" />
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="TreeViewItemFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Border>
                        <Rectangle
                            Margin="0,0,0,0"
                            Opacity="0"
                            Stroke="Black"
                            StrokeDashArray="1 2"
                            StrokeThickness="5" />
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>


    <Style x:Key="{x:Type TreeViewItem}" TargetType="{x:Type TreeViewItem}">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="HorizontalContentAlignment" Value="{Binding Path=HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="VerticalContentAlignment" Value="{Binding Path=VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="Padding" Value="1,0,0,0" />
        <Setter Property="Foreground" Value="{DynamicResource Voidwalker_Brush_ActiveTextForeground}" />
        <Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TreeViewItem}">
                    <Grid x:Name="itemGrid">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" MinWidth="19" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition />
                        </Grid.RowDefinitions>
                        <ToggleButton
                            x:Name="Expander"
                            ClickMode="Press"
                            IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
                            Style="{StaticResource ExpandCollapseToggleStyle}" />
                        <Border
                            x:Name="Bd"
                            Grid.Column="1"
                            Padding="{TemplateBinding Padding}"
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            SnapsToDevicePixels="true">
                            <ContentPresenter
                                x:Name="PART_Header"
                                HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                ContentSource="Header"
                                SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        </Border>
                        <ItemsPresenter
                            x:Name="ItemsHost"
                            Grid.Row="1"
                            Grid.Column="1"
                            Grid.ColumnSpan="2" />
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsExpanded" Value="false">
                            <Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed" />
                        </Trigger>
                        <Trigger Property="HasItems" Value="false">
                            <Setter TargetName="Expander" Property="Visibility" Value="Hidden" />
                        </Trigger>
                        <Trigger Property="IsSelected" Value="true">
                            <Setter TargetName="itemGrid" Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="true" />
                                <Condition Property="IsSelectionActive" Value="false" />
                            </MultiTrigger.Conditions>
                            <Setter TargetName="itemGrid" Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
                        </MultiTrigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

有谁知道如何更改此 XAML，或者为我指明如何仅允许单行选择的正确方向？所需行为的一个很好的例子是 Visual Studio 如何处理它的解决方案树视图。你只能做单选，除非你故意按住shift什么的。