在这里使用了为 TreeViewItems 设置全行选择的方法： Lee Campbell Horizontal stretch for treeviewitems
这适用于顶级项目。
但是TreeViewItem.Items
集合好像有问题，好像没有取到正确的模板。（我看到它不在TreeView.Items集合中，如模板所示）
有没有一种简单的方法可以从父项样式派生子项样式？
我怎样才能描述一次样式（对于所有 TreeviewItems）并让样式用于所有 TreeViewItems，无论它们是在集合中TreeView.Items还是在TreeViewItem.Items集合中？
这是我的 XAML，一些代码来自 LeeCampbell 示例。
<Window x:Class="TreeViewFullRow.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TreeViewFullRow"
Title="MainWindow"
Width="525"
Height="350">
<Window.Resources />
<Grid>
<TreeView Name="TreeData"
Width="236"
Height="311"
HorizontalAlignment="Left"
VerticalAlignment="Top">
<TreeView.ItemContainerStyle>
<Style BasedOn="{StaticResource {x:Type TreeViewItem}}" TargetType="TreeViewItem">
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeViewItem">
<StackPanel>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" MinWidth="19" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<!--
Note that the following do not work, but I believe the top 2 should?!
<ToggleButton IsChecked="{TemplateBinding IsExpanded}" ClickMode="Press" Name="Expander">
<ToggleButton IsChecked="{TemplateBinding Property=IsExpanded}" ClickMode="Press" Name="Expander">
<ToggleButton IsChecked="{TemplateBinding Path=IsExpanded}" ClickMode="Press" Name="Expander">
-->
<ToggleButton Name="Expander"
ClickMode="Press"
IsChecked="{Binding Path=IsExpanded,
RelativeSource={RelativeSource TemplatedParent}}">
<ToggleButton.Style>
<Style TargetType="ToggleButton">
<Setter Property="UIElement.Focusable" Value="false" />
<Setter Property="FrameworkElement.Width" Value="16" />
<Setter Property="FrameworkElement.Height" Value="16" />
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Border Width="16"
Height="16"
Background="#00FFFFFF"
Padding="5,5,5,5">
<Path Name="ExpandPath"
Fill="#00FFFFFF"
Stroke="#FF989898">
<Path.Data>
<PathGeometry Figures="M0,0L0,6L6,0z" />
</Path.Data>
<Path.RenderTransform>
<RotateTransform Angle="135" CenterX="3" CenterY="3" />
</Path.RenderTransform>
</Path>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="UIElement.IsMouseOver" Value="True">
<Setter TargetName="ExpandPath" Property="Shape.Stroke" Value="#FF1BBBFA" />
<Setter TargetName="ExpandPath" Property="Shape.Fill" Value="#00FFFFFF" />
</Trigger>
<Trigger Property="ToggleButton.IsChecked" Value="True">
<Setter TargetName="ExpandPath" Property="UIElement.RenderTransform">
<Setter.Value>
<RotateTransform Angle="180" CenterX="3" CenterY="3" />
</Setter.Value>
</Setter>
<Setter TargetName="ExpandPath" Property="Shape.Fill" Value="#FF595959" />
<Setter TargetName="ExpandPath" Property="Shape.Stroke" Value="#FF262626" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ToggleButton.Style>
</ToggleButton>
<Border x:Name="Bd"
Grid.Column="1"
HorizontalAlignment="Stretch"
Background="{TemplateBinding Panel.Background}"
BorderBrush="{TemplateBinding Border.BorderBrush}"
BorderThickness="{TemplateBinding Border.BorderThickness}"
Padding="{TemplateBinding Control.Padding}"
SnapsToDevicePixels="True">
<ContentPresenter x:Name="PART_Header"
HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}"
Content="{TemplateBinding HeaderedContentControl.Header}"
ContentSource="Header"
ContentStringFormat="{TemplateBinding HeaderedItemsControl.HeaderStringFormat}"
ContentTemplate="{TemplateBinding HeaderedContentControl.HeaderTemplate}"
ContentTemplateSelector="{TemplateBinding HeaderedItemsControl.HeaderTemplateSelector}"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
</Border>
<ItemsPresenter x:Name="ItemsHost"
Grid.Row="1"
Grid.Column="1" />
</Grid>
</StackPanel>
<ControlTemplate.Triggers>
<Trigger Property="TreeViewItem.IsExpanded" Value="False">
<Setter TargetName="ItemsHost" Property="UIElement.Visibility" Value="Collapsed" />
</Trigger>
<Trigger Property="ItemsControl.HasItems" Value="False">
<Setter TargetName="Expander" Property="UIElement.Visibility" Value="Hidden" />
</Trigger>
<Trigger Property="TreeViewItem.IsSelected" Value="True">
<Setter TargetName="Bd" Property="Panel.Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
<Setter Property="TextElement.Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="TreeViewItem.IsSelected" Value="True" />
<Condition Property="Selector.IsSelectionActive" Value="False" />
</MultiTrigger.Conditions>
<Setter TargetName="Bd" Property="Panel.Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
<Setter Property="TextElement.Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
</MultiTrigger>
<Trigger Property="UIElement.IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</TreeView.ItemContainerStyle>
</TreeView>
<Button Name="BtnLoad"
Width="75"
Height="23"
Margin="277,12,0,0"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Click="OnBtnLoad"
Content="Load data" />
</Grid>
</Window>
这很容易。在按钮单击处理程序中，我将新项目添加到 TreeView。这是代码：
private void OnBtnLoad(object sender, RoutedEventArgs e)
{
var count = this.TreeData.Items.Count.ToString();
var parent = new TreeViewItem() { Name = "Name_" + count, Header = "Header_" + count };
this.TreeData.Items.Add(parent);
var child0 = new TreeViewItem() { Name = "Name_" + count + "_0", Header = "Header_" + count + "_0" };
var child1 = new TreeViewItem() { Name = "Name_" + count + "_1", Header = "Header_" + count + "_1" };
var child2 = new TreeViewItem() { Name = "Name_" + count + "_2", Header = "Header_" + count + "_2" };
parent.Items.Add(child0);
parent.Items.Add(child1);
parent.Items.Add(child2);
parent.Items.Refresh();
}