【WPF】WPF TreeView 右对齐

StretchTreeViewItemStyle：

 <Style x:Key="TreeViewItemFocusVisual">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Rectangle/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <PathGeometry x:Key="TreeArrow" Figures="M0,0 L0,6 L6,0 z"/>
        <Style x:Key="ExpandCollapseToggleStyle" TargetType="{x:Type ToggleButton}">
            <Setter Property="Focusable" Value="False"/>
            <Setter Property="Width" Value="16"/>
            <Setter Property="Height" Value="16"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ToggleButton}">
                        <Border Background="Transparent" Height="16" Padding="5,5,5,5" Width="16">
                            <Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="Transparent" Stroke="#FF989898">
                                <Path.RenderTransform>
                                    <RotateTransform Angle="135" CenterY="3" CenterX="3"/>
                                </Path.RenderTransform>
                            </Path>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="#FF1BBBFA"/>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="Transparent"/>
                            </Trigger>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="RenderTransform" TargetName="ExpandPath">
                                    <Setter.Value>
                                        <RotateTransform Angle="180" CenterY="3" CenterX="3"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="#FF595959"/>
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="#FF262626"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="StretchTreeViewItemStyle" TargetType="{x:Type TreeViewItem}" >
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
            <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="Padding" Value="1,0,0,0"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TreeViewItem}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition MinWidth="19" Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
 　　　　　　　　　　　　　　　　<!-- Connecting Lines -->


                            <ToggleButton x:Name="Expander" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ExpandCollapseToggleStyle}"/>
                            <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                                <ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                            </Border>
                            <ItemsPresenter x:Name="ItemsHost" Grid.Column="1" Grid.Row="1"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsExpanded" Value="false">
                                <Setter Property="Visibility" TargetName="ItemsHost" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="HasItems" Value="false">
                                <Setter Property="Visibility" TargetName="Expander" Value="Hidden"/>
                            </Trigger>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter Property="Background" TargetName="Bd" 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 Property="Background" TargetName="Bd" 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.Triggers>
                <Trigger Property="VirtualizingStackPanel.IsVirtualizing" Value="true">
                    <Setter Property="ItemsPanel">
                        <Setter.Value>
                            <ItemsPanelTemplate>
                                <VirtualizingStackPanel/>
                            </ItemsPanelTemplate>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>
    

另外给一个按钮的样式（加减号的），替换即可用：

  <!-- Toggle Button -->
        <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
            <Setter Property="Focusable" Value="False"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ToggleButton">
                        <Grid Width="15" Height="13" SnapsToDevicePixels="True">
                            <Rectangle Width="9" Height="9" Stroke="#919191" SnapsToDevicePixels="true">
                                <Rectangle.Fill>
                                    <LinearGradientBrush EndPoint="0.5,2" StartPoint="0.5,0">
                                        <GradientStop Color="White" Offset="0"/>
                                        <GradientStop Color="Silver" Offset="0.5"/>
                                        <GradientStop Color="LightGray" Offset="1"/>
                                    </LinearGradientBrush>
                                </Rectangle.Fill>
                            </Rectangle>
                            <Rectangle x:Name="ExpandPath" Width="1" Height="5" Stroke="Black" SnapsToDevicePixels="true"/>
                            <Rectangle Width="5" Height="1" Stroke="Black" SnapsToDevicePixels="true"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="Visibility"  TargetName="ExpandPath" Value="Collapsed"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

<!-- Toggle Button -->
        <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
            <Setter Property="Focusable" Value="False"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ToggleButton">
                        <Grid Width="15" Height="15" SnapsToDevicePixels="True">
                            <Rectangle Width="13" Height="13" Stroke="#919191" SnapsToDevicePixels="true">
                                <Rectangle.Fill>
                                    <LinearGradientBrush EndPoint="0.5,2" StartPoint="0.5,0">
                                        <GradientStop Color="White" Offset="0"/>
                                        <GradientStop Color="Silver" Offset="0.5"/>
                                        <GradientStop Color="LightGray" Offset="1"/>
                                    </LinearGradientBrush>
                                </Rectangle.Fill>
                            </Rectangle>
                            <Rectangle x:Name="ExpandPath" Width="1" Height="7" Stroke="Gray" SnapsToDevicePixels="true"/>
                            <Rectangle Width="7" Height="1" Stroke="Gray" SnapsToDevicePixels="true"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="Visibility"  TargetName="ExpandPath" Value="Collapsed"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

 加号，还需要一个转换器：

class TreeViewLineConverter : IMultiValueConverter
    {


        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            double height = (double)values[0];

            TreeViewItem item = values[2] as TreeViewItem;
            ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);
            bool isLastOne = ic.ItemContainerGenerator.IndexFromContainer(item) == ic.Items.Count - 1;

            Rectangle rectangle = values[3] as Rectangle;
            if (isLastOne)
            {
                rectangle.VerticalAlignment = VerticalAlignment.Top;
                return 9.0;
            }
            else
            {
                rectangle.VerticalAlignment = VerticalAlignment.Stretch;
                return double.NaN;
            }


        }



        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

 添加行头的虚线：

在　<!-- Connecting Lines --> 下方位置添加：

<!-- Connecting Lines -->
<Rectangle x:Name="HorLn" Margin="9,-1,0,0" Height="1" Stroke="#DCDCDC" SnapsToDevicePixels="True"/>
<Rectangle x:Name="VerLn" Width="1" Stroke="#DCDCDC" Margin="0,0,1,0" Grid.RowSpan="2" SnapsToDevicePixels="true" Fill="White">
      <Rectangle.Height>
             <MultiBinding Converter="{StaticResource TreeViewLineConverter}">
                   <MultiBinding.Bindings>
                         <Binding  RelativeSource="{RelativeSource AncestorType=TreeView}" Path="ActualHeight" ></Binding>
                         <Binding  RelativeSource="{RelativeSource AncestorType=TreeView}" Path="ActualWidth"></Binding>
                         <Binding  RelativeSource="{RelativeSource TemplatedParent}"></Binding>
                         <Binding  RelativeSource="{RelativeSource Self}"></Binding>
                         <Binding  ElementName="Expander" Path="IsChecked"></Binding>
                   </MultiBinding.Bindings>
            </MultiBinding>

    </Rectangle.Height>
</Rectangle>

 最后增加下划线，最终效果：

 <local:TreeViewLineConverter x:Key="TreeViewLineConverter"></local:TreeViewLineConverter>
        <Style x:Key="TreeViewItemFocusVisual">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Rectangle/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <PathGeometry x:Key="TreeArrow" Figures="M0,0 L0,6 L6,0 z"/>
        <!-- Toggle Button -->
        <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
            <Setter Property="Focusable" Value="False"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ToggleButton">
                        <Grid Width="15" Height="15" SnapsToDevicePixels="True">
                            <Rectangle Width="13" Height="13" Stroke="#919191" SnapsToDevicePixels="true">
                                <Rectangle.Fill>
                                    <LinearGradientBrush EndPoint="0.5,2" StartPoint="0.5,0">
                                        <GradientStop Color="White" Offset="0"/>
                                        <GradientStop Color="Silver" Offset="0.5"/>
                                        <GradientStop Color="LightGray" Offset="1"/>
                                    </LinearGradientBrush>
                                </Rectangle.Fill>
                            </Rectangle>
                            <Rectangle x:Name="ExpandPath" Width="1" Height="7" Stroke="Gray" SnapsToDevicePixels="true"/>
                            <Rectangle Width="7" Height="1" Stroke="Gray" SnapsToDevicePixels="true"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="Visibility"  TargetName="ExpandPath" Value="Collapsed"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>


        <Style x:Key="StretchTreeViewItemStyle" TargetType="{x:Type TreeViewItem}" >
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
            <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="Padding" Value="1,0,0,0"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TreeViewItem}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition MinWidth="19" Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            <Border x:Name="Bd" Margin="-1600 0 0 0" Padding="1600 0 0 0" BorderThickness="0 0 0 1" BorderBrush="LightGray" Background="{TemplateBinding Background}" Grid.Column="1" SnapsToDevicePixels="true">
                                <ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                            </Border>
                            <!-- Connecting Lines -->
                            <Rectangle x:Name="HorLn" Margin="9,-1,0,0" Height="1" Stroke="#DCDCDC" SnapsToDevicePixels="True"/>
                            <Rectangle x:Name="VerLn" Width="1" Stroke="#DCDCDC" Margin="0,0,1,0" Grid.RowSpan="2" SnapsToDevicePixels="true" Fill="White">

                                <Rectangle.Height>
                                    <MultiBinding Converter="{StaticResource TreeViewLineConverter}">
                                        <MultiBinding.Bindings>
                                            <Binding  RelativeSource="{RelativeSource AncestorType=TreeView}" Path="ActualHeight" ></Binding>
                                            <Binding  RelativeSource="{RelativeSource AncestorType=TreeView}" Path="ActualWidth"></Binding>
                                            <Binding  RelativeSource="{RelativeSource TemplatedParent}"></Binding>
                                            <Binding  RelativeSource="{RelativeSource Self}"></Binding>
                                            <Binding  ElementName="Expander" Path="IsChecked"></Binding>
                                        </MultiBinding.Bindings>
                                    </MultiBinding>

                                </Rectangle.Height>
                            </Rectangle>
                            <ToggleButton x:Name="Expander" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ExpandCollapseToggleStyle}"/>
                            <ItemsPresenter x:Name="ItemsHost" Grid.Column="1" Grid.Row="1">
                            </ItemsPresenter>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsExpanded" Value="false">
                                <Setter Property="Visibility" TargetName="ItemsHost" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="HasItems" Value="false">
                                <Setter Property="Visibility" TargetName="Expander" Value="Hidden"/>
                            </Trigger>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter Property="Background" TargetName="Bd" 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 Property="Background" TargetName="Bd" 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.Triggers>
                <Trigger Property="VirtualizingStackPanel.IsVirtualizing" Value="true">
                    <Setter Property="ItemsPanel">
                        <Setter.Value>
                            <ItemsPanelTemplate>
                                <VirtualizingStackPanel/>
                            </ItemsPanelTemplate>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>

使用：

<TreeView ItemsSource="{Binding Path=Items}" Grid.Row="1" ItemContainerStyle="{StaticResource StretchTreeViewItemStyle}">
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding Children}">
                    <DockPanel LastChildFill="False">
                        <CheckBox DockPanel.Dock="Left" Content="{Binding Text}" Margin="3" IsChecked="{Binding IsCheck}"></CheckBox>
                        <Rectangle DockPanel.Dock="Right" Width="100" Height="20" StrokeThickness="0" Fill="{Binding Color}"></Rectangle>
                        <Border BorderBrush="LightGray" BorderThickness="1 0 1 0" DockPanel.Dock="Right" Width="250">
                            <TextBlock Text="{Binding Name}" TextAlignment="Center" VerticalAlignment="Center"></TextBlock>
                        </Border>
                    </DockPanel>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>

数据类：

    public class TreeViewData
    {
        public List<ITreeViewData> Children { get; set; }
        public string Name { get; set; }
        public string Text { get; set; }
        public SolidColorBrush Color { get; set; }
        public bool IsCheck { get; set; }
    }

数据：

public List<TreeViewData> Items { get; set; } = new List<TreeViewData>(); 
var t1 = new TreeViewData() { Name = "Test1", Text = "测试1", Color = Brushes.Red };
            var t2 = new TreeViewData() { Name = "Test2", Text = "测试2", Color = Brushes.Yellow };
            var t3 = new TreeViewData() { Name = "Test3", Text = "测试3", Color = Brushes.Green };
            var t6 = new TreeViewData() { Name = "Test6", Text = "测试6", Color = Brushes.Green };
            t2.Children = new List<ITreeViewData>() { t3,t6 };
            var t4 = new TreeViewData() { Name = "Test4", Text = "测试4", Color = Brushes.Blue };
            var t5 = new TreeViewData() { Name = "Test5", Text = "测试5", Color = Brushes.Orange };
            t4.Children = new List<ITreeViewData>() { t5 };
            Items.Add(t1);
            Items.Add(t2);
            Items.Add(t4);