WPF中TreeView控件如何去掉其前面的加减符号?

Question

这种问题，下载一个StyleSnooper或类似的，看看默认的Style是什么样的，改改就可以了。你要把Header前面的箭头去掉？[code=XAML]
<Window x:Class="WpfApplication11.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication11"
    Title="Window1" Height="300" Width="300" Name="MainWindow">
    <Window.Resources>
        <Style TargetType="TreeViewItem">
            <Style.Triggers>
                <Trigger Property="VirtualizingStackPanel.IsVirtualizing" Value="True">
                    <Setter Property="ItemsControl.ItemsPanel">
                        <Setter.Value>
                            <ItemsPanelTemplate>
                                <VirtualizingStackPanel IsItemsHost="True" />
                            </ItemsPanelTemplate>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
            <Style.Resources>
                <ResourceDictionary />
            </Style.Resources>
            <Setter Property="Panel.Background" Value="#00FFFFFF"/>
            <Setter Property="Control.HorizontalContentAlignment">
                <Setter.Value>
                    <Binding Path="HorizontalContentAlignment" RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=ItemsControl, AncestorLevel=1}" />
                </Setter.Value>
            </Setter>
            <Setter Property="Control.VerticalContentAlignment">
                <Setter.Value>
                    <Binding Path="VerticalContentAlignment" RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=ItemsControl, AncestorLevel=1}" />
                </Setter.Value>
            </Setter>
            <Setter Property="Control.Padding" Value="1,0,0,0"/>
            <Setter Property="TextElement.Foreground">
                <Setter.Value>
                    <DynamicResource ResourceKey="{x:Static SystemColors.ControlTextBrushKey}" />
                </Setter.Value>
            </Setter>
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TreeViewItem">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto" MinWidth="19" />
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto" />
                                <RowDefinition />
                            </Grid.RowDefinitions>
                            <Border BorderThickness="{TemplateBinding Border.BorderThickness}" Padding="{TemplateBinding Control.Padding}" BorderBrush="{TemplateBinding Border.BorderBrush}" Background="{TemplateBinding Panel.Background}" Name="Bd" SnapsToDevicePixels="True" Grid.Column="1">
                                <ContentPresenter Content="{TemplateBinding HeaderedContentControl.Header}" ContentTemplate="{TemplateBinding HeaderedContentControl.HeaderTemplate}" ContentStringFormat="{TemplateBinding HeaderedItemsControl.HeaderStringFormat}" ContentSource="Header" Name="PART_Header" HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
                            </Border>
                            <ItemsPresenter Name="ItemsHost" Grid.Column="1" Grid.Row="1" Grid.ColumnSpan="2" />
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="TreeViewItem.IsExpanded" Value="False">
                                <Setter Property="UIElement.Visibility" TargetName="ItemsHost">
                                    <Setter.Value>
                                        <x:Static Member="Visibility.Collapsed" />
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                            <Trigger Property="TreeViewItem.IsSelected" Value="True">
                                <Setter Property="Panel.Background" TargetName="Bd">
                                    <Setter.Value>
                                        <DynamicResource ResourceKey="{x:Static SystemColors.HighlightBrushKey}" />
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="TextElement.Foreground">
                                    <Setter.Value>
                                        <DynamicResource ResourceKey="{x:Static SystemColors.HighlightTextBrushKey}" />
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="TreeViewItem.IsSelected" Value="True">
                                    </Condition>
                                    <Condition Property="Selector.IsSelectionActive" Value="False">
                                    </Condition>
                                </MultiTrigger.Conditions>
                                <Setter Property="Panel.Background" TargetName="Bd">
                                    <Setter.Value>
                                        <DynamicResource ResourceKey="{x:Static SystemColors.ControlBrushKey}" />
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="TextElement.Foreground">
                                    <Setter.Value>
                                        <DynamicResource ResourceKey="{x:Static SystemColors.ControlTextBrushKey}" />
                                    </Setter.Value>
                                </Setter>
                            </MultiTrigger>
                            <Trigger Property="UIElement.IsEnabled" Value="False">
                                <Setter Property="TextElement.Foreground">
                                    <Setter.Value>
                                        <DynamicResource ResourceKey="{x:Static SystemColors.GrayTextBrushKey}" />
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <TreeView>
            <TreeViewItem Header="12345">
                <TreeViewItem Header="512">
                    <TreeViewItem Header="1232"/>
                </TreeViewItem>
            </TreeViewItem>
            <TreeViewItem Header="12345">
                <TreeViewItem Header="512"/>
            </TreeViewItem>
            <TreeViewItem Header="12345"/>
        </TreeView>
    </Grid>
</Window>
[/code]Hope this helps

Answer 1

顶~~ 感谢 zhouyongh ~~