WPF TreeView 样式
美工出了一张图。。。

没做过类似的效果啊
给个提示 或者谁有源代码 发我一个啊
[解决办法]
WPF TreeView的简单使用例子
http://www.cnblogs.com/izualx/archive/2011/02/03/1949055.html
[解决办法]

 <Style x:Key="styleTreeViewExpandCollapse" TargetType="{x:Type ToggleButton}">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ToggleButton}">
                        <TextBlock x:Name="icon" VerticalAlignment="Center" TextAlignment="Right" Text="+" Cursor="Hand"/>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="true">
                                <Setter TargetName="icon" Property="Text" Value="-" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="IsExpanded" Value="{Binding IsExpanded}"/>
            <Setter Property="IsSelected" Value="false" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TreeViewItem}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition/>
                            </Grid.RowDefinitions> 
 
                            <ToggleButton x:Name="Expander" Grid.Column="0" Style="{StaticResource styleTreeViewExpandCollapse}" IsChecked="{Binding Path=IsExpanded,RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press" Width="20" Height="18"/>
                            <Border Grid.Column="1"  x:Name="back" CornerRadius="0" BorderThickness="0 0 0 2" >
                                <ContentPresenter x:Name="PART_Header" Cursor="Hand" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
                            </Border>
                            <ItemsPresenter x:Name="ItemsHost" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter TargetName="back" Property="BorderBrush" Value="Red"/>
                                <!--<Setter TargetName="back" Property="Background" Value="Gray"/>-->
                            </Trigger>
                            <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>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="HasHeader" Value="false"/>
                                    <Condition Property="Width" Value="Auto"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="PART_Header" Property="MinWidth" Value="75"/>
                            </MultiTrigger>
                            <MultiTrigger> 
 
                                <MultiTrigger.Conditions>
                                    <Condition Property="HasHeader" Value="false"/>
                                    <Condition Property="Height" Value="Auto"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="PART_Header" Property="MinHeight" Value="22"/>
                            </MultiTrigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>