WPF 三态按钮(PNG贴图)

<Window.Resources>  
Style x:Key="ButtonLeft" TargetType="{x:Type Button}">  
        <Setter Property="Template">  
            <Setter.Value>  
                <ControlTemplate TargetType="{x:Type Button}">  
                    <StackPanel Orientation="Horizontal">  
                        <Image Name="minBtn" Source="/FingerPrint;component/Resources/BG_btn_normal.png" />  
                    </StackPanel>  
                    <ControlTemplate.Triggers>  
                        <Trigger Property="IsMouseOver" Value="True">  
                            <Setter Property="Source" Value="/FingerPrint;component/Resources/BG_btn_hover.png" TargetName="minBtn" />  
                        </Trigger>  
                        <Trigger Property="IsPressed" Value="True">  
                            <Setter Property="Source" Value="/FingerPrint;component/Resources/BG_btn_click.png" TargetName="minBtn" />  
                        </Trigger>  
                    </ControlTemplate.Triggers>  
                </ControlTemplate>  
            </Setter.Value>  
        </Setter>  
    </Style>  
  
</Window.Resources>  
  
    <Button   Content="Button" Height="31" HorizontalAlignment="Left" Margin="269,95,0,0" Name="button1" VerticalAlignment="Top" Width="143" Foreground="#FFDE4747" Focusable="True" BorderBrush="{x:Null}" BorderThickness="0" Style="{StaticResource ButtonLeft}">  
    </Button>  


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<Style x:Key="RadioLeft" TargetType="{x:Type RadioButton}">  
    <Setter Property="Template">  
        <Setter.Value>  
            <ControlTemplate TargetType="{x:Type RadioButton}">  
                <StackPanel Orientation="Horizontal" >  
                    <ContentControl Name="BtnFont" VerticalAlignment="Center"  Content="{TemplateBinding Content}"  FontFamily="Microsoft JhengHei" FontWeight="Bold" FontSize="16" Foreground="#7d7d7d" />  
                    <Image Stretch="None" VerticalAlignment="Center" Margin="5,0,0,0" Name="BtnBackGround" Source="{x:Null}" />  
                </StackPanel>  
                <ControlTemplate.Triggers>  
                    <MultiTrigger>  
                        <MultiTrigger.Conditions>  
                            <Condition Property="IsMouseOver" Value="True"/>  
                            <Condition Property ="IsChecked" Value="False" />  
                        </MultiTrigger.Conditions>  
  
                        <Setter Property="Foreground" Value="#FFFFFF" TargetName="BtnFont" />  
  
                    </MultiTrigger>  
  
                    <MultiTrigger>  
                        <MultiTrigger.Conditions>  
                            <Condition Property="IsPressed" Value="True"/>  
                            <Condition Property ="IsChecked" Value="False" />  
                        </MultiTrigger.Conditions>  
                        <Setter Property="Foreground" Value="#7d7d7d" TargetName="BtnFont" />  
                    </MultiTrigger>  
  
  
                    <MultiTrigger>  
                        <MultiTrigger.Conditions>  
                            <Condition Property ="IsChecked" Value="True" />  
                        </MultiTrigger.Conditions>  
                        <Setter Property="Source" Value="/FingerPrint;component/Resources/label.png " TargetName="BtnBackGround" />  
                        <Setter Property="Foreground" Value=" #7ebdff" TargetName="BtnFont" />  
                    </MultiTrigger>  
                </ControlTemplate.Triggers>  
            </ControlTemplate>  
        </Setter.Value>  
    </Setter>  
</Style>