在ListBoxItem的Style中无法设置Foreground解决思路

在ListBoxItem的Style中无法设置Foreground
写了一个ListBoxItem的Style，其中有个触发器，满足条件设置字体颜色为Red，但是就是没效果，请大家帮忙。代码如下：
<Style TargetType="ListBoxItem">
            <Setter Property="ContentTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <StackPanel>
                            <Label Content="{Binding Id}" Foreground="Blue" />
                        </StackPanel>
                    </DataTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding Path=Id}" Value="1" />
                    </MultiDataTrigger.Conditions>
                    <MultiDataTrigger.Setters>
                        <Setter Property="Foreground" Value="Red" />
                    </MultiDataTrigger.Setters>
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>

红色的代码没效果，什么原因呢？
------解决方案--------------------
错误原因是Trigger改动的是ListBoxItem的颜色，而不是Label的颜色（那个<Label Content="{Binding Id}" Foreground="Blue" />）。

两种改法，
一、Label的颜色绑定到ListBoxItem的颜色上，改变ListBoxItem的颜色就会改变Label的颜色。
<Label Content="{Binding Id}" Foreground="{Binding Foreground,RelativeSource={RelativeSource AncestorType=ListBoxItem}}" />

二、采用DataTemplate.Triggers(代码比较少和清晰）：

<Style TargetType="ListBoxItem">

    <Setter Property="ContentTemplate">

        <Setter.Value>

            <DataTemplate>

                <StackPanel>

                    <Label Name="itemLable" Content="{Binding Id}" Foreground="Black" />

                </StackPanel>

                <DataTemplate.Triggers>

                    <DataTrigger Binding="{Binding Id}" Value="1">

                        <Setter Property="Foreground" Value="Red" TargetName="itemLable"/>

                    </DataTrigger>

                </DataTemplate.Triggers>

            </DataTemplate>

        </Setter.Value>

    </Setter>

</Style>