C# 基本扩展器样式，替代标题颜色

是否可以创建某种基本扩展样式，并在派生样式中覆盖标题的背景色？ 在我的应用程序中，我经常使用扩展器，我想更改标题的背景色。我知道我可以复制粘贴我的样式并编辑颜色，但最好是基于“基本样式”创建一个新样式并设置标题的背景色。 但我不知道如何使用这种颜色。 这是这行的颜色：下面我想更改（标题中的边框）：border Name=“border”。。。我无法访问派生样式的setter中的“border”

这是我的（基本）风格：

我想这样做：

<Style x:Key="ExpanderStyleRed" BasedOn="{StaticResource ExpanderStyle}" TargetType="Expander">
            <Setter Property="???" Value="Red"/>
<Style>

---

使用

模板绑定

：

        <Style TargetType="Expander" x:Key="ExpanderStyle">
        <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/>
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextColor}}"/>
        <Setter Property="Template">
            <Setter.Value>
                <!-- Control template for expander -->
                <ControlTemplate TargetType="Expander" x:Name="exp">
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Name="ContentRow" Height="0"/>
                        </Grid.RowDefinitions>
                        <Border Name="border" Grid.Row="0" Background="{TemplateBinding Background}" BorderThickness="1" CornerRadius="4,4,0,0" >
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*" />
                                    <ColumnDefinition Width="20" />
                                </Grid.ColumnDefinitions>
                                <ToggleButton x:Name="tb" FontFamily="Marlett" FontSize="9.75" Background="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}" Foreground="Black" Grid.Column="1" Content="u" IsChecked="{Binding Path=IsExpanded,Mode=TwoWay,RelativeSource={RelativeSource TemplatedParent}}" />
                                <ContentPresenter x:Name="HeaderContent" Grid.Column="0" Margin="4" ContentSource="Header" RecognizesAccessKey="True" />
                            </Grid>
                        </Border>
                        <Border x:Name="Content" Grid.Row="1" BorderThickness="1,0,1,1" CornerRadius="0,0,4,4" >
                            <ContentPresenter Margin="4" />
                        </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsExpanded" Value="True">
                            <Setter TargetName="ContentRow" Property="Height" Value="{Binding ElementName=Content,Path=Height}" />
                            <Setter Property="Content" TargetName="tb" Value="t"></Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="ExpanderStyleRed" BasedOn="{StaticResource ExpanderStyle}" TargetType="Expander">
        <Setter Property="Background" Value="#2fff0000"/>
    </Style>

然后：

    <Grid>

    <Expander x:Name="expander1" Style="{DynamicResource ExpanderStyle}" Header="Expander" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="7,10,0,0" Height="108">
        <TextBlock Width="250" Height="150" TextWrapping="Wrap">
            asklsaklsa saaskklsaklas alsaklalkjd
            asklsaklsaklsa saklsaklsakl jsajkjska
            saklsaklsakl sasa
        </TextBlock>
    </Expander>

    <Expander x:Name="expander2" Style="{DynamicResource ExpanderStyleRed}" Header="Expander" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="12,126,0,0" Height="133">
        <TextBlock Width="250" Height="150" TextWrapping="Wrap">
            asklsaklsa saaskklsaklas alsaklalkjd
            asklsaklsaklsa saklsaklsakl jsajkjska
            saklsaklsakl sasa
        </TextBlock>
    </Expander>

</Grid>

asklsaklsa saskklsaklas alsaklalkjd
ASKLSAKLSAKLSAKLSAKLSAKL jsajkjska
萨克尔萨萨酒店
asklsaklsa saskklsaklas alsaklalkjd
ASKLSAKLSAKLSAKLSAKLSAKL jsajkjska
萨克尔萨萨酒店

    <Grid>

    <Expander x:Name="expander1" Style="{DynamicResource ExpanderStyle}" Header="Expander" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="7,10,0,0" Height="108">
        <TextBlock Width="250" Height="150" TextWrapping="Wrap">
            asklsaklsa saaskklsaklas alsaklalkjd
            asklsaklsaklsa saklsaklsakl jsajkjska
            saklsaklsakl sasa
        </TextBlock>
    </Expander>

    <Expander x:Name="expander2" Style="{DynamicResource ExpanderStyleRed}" Header="Expander" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="12,126,0,0" Height="133">
        <TextBlock Width="250" Height="150" TextWrapping="Wrap">
            asklsaklsa saaskklsaklas alsaklalkjd
            asklsaklsaklsa saklsaklsakl jsajkjska
            saklsaklsakl sasa
        </TextBlock>
    </Expander>

</Grid>