c# – Base Expander Style,覆盖标题颜色

是否可以创建某种基本扩展器样式并覆盖派生样式中标题的背景颜色？
在我的应用程序中,我使用了很多扩展器,我想改变标题的背景颜色.我知道我可以复制并粘贴我的样式并编辑颜色,但是根据“基本样式”创建新样式并设置标题的背景颜色会更好.
但我不知道如何访问这种颜色.
它是这一行的颜色：下面我想改变(标题中的边框)：Border Name =“border”…我无法在派生样式的setter中访问“border”…

这是我的(基础)风格：

<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="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}" 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>

我想做这样的事情：

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

解决方法:

使用TemplateBinding：

        <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>

标签：c,wpf,xaml,expander,basedon
来源： https://codeday.me/bug/20190702/1353727.html