c# - 在不影响 ComboBox 的情况下为 TextBlock 应用默认样式

Question

我想为我的应用程序中使用 Royal 主题的所有 TextBlock 控件设置一个默认样式。例如:

<Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource {x:Type TextBlock}}">
    <Setter Property="Margin" Value="4"/>        
</Style>

这很好地继承了 Royal 主题，但不幸的是，它也影响了在其他控件(如 ComboBox)的模板中使用的 TextBlock 的样式，我不想那个。

我已经尝试将我的样式降低一层(例如在 Grid.Resources 中)但没有成功。

有办法吗？当然，我不想命名我的样式(使用 x:key)，因为我不想显式地应用于我的应用程序的每个 TextBlock自定义样式。并且无需创建子类来覆盖那里的样式。

有什么想法吗？提前致谢!

附言我已经查看了可能相似的问题，但没有对我有用的答案。

编辑:

谢谢大家的回答。我希望有一些我想念的方法可以区分其他控件模板中使用的 TextBlock。

Answer 1

(抱歉我的英语不好)

一种方法是“强制”ComboBox 和 ComboBoxItem 内的 TextBlock 使用另一种样式。它不是很漂亮，但它有效:)

只需将其添加到您的 ResourceDictionary 中，现在您可以随心所欲地调整 ComboBox 中 TextBlock 的外观

<!-- Default for all TextBlock -->
   <Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource {x:Type TextBlock}}">
    <Setter Property="Margin" Value="4"/>
    <Setter Property="Foreground" Value="Green"/>
</Style>

<!-- Applied only to TextBlocks inside ComboBox -->
<Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource {x:Type TextBlock}}" x:Key="ComboBoxTextBlockStyle">
    <Setter Property="Margin" Value="0"/>
    <Setter Property="Foreground" Value="Blue"/>
</Style>


<Style  TargetType="{x:Type ComboBox}">
    <Setter Property="FocusVisualStyle">
        <Setter.Value>
            <Style>
                <Setter Property="Control.Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Rectangle Margin="4,4,21,4" SnapsToDevicePixels="True" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </Setter.Value>
    </Setter>
    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
    <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
    <Setter Property="BorderBrush" Value="#FFA7A6AA"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="Padding" Value="0,1"/>
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
    <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
    <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ComboBox}">

                <Grid SnapsToDevicePixels="True">

                    <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="1">
                        <Grid Grid.IsSharedSizeScope="True">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="1"/>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition SharedSizeGroup="ComboBoxButton" Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <Border x:Name="SelectedItemBorder" Grid.ColumnSpan="2" Margin="{TemplateBinding Padding}"/>
                            <ContentPresenter ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" Content="{TemplateBinding SelectionBoxItem}" Grid.Column="1" ContentStringFormat="{TemplateBinding SelectionBoxItemStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">

                                <!-- ADD THIS HERE (SELECTED ITEM)-->
                                <ContentPresenter.Resources>
                                    <Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource ComboBoxTextBlockStyle}"/>
                                </ContentPresenter.Resources>

                            </ContentPresenter>
                            <ToggleButton Grid.ColumnSpan="3" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}">
                                <ToggleButton.Style>
                                    <Style TargetType="{x:Type ToggleButton}">
                                        <Setter Property="MinWidth" Value="0"/>
                                        <Setter Property="MinHeight" Value="0"/>
                                        <Setter Property="Width" Value="Auto"/>
                                        <Setter Property="Height" Value="Auto"/>
                                        <Setter Property="Background" Value="Transparent"/>
                                        <Setter Property="Focusable" Value="False"/>
                                        <Setter Property="ClickMode" Value="Press"/>
                                        <Setter Property="Template">
                                            <Setter.Value>
                                                <ControlTemplate TargetType="{x:Type ToggleButton}">
                                                    <Grid Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                                                        <Grid.ColumnDefinitions>
                                                            <ColumnDefinition Width="*"/>
                                                            <ColumnDefinition SharedSizeGroup="ComboBoxButton" Width="Auto"/>
                                                        </Grid.ColumnDefinitions>
                                                        <Microsoft_Windows_Themes:ScrollChrome x:Name="Chrome" Grid.Column="1" HasOuterBorder="False" Padding="1,0,0,0" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsChecked}" Microsoft_Windows_Themes:ScrollChrome.ScrollGlyph="DownArrow" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
                                                    </Grid>
                                                </ControlTemplate>
                                            </Setter.Value>
                                        </Setter>
                                    </Style>
                                </ToggleButton.Style>
                            </ToggleButton>
                        </Grid>
                    </Border>
                    <Popup x:Name="PART_Popup" AllowsTransparency="True" Focusable="False" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
                        <Microsoft_Windows_Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{TemplateBinding ActualWidth}">
                            <Border x:Name="DropDownBorder" BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}" BorderThickness="1" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}">
                                <ScrollViewer x:Name="DropDownScrollViewer">
                                    <Grid RenderOptions.ClearTypeHint="Enabled">
                                        <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                            <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=DropDownBorder}" Height="{Binding ActualHeight, ElementName=DropDownBorder}" Width="{Binding ActualWidth, ElementName=DropDownBorder}"/>
                                        </Canvas>
                                        <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                    </Grid>
                                </ScrollViewer>
                            </Border>
                        </Microsoft_Windows_Themes:SystemDropShadowChrome>
                    </Popup>
                </Grid>
                <ControlTemplate.Triggers>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="IsSelectionBoxHighlighted" Value="True"/>
                            <Condition Property="IsDropDownOpen" Value="False"/>
                        </MultiTrigger.Conditions>
                        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                    </MultiTrigger>
                    <Trigger Property="IsSelectionBoxHighlighted" Value="True">
                        <Setter Property="Background" TargetName="SelectedItemBorder" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                    </Trigger>
                    <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="True">
                        <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
                        <Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
                    </Trigger>
                    <Trigger Property="HasItems" Value="False">
                        <Setter Property="MinHeight" TargetName="DropDownBorder" Value="95"/>
                    </Trigger>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="BorderBrush" TargetName="Bd" Value="#FF335EA8"/>
                    </Trigger>
                    <Trigger Property="IsEnabled" Value="False">
                        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                    </Trigger>
                    <Trigger Property="IsGrouping" Value="True">
                        <Setter Property="ScrollViewer.CanContentScroll" Value="False"/>
                    </Trigger>
                    <Trigger Property="CanContentScroll" SourceName="DropDownScrollViewer" Value="False">
                        <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
                        <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Style.Triggers>
        <Trigger Property="IsEditable" Value="True">
            <Setter Property="IsTabStop" Value="False"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ComboBox}">

                        <Grid SnapsToDevicePixels="True">
                            <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="1">
                                <Grid Grid.IsSharedSizeScope="True">
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="1"/>
                                        <ColumnDefinition Width="*"/>
                                        <ColumnDefinition SharedSizeGroup="ComboBoxButton" Width="Auto"/>
                                    </Grid.ColumnDefinitions>
                                    <TextBox x:Name="PART_EditableTextBox" Grid.Column="1" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsReadOnly="{Binding IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}" Margin="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}">
                                        <TextBox.Style>
                                            <Style TargetType="{x:Type TextBox}">
                                                <Setter Property="OverridesDefaultStyle" Value="True"/>
                                                <Setter Property="AllowDrop" Value="True"/>
                                                <Setter Property="MinWidth" Value="0"/>
                                                <Setter Property="MinHeight" Value="0"/>
                                                <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
                                                <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
                                                <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
                                                <Setter Property="Template">
                                                    <Setter.Value>
                                                        <ControlTemplate TargetType="{x:Type TextBox}">
                                                            <ScrollViewer x:Name="PART_ContentHost" Background="Transparent" Focusable="False" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden" />
                                                        </ControlTemplate>
                                                    </Setter.Value>
                                                </Setter>
                                            </Style>
                                        </TextBox.Style>
                                    </TextBox>
                                    <ToggleButton Background="{x:Null}" Grid.ColumnSpan="3" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}">
                                        <ToggleButton.Style>
                                            <Style TargetType="{x:Type ToggleButton}">
                                                <Setter Property="MinWidth" Value="0"/>
                                                <Setter Property="MinHeight" Value="0"/>
                                                <Setter Property="Width" Value="Auto"/>
                                                <Setter Property="Height" Value="Auto"/>
                                                <Setter Property="Background" Value="Transparent"/>
                                                <Setter Property="Focusable" Value="False"/>
                                                <Setter Property="ClickMode" Value="Press"/>
                                                <Setter Property="Template">
                                                    <Setter.Value>
                                                        <ControlTemplate TargetType="{x:Type ToggleButton}">
                                                            <Grid Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                                                                <Grid.ColumnDefinitions>
                                                                    <ColumnDefinition Width="*"/>
                                                                    <ColumnDefinition SharedSizeGroup="ComboBoxButton" Width="Auto"/>
                                                                </Grid.ColumnDefinitions>
                                                                <Microsoft_Windows_Themes:ScrollChrome x:Name="Chrome" Grid.Column="1" HasOuterBorder="False" Padding="1,0,0,0" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsChecked}" Microsoft_Windows_Themes:ScrollChrome.ScrollGlyph="DownArrow" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
                                                            </Grid>
                                                        </ControlTemplate>
                                                    </Setter.Value>
                                                </Setter>
                                            </Style>
                                        </ToggleButton.Style>
                                    </ToggleButton>
                                </Grid>
                            </Border>
                            <Popup x:Name="PART_Popup" AllowsTransparency="True" Focusable="False" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
                                <Microsoft_Windows_Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{TemplateBinding ActualWidth}">
                                    <Border x:Name="DropDownBorder" BorderBrush="{DynamicResource {x:Static SystemColors.WindowFrameBrushKey}}" BorderThickness="1" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}">
                                        <ScrollViewer x:Name="DropDownScrollViewer">
                                            <Grid RenderOptions.ClearTypeHint="Enabled">
                                                <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                                    <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=DropDownBorder}" Height="{Binding ActualHeight, ElementName=DropDownBorder}" Width="{Binding ActualWidth, ElementName=DropDownBorder}"/>
                                                </Canvas>
                                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                            </Grid>
                                        </ScrollViewer>
                                    </Border>
                                </Microsoft_Windows_Themes:SystemDropShadowChrome>
                            </Popup>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="HasItems" Value="False">
                                <Setter Property="MinHeight" TargetName="DropDownBorder" Value="95"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="BorderBrush" TargetName="Bd" Value="#FF335EA8"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                            </Trigger>
                            <Trigger Property="IsGrouping" Value="True">
                                <Setter Property="ScrollViewer.CanContentScroll" Value="False"/>
                            </Trigger>
                            <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="True">
                                <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
                                <Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
                            </Trigger>
                            <Trigger Property="CanContentScroll" SourceName="DropDownScrollViewer" Value="False">
                                <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/>
                                <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Trigger>
    </Style.Triggers>
</Style>



<Style  TargetType="{x:Type ComboBoxItem}">
    <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type ItemsControl}}}"/>
    <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type ItemsControl}}}"/>
    <Setter Property="Padding" Value="3,0"/>
    <Setter Property="Background" Value="Transparent"/>

    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="True">
                    <ContentPresenter ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">

                        <!-- ADD THIS HERE (ITEMS LIST DROPDOWN)-->
                        <ContentPresenter.Resources>
                            <Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource ComboBoxTextBlockStyle}"/>
                        </ContentPresenter.Resources>

                    </ContentPresenter>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsHighlighted" Value="True">
                        <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                    </Trigger>
                    <Trigger Property="IsEnabled" Value="False">
                        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>