Question

我有以下风格：

<Style TargetType="{x:Type local:MetroTabControl}">
    <Style.Triggers>
        <Trigger Property="SingleRow" Value="True">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type local:MetroTabControl}">
                        <Grid>
                            <Grid KeyboardNavigation.TabNavigation="Local" SnapsToDevicePixels="True">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="Auto"/>
                                    <RowDefinition Height="Auto"/>
                                    <RowDefinition Height="*"/>
                                </Grid.RowDefinitions>
                                <Grid>
                                    <ScrollViewer x:Name="ScrollViewer" VerticalScrollBarVisibility="Disabled" HorizontalScrollBarVisibility="Hidden" Style="{DynamicResource TabPanelScrollViewer}">
                                        <TabPanel x:Name="HeaderPanel" IsItemsHost="True" Panel.ZIndex="1" KeyboardNavigation.TabIndex="1"/>
                                    </ScrollViewer>
                                    <Button x:Name="AddTabItem" Content="&#xE109;"  Style="{DynamicResource TabControlButton}" HorizontalAlignment="Right" VerticalAlignment="Top"/>
                                </Grid>
                                <Border Grid.Row="1" x:Name="TabPanelBorder" Background="Transparent">
                                    <Rectangle x:Name="TabPanelBorderRectangle" Fill="{StaticResource TabPanelBorderBrush}" Height="2"/>
                                </Border>
                                <Border Grid.Row="2" Background="{StaticResource TabControlBackground}"/>
                                <ContentPresenter Grid.Row="2" Name="PART_SelectedContentHost" ContentSource="SelectedContent"/>
                            </Grid>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <!--<Setter Property="Template" Value="{StaticResource MetroTabControlSingleRow}" />-->
        </Trigger>
        <Trigger Property="SingleRow" Value="False">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type local:MetroTabControl}">
                        <Grid KeyboardNavigation.TabNavigation="Local" SnapsToDevicePixels="True">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition Height="*"/>
                            </Grid.RowDefinitions>
                            <Border Background="Transparent" BorderThickness="0,0,0,2"  BorderBrush="{StaticResource TabPanelBorderBrush}">
                                <DockPanel LastChildFill="True">
                                    <Button x:Name="AddTabItem" Style="{DynamicResource TabControlButton}" DockPanel.Dock="Right">
                                        <Path Stroke="{Binding Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Button}}}" Data="M0,4 H8 M4,0 V8"  StrokeThickness="2" />
                                    </Button>
                                    <TabPanel x:Name="HeaderPanel" IsItemsHost="True" Panel.ZIndex="1" KeyboardNavigation.TabIndex="1"/>
                                </DockPanel>
                            </Border>
                            <Border Grid.Row="1" Background="{StaticResource TabControlBackground}"/>
                            <ContentPresenter Grid.Row="1" Name="PART_SelectedContentHost" ContentSource="SelectedContent"/>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <!--<Setter Property="Template" Value="{StaticResource MetroTabControlMultiRows}" />-->
        </Trigger>
    </Style.Triggers>
</Style>

我希望有另一种风格，BasedOn以上，但只需更改一次 - 我想更改TabPanelBorderRectangle Fill的{{1}}颜色。

所以，要使用BasedOn，我写了以下内容：

Rectangle

但我不知道如何从<Style TargetType="{x:Type local:MetroTabControl}" BasedOn="{StaticResource {x:Type local:MetroTabControl}}"> </Style>样式更改TabPanelBorderRectangle Rectangle的颜色。

我试过像

这样的东西

BasedOn

但它不起作用（无法在样式设置器上设置TargetName属性） ..

我该怎么做？

Answer 1

由于错误声明您无法在样式设置器中使用TargetName。

作为一种解决方法，您可以执行的操作是，而不是使用StaticResource作为您的画笔，使用DynamicResource绑定它，以便我们可以利用XAML的资源查找行为。

<Rectangle x:Name="TabPanelBorderRectangle"
           Fill="{DynamicResource TabPanelBorderBrush}"/>

现在，您可以通过为画笔指定相同的键并在那里提供颜色值，以自己的风格override that brush。

<Style TargetType="{x:Type local:MetroTabControl}"
       BasedOn="{StaticResource {x:Type local:MetroTabControl}}">
    <Style.Resources>
         <SolidColorBrush x:Key="TabPanelBorderBrush" Color="Green"/>
    </Style.Resources>
</Style>

由于brush通过dynamic resource绑定，因此会从您的样式资源中选择most local value，在上述情况下将为绿色。

WPF从BasedOn更改Element的属性值

1 个答案: