WPF:如果 "IsEnabled=False",则更改用户控件中元素的颜色

WPF: Change Colors of Elements in User Control if "IsEnabled=False"

我有一个 UserControl,它由一个具有 3 列的网格组成:

Name="Test">

<UserControl.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            ...
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</UserControl.Resources>

<Grid Width="{StaticResource DoubleOverallWidthUserControls}" Height="{StaticResource DoubleHeightControls}">
    <Grid.RowDefinitions>
        <RowDefinition Height="auto" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="{StaticResource GridLengthUserControlLabel}" />
        <ColumnDefinition Width="{StaticResource GridLengthUserControlContent}" />
        <ColumnDefinition Width="{StaticResource GridLengthUserControlUnits}" />
    </Grid.ColumnDefinitions>

    <Border
        Grid.Row="0"
        Grid.Column="0"
        BorderBrush="{StaticResource BrushTextInputBorder}"
        BorderThickness="0,0,0,1"
        Cursor="Arrow">
        <TextBlock
            x:Name="TextBlockLabel"
            Width="{StaticResource DoubleWidthUserControlLabel}"
            VerticalAlignment="Center"
            DockPanel.Dock="Top"
            TextAlignment="Left" />
    </Border>
    <Border BorderBrush="{StaticResource BrushBorder}" CornerRadius="3,3,0,0" Grid.Row="0"
        Grid.Column="1" Background="White">
    <TextBox
        x:Name="TextBoxText"
        Width="{StaticResource DoubleWidthUserControlContent}" />
        <Border.Style>
            <Style TargetType="Border">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding ElementName=Test, Path=IsEnabled}" Value="False">
                        <Setter Property="Background" Value="Gray"></Setter>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </Border.Style>
    </Border>

    <TextBlock
        x:Name="TextBlockUnit"
        Grid.Row="0"
        Grid.Column="2"
        Width="{StaticResource DoubleWidthUserControlUnits}"
        Margin="10,0,0,0"
        VerticalAlignment="Center" />
</Grid>

现在我想在我的控件中更改以下内容(如果它被禁用):

有人可以帮助我吗?

A Style Setter 仅在您未直接设置 属性 时有效。这是因为直接赋值创建了一个所谓的本地值,它比来自 Style Setter 的值具有更高的优先级。有关详细信息,请参阅 Dependency Property Value Precedence

由于要禁用两个边框,可以在资源中创建如下样式:

<UserControl.Resources>
    <Style x:Key="BorderStyle" TargetType="Border">
        <Setter Property="Background" Value="White"/>
        <Style.Triggers>
            <DataTrigger Binding="{Binding ElementName=Test, Path=IsEnabled}"
                         Value="False">
                 <Setter Property="Background" Value="Gray"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</UserControl.Resources>

将此样式指定给您的边框。

<Border Style="{StaticResource BorderStyle}"/>

您甚至可以通过省略 x:Key

使其成为 UserControl 中的默认样式
<UserControl.Resources>
    <Style TargetType="Border">
        ...
    </Style>
</UserControl.Resources>

这样您就不必显式设置样式 属性 如果按钮:

<Border>
    ...
</Border>