Question

我想从dependencyproperty更改TextBlock的前景色但我不改变文本块颜色我的代码中不知道这个问题如何使用触发器更改TextBlock的前景色？

XAML：

<TextBlock Name="TestBlock" Text="Test color" >
    <TextBlock.Style>
        <Style TargetType="TextBlock">
            <Style.Triggers>
                <Trigger Property ="IsMouseOver" Value="True">
                    <Setter Property= "Foreground" Value="Gray"/>
                </Trigger>
                <DataTrigger Binding="{Binding Path=TestColorMode2, RelativeSource={RelativeSource AncestorType={x:Type local:Window1}}}" Value="0">
                    <Setter Property="Foreground" Value="Red" />
                </DataTrigger>
                <DataTrigger Binding="{Binding Path=TestColorMode2, RelativeSource={RelativeSource AncestorType={x:Type local:Window1}}}" Value="1">
                    <Setter Property="Foreground" Value="Blue" />
                </DataTrigger>
                <DataTrigger Binding="{Binding Path=TestColorMode2, RelativeSource={RelativeSource AncestorType={x:Type local:Window1}}}" Value="2">
                    <Setter Property="Foreground" Value="Green" />
                </DataTrigger>
                <DataTrigger Binding="{Binding Path=TestColorMode2, RelativeSource={RelativeSource AncestorType={x:Type local:Window1}}}" Value="3">
                    <Setter Property="Foreground" Value="Black" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TextBlock.Style>
</TextBlock>

CODE：

public static DependencyProperty TestColorModeProperty = DependencyProperty.Register("TestColorMode", typeof(int), typeof(UpdateProgressItem));

public int TestColorMode
{
    get { return (int)GetValue(TestColorModeProperty); }
    set { SetValue(TestColorModeProperty, value); }
}

            ....

private void button1_Click(object sender, RoutedEventArgs e)
{
    TestColorMode++;
}

Answer 1

也指定类型：

<Trigger Property="TextBlock.IsMouseOver" Value="true">
     <Setter Property="TextBlock.Foreground" Value="Gray" />
</Trigger>

Answer 2

这种方式可以帮助你：

<Style x:Key="SimpleLabel" TargetType="{x:Type Label}">
    <Setter Property="HorizontalContentAlignment" Value="Left"/>
    <Setter Property="VerticalContentAlignment" Value="Top"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Label}">
                <Grid>
                    <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/>
                </Grid>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsEnabled" Value="False">
                        <Setter Property="Background" Value="{DynamicResource DisabledBackgroundBrush}" TargetName="Border"/>
                        <Setter Property="BorderBrush" Value="{DynamicResource DisabledBackgroundBrush}" TargetName="Border"/>
                        <Setter Property="Foreground" Value="{DynamicResource DisabledForegroundBrush}"/>
                    </Trigger>
                    <Trigger Property="TextBlock.IsMouseOver" Value="true">
                        <Setter Property="TextBlock.Foreground" Value="Gray" />
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

如何使用触发器更改TextBlock的前景色？

2 个答案: