c# - 访问样式元素

Question

我有一个 slider 样式(剪切版)

<Style x:Key="SliderThumb" TargetType="Thumb">
    <Setter Property="SnapsToDevicePixels" Value="true" />
    <Setter Property="OverridesDefaultStyle" Value="true" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="Thumb">
                <Ellipse Height="15" Width="15" Fill="White"></Ellipse>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<ControlTemplate x:Key="Slider" TargetType="Slider">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" MinHeight="{TemplateBinding MinHeight}" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Track Grid.Row="1" x:Name="PART_Track"   >
            <Track.DecreaseRepeatButton>
                <RepeatButton Style="{StaticResource SliderRepeatButton1}"  Command="Slider.DecreaseLarge" />
            </Track.DecreaseRepeatButton>
            <Track.Thumb>
                <Thumb Style="{StaticResource SliderThumb}"  />
            </Track.Thumb>
            <Track.IncreaseRepeatButton>
                <RepeatButton Style="{StaticResource SliderRepeatButton}" Command="Slider.IncreaseLarge" />
            </Track.IncreaseRepeatButton>
        </Track>
    </Grid>
</ControlTemplate>

<Style x:Key="BigSliderStyle" TargetType="Slider">
    <Setter Property="Focusable" Value="False"/>
    <Setter Property="SnapsToDevicePixels" Value="true" />
    <Setter Property="OverridesDefaultStyle" Value="true" />
    <Style.Triggers>
        <Trigger Property="Orientation" Value="Horizontal">
            <Setter Property="MinHeight" Value="21" />
            <Setter Property="MinWidth" Value="104" />
            <Setter Property="Template" Value="{StaticResource Slider}" />
        </Trigger>
    </Style.Triggers>
</Style>

在我的界面中，我将其创建为

<Slider Style="{StaticResource BigSliderStyle}"/>

我只需要将工具提示绑定(bind)到与椭圆相关的 slider 缩略图。有什么方法可以从 XAML 表单中访问椭圆属性吗？

Answer 1

这应该可以解决您的问题:

<Style x:Key="SliderThumb" TargetType="Thumb">
    <Setter Property="SnapsToDevicePixels" Value="true" />
    <Setter Property="OverridesDefaultStyle" Value="true" />
    <Setter Property="ToolTip"><!--just add this part to your code-->
        <Setter.Value>
            <TextBlock Text="Some text"/><!-- also you can use Text="{Binding propertyName}"-->
        </Setter.Value>
    </Setter><!--just add this part to your code-->
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="Thumb">
                <Ellipse Height="15" Width="15" Fill="White"></Ellipse>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

您已经可以通过样式访问缩略图。该元素支持开箱即用的工具提示，因此无需关注 ellipse，因为它只是 thumb 占位符的模板。< br/>这也将允许您为 Slider 使用不同的模板，让您在整个应用程序中保持 ToolTip。