Silverlight：如何在setter中使用一个绑定的样式（或等效的工作）

问题描述

如果回答的人是对的，您不能放绑定为Silverlight中样式中setter中的值。这是一个耻辱，因为我有4个文本框，都使用完全相同的绑定他们的Opacity属性。有没有在某种意义上风格他们的不透明度属性，以便所有四个人指向相同的约束力？否则，我必须单独设置每个Opacity属性。在我的情况下，它更糟糕 - 所有四个共享其他属性绑定，这意味着每个TextBlock声明是相当长的，但它们几乎是相同的（它们的属性绑定，也就是）。我知道我可以简洁地在代码隐藏中设置所有共享的属性绑定，但是如果有一个，我想要一个XAML解决方案。

谢谢！ >

解决方案

这是如何完成的。您使用 ContentControl 并指定一个 ControlTemplate 作为静态资源： -

 < Grid.Resources> 
< ControlTemplate x：Key =CommonTextBlockTargetType =ContentControl> 
< TextBlock Opacity ={Binding SomeOpacity}Text ={TemplateBinding Content}/> 
< / ControlTemplate> 
< Grid.Resource> 
< ContentControl Content ={Binding SomeTextValue}Template ={StaticResource CommonTextBlock}/> 
< ContentControl Content ={Binding SomeOtherTextValue}Template ={StaticResource CommonTextBlock}/> 
  

现在，您可以根据需要将绑定的其他属性与控件模板挂起。 p>

这种方法可以扩展到 Style ： -

 < Grid.Resources> 
< ControlTemplate x：Key =CommonTextBlockTargetType =ContentControl> 
< TextBlock Opacity ={Binding SomeOpacity}Text ={TemplateBinding Content}/> 
< / ControlTemplate> 
< Style x：Key =CommonTextBlockStyleTargetType =ContentControl> 
< Setter Property =TemplateValue ={StaticResource CommonTextBlock}/> 
< Setter Property =ForegroundValue =Blue/> 
< / Style> 
< Grid.Resource> 
< ContentControl Content ={Binding SomeTextValue}Style ={StaticResource CommonTextBlockStyle}/> 
< ContentControl Content ={Binding SomeOtherTextValue}Style ={StaticResource CommonTextBlockStyle}/> 
  

If the person who answered this question is right, you cannot put a binding as the value in a setter in a style in Silverlight. Which is a shame, because I have 4 textblocks that all use the exact same binding for their Opacity property. Is there anyway to in a sense "style" their Opacity property so that all four of them point to the same binding? Otherwise, I have to set each Opacity property individually. In my case it's even worse - all four share other property bindings as well, which means each TextBlock declaration is pretty dang long, and yet they're all virtually the same (their property bindings, that is). I know I could concisely set all their shared property bindings in the code-behind, but I'd like a XAML solution if there is one.

Thanks!

解决方案

Here is how its done. You use a ContentControl and specify a ControlTemplate for it as a static resource:-

<Grid.Resources>
    <ControlTemplate x:Key="CommonTextBlock" TargetType="ContentControl">
        <TextBlock Opacity="{Binding SomeOpacity}" Text="{TemplateBinding Content}" />
    </ControlTemplate>
<Grid.Resource>
<ContentControl Content="{Binding SomeTextValue}" Template="{StaticResource CommonTextBlock}" />
<ContentControl Content="{Binding SomeOtherTextValue}" Template="{StaticResource CommonTextBlock}" />

Now you can bung as may other properties with bindings in to the Control Template as you want.

This approach could be extended to Style:-

<Grid.Resources>
    <ControlTemplate x:Key="CommonTextBlock" TargetType="ContentControl">
        <TextBlock Opacity="{Binding SomeOpacity}" Text="{TemplateBinding Content}" />
    </ControlTemplate>
    <Style x:Key="CommonTextBlockStyle" TargetType="ContentControl">
       <Setter Property="Template" Value="{StaticResource CommonTextBlock}" />
       <Setter Property="Foreground" Value="Blue" />
    </Style>
<Grid.Resource>
<ContentControl Content="{Binding SomeTextValue}" Style="{StaticResource CommonTextBlockStyle}" />
<ContentControl Content="{Binding SomeOtherTextValue}" Style="{StaticResource CommonTextBlockStyle}" />

这篇关于Silverlight：如何在setter中使用一个绑定的样式（或等效的工作）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！