如何在控件Style或ControlTemplate里面设置窗口的属性？

Question

如题，我定义了一个控件Style，想在这个Style里面设置窗口的属性，能实现吗？

Answer 1

我是想将控件的Validation.HasError属性，绑定到窗口的Tag里面，能使窗口的Tag获得Validation.HasError属性

Answer 2

可以，比如这样：

Tag = {Binding ElementName=_SELF, Path=(Validation.HasError)}

如果需要你也可以自己加个Convert。

 

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Sheldon _Xiao[MSFT]
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Answer 3

<Style x:Key="SuperT" TargetType="{x:Type lib:SuperTextBox}">
  <Setter Property="Tag" Value="{Binding ElementName=_SELF, Path=(Validation.HasError)}"></Setter>
呵呵，请说的全一点好吗，是这样写的吗，我这个是一个控件的样式，想将Valiadation.HasError绑定到调用这个控件的页面的Tag里面，让页面Tag保存这个Valiadation.HasError,

<Style x:Key="SuperT" TargetType="{x:Type lib:SuperTextBox}">
  <Setter Property="Tag" Value="{Binding ElementName=_SELF, Path=(Validation.HasError)}"></Setter>

如果这样写的话不是绑定给了控件本身的Tag吗？

Answer 4

。。。

你现在要设置Window的tag属性，你就要在Window的style里面设置Tag属性啊。

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Sheldon _Xiao[MSFT]
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Answer 5

就是你这个style要是Window的Style，然后是：

<Style x:Key="SuperT" TargetType="{x:Type lib:SuperTextBox}">
  <Setter Property="Window.Tag" Value“(Validation.HasError)"></Setter>

注意 属性是Window。Tag，

 

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Sheldon _Xiao[MSFT]
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Answer 6

我只能写控件Style不能写Window.Style，只能在控件Style或ControlTemplate里面设置，所以才觉得困难的，如果不是因为Valiadton.HasError是只读属性，我就可以用OneWayToSource将值绑定到Window.Tag里面了，唉

Answer 7

-->          如果不是因为Valiadton.HasError是只读属性，我就可以用OneWayToSource将值绑定到Window.Tag里面了

完全不懂！ 什么意思？ 什么叫绑定到Window.Tag里面？

你分享一下这个代码我看看，我觉得你仿佛理解有问题。

你现在假如他不是只读属性，你show一下你的实现方式我看看。

 

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Answer 8

  <Style x:Key="SuperT" TargetType="{x:Type lib:SuperTextBox}">
           
            <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self},Path=(Validation.Errors)[0].ErrorContent}"></Setter>
            <Setter Property="TempError" Value="{Binding RelativeSource={RelativeSource Self},Path=(Validation.HasError), Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"></Setter>
            <Setter Property="HasError" Value="{Binding RelativeSource={RelativeSource Self}, Path=TempError, UpdateSourceTrigger=PropertyChanged}"></Setter>

这里：

<Setter Property="Validation.HasError">
                <Setter.Value>
                    <Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type Window}}"
                                                                 Path="Tag" Mode="OneWayToSource" UpdateSourceTrigger="PropertyChanged">
                       
                    </Binding>
                </Setter.Value>
</Setter>

</Style>

Answer 9

我发现你这个TempError属性不是已经显示了HasError的值了么？

如果你希望Validation。HasError不是只读的，那你就用这个TempError属性不可以么？

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Sheldon _Xiao[MSFT]
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Answer 10

不好意思，有点事回复的慢了，你是指：
<Setter Property="TempError">
                <Setter.Value>
                    <Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type Window}}"
                                                                 Path="Tag" Mode="OneWayToSource" UpdateSourceTrigger="PropertyChanged">
                       
                    </Binding>吗？
可是这样的话TempError就是使用了两次Binding了，无效了，控件的一个属性绑定两次，他会都有用吗，我的TempError是要从Validation.HasError那里绑定来的哇

Answer 11

呵呵 恐怕在Style里面去完成你这样的事情是不可以的了， 你只能去想想其他办法了。

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Sheldon _Xiao[MSFT]
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Answer 12

嗯，谢谢你的回答哦~