c# - 绑定路径中的模板绑定

Question

我有一个Custom Controlwith 依赖属性Header。该Generic.xaml控件有一种样式。我想设置模板某些部分的可见性，以便它依赖于Header控件的属性。

<Style TargetType="{x:Type CustomControl1}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type CustomControl1}">
                <Grid MinWidth="400" Focusable="False">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                        <RowDefinition />
                    </Grid.RowDefinitions>

                    <TextBlock Text="{TemplateBinding Header}" 
                               Style="{DynamicResource SomeStyle}" 
                               Margin="0,0,80,0"
                               Grid.Row="0" Grid.Column="0">
                        <TextBlock.Visibility>



                            <Binding Path="{TemplateBinding Header}">

                            or alternatively

                            <Binding Path="{Binding Path=Header, RelativeSource={RelativeSource TemplatedParent}}">



                                <Binding.Converter>
                                    <converters:ValueConverterGroup>
                                        <converters:StringNullOrEmptyToBooleanConverter />
                                        <BooleanToVisibilityConverter />
                                    </converters:ValueConverterGroup>
                                </Binding.Converter>
                            </Binding>
                        </TextBlock.Visibility>
                    </TextBlock>

                   ...

此行引发异常：

<Binding Path="{Binding Path=Header, RelativeSource={RelativeSource TemplatedParent}}">

根据异常消息，Binding 的 Path 属性内不能有 Binding（我已经知道了）xD

没有双重绑定怎么能做到这一点？如何在不使用 TemplateBinding 的情况下访问自定义控件的属性？

Answer 1

Patha 的属性Binding不是 DependencyProperty，我怀疑您可能希望它是这样的：

<TextBlock.Visibility>
   <Binding Path="Header" RelativeSource="{RelativeSource TemplatedParent}">
          <Binding.Converter>
              <converters:ValueConverterGroup>
                   <converters:StringNullOrEmptyToBooleanConverter />
                    <BooleanToVisibilityConverter />
              </converters:ValueConverterGroup>
          </Binding.Converter>
   </Binding>
</TextBlock.Visibility>