XAML 对 XPath 中 local-name() 的支持 [英] XAML support for local-name() in XPath

问题描述

我想绑定到我的 XmlDataProvider 中节点的元素名称.我似乎无法让 local-name() 在我的 XPath 表达式中工作.XAML 是否支持 local-name()?

I'd like to bind to the element name of a node in my XmlDataProvider. I can't seem to get local-name() to work within my XPath expression. Does XAML support local-name()?

<TextBlock Text="{Binding XPath=local-name()}" />

推荐答案

我一直在尝试做完全相同的事情，但我很确定它在一个步骤中不受支持.

I have been trying to do exactly the same thing and am pretty sure it is not supported in a single step.

Binding.XPath 帮助说XmlNode::SelectNodes 方法处理来自 XPath 属性的 XPath 表达式.不支持 XPath 函数.

The Binding.XPath help says The XmlNode::SelectNodes method handles the XPath expressions from the XPath property. XPath functions are not supported.

不过

您可以使用一些技巧来解决它 - 您需要一个围绕元素的容器来提供一个 DataContext，它是您的 XPath 的结果，然后您可以使用 Path 查询该上下文对象的 LocalName 属性，例如在我的工作示例中:

You can work around it using a bit of a hack - you need a container around the element to provide a DataContext which is the result of your XPath and then you can query the LocalName property of that context object using Path, such as in my working example:

<StackPanel Grid.Row="20" Grid.Column="1" 
    DataContext="{Binding XPath=r:Result/r:LIC1}">
    <TextBlock Text="{Binding Path=LocalName}" />
</StackPanel>

我最初试图实现的目标:

which I'd originally been trying to achieve with:

<TextBlock Grid.Row="20" Grid.Column="1" 
    Text="{Binding XPath=r:Result/r:LIC1/local-name\(\)}" /> 

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