无法将绑定设置为驻留在 TextBlock 中的运行

发布于 2024-10-08 11:10:37 字数 555 浏览 5 评论 0原文

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    DataContext="This is my text">
  <TextBlock>
    <Run Text="{Binding}"/>
  </TextBlock>
</Window>

抛出 InvalidOperationException：“双向绑定需要 Path 或 XPath。”

指定 Mode=OneWay 会导致奇怪的编译器错误：

标记“Binding”在 XML 命名空间“http://schemas.microsoft.com/winfx/2006/xaml”中不存在/presentation'.

有什么 xamly 方法可以解决这个问题吗？

原文

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    DataContext="This is my text">
  <TextBlock>
    <Run Text="{Binding}"/>
  </TextBlock>
</Window>

Throws InvalidOperationException: "Two-way binding requires Path or XPath."

Specifying Mode=OneWay, leads to a weird compiler error:

The tag 'Binding,' does not exist in XML namespace 'http://schemas.microsoft.com/winfx/2006/xaml/presentation'.

Is there any xamly way to fix this?

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吹泡泡o 2024-10-15 11:10:37

我还没有找到原因，但这是你可以做到这一点而不会变得太尴尬的方法：

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    DataContext="This is my text">
  <TextBlock>
    <Run Text="{Binding Path=.}"/>
  </TextBlock>
</Window>

由于某种原因

<Run Text="{Binding}" />

导致运行时错误，但事实

<Run Text="{Binding Path=.}" />

并非如此。原因可能与当您对绑定“不明确”时有关，有某些后备行为会接管解释您的绑定。或者，这可能是一个真正的 MS Bug，它在 Run 控件上解释 {Binding}。

I have not found a reason why, but this is how you can do it without it getting too awkward:

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    DataContext="This is my text">
  <TextBlock>
    <Run Text="{Binding Path=.}"/>
  </TextBlock>
</Window>

For some reason

<Run Text="{Binding}" />

causes the runtime error, but

<Run Text="{Binding Path=.}" />

does not. The reason might have something to do with when you are "ambiguous" with your bindings, there are certain fallback behaviors that take over to interpret your binding. Or perhaps, this is a genuine MS Bug with interpreting {Binding} on the Run control.

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雪落纷纷 2024-10-15 11:10:37

发现了一个奇怪的解决方法：

<Window
  x:Name="Me"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  DataContext="This is my text">
  <TextBlock>
    <Run Text="{Binding DataContext, ElementName=Me}"/>
  </TextBlock>
</Window>

Found a weird workarond:

<Window
  x:Name="Me"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  DataContext="This is my text">
  <TextBlock>
    <Run Text="{Binding DataContext, ElementName=Me}"/>
  </TextBlock>
</Window>

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~没有更多了~