有没有办法跟踪代码中的绑定？ [英] Is there a way to follow a binding in code?

问题描述

如果我有一个Binding，它有一个属性路径，数据源可以在代码中执行，找到值？

If i have a Binding which has a property path and the data source can i execute it in code, to find the value?

我正在尝试的路径跟踪可能会相当复杂，包括收集查找和多个级别。

The path that i am trying to follow can be quite complicated, including collection lookup and multiple levels.

有一个黑客：

创建一个内容控件
使用BindingOperations.SetBinding（）

create a content control use BindingOperations.SetBinding()

然后检索内容

是否有更好的方式？

推荐答案

您可以避免使用 ContentControl 您自己的非常简单的类直接从 DependencyObject 派生，并提供了一个单独的 DependencyProperty ，然后您可以使用捆绑。除此之外，不，没有什么更好的方法 - WPF中的绑定机制与依赖属性的概念非常相关，绑定不能真正成为刚刚评估的独立表达式。

You can avoid using a ContentControl, and write your own very simple class that derives directly from DependencyObject, and provides a single DependencyProperty, which you can then target with the binding. Aside from that, no, there isn't any better way - binding machinery in WPF is very much tied into the concept of dependency properties, and a binding cannot really be a "free-standing expression" that is just evaluated.

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