c# - Silverlight 中的依赖属性

Question

我读了又读了 silverlight 中的依赖属性，但我仍然没有看到它的重要性。有人可以非常简单地向我解释什么是依赖属性以及您何时需要它以及为什么需要它吗？

Answer 1

这是 Dependency Property Overview on MSDN 的摘录，这应该比我以往任何时候都更优雅地回答你的问题:

The purpose of dependency properties is to provide a way to compute the value of a property based on the value of other inputs. These other inputs might include system properties such as themes and user preference, just-in-time property determination mechanisms such as data binding and animations/storyboards, multiple-use templates such as resources and styles, or values known through parent-child relationships with other elements in the element tree. In addition, a dependency property can be implemented to provide self-contained validation, default values, callbacks that monitor changes to other properties, and a system that can coerce property values based on potentially runtime information. Derived classes can also change some specific characteristics of an existing property by overriding dependency property metadata, rather than overriding the actual implementation of existing properties or creating new properties.

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