为什么附加属性设置和获取静态方法不叫在XAML？ [英] Why attached property Set and Get static methods are not called in XAML?

问题描述

我已经在我的附加属性一些SetXXX和的getXXX静态方法设置断点。在XAML中，我已经赋值的附加属性。不过，我期待设置或获取静态方法被调用，但事实并非如此。附加属性按预期工作，如果我打电话一些SetXXX和的getXXX在code的方法，然后它的预期。

I have set break points on my attached properties SetXXX and GetXXX static methods. In Xaml, I have assigned values to the attached property. However, I was expecting the Set or Get static methods to be called but they are not. The attached property works as expected and if I call SetXXX and GetXXX methods in code, then it works are expected.

为什么不叫方法在XAML时设置？

Why are the methods not called when set from Xaml?

JD。

推荐答案

作为<一个href="http://stackoverflow.com/questions/2568860/why-attached-property-set-and-get-static-methods-are-not-called-in-xaml/2568868#2568868">JaredPar解释，当您使用XAML中，则getXXX / SetXXX方法不叫。

As JaredPar explained, when you use XAML, the GetXXX/SetXXX methods are not called.

我想补充一点，虽然：

如果您需要跟踪在code改变附加属性，你应该使用的元数据。您可以设置一个回调在元数据中火，当属性发生变化，并在code跟踪。

If you need to track changes to the Attached Property in code, you should use the Metadata. You can set a callback in the metadata to fire when the property changes, and track it in your code.

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