我可以创建一个只读的依赖属性吗?

I need this dependency property to be accessible for read operations only. Outside objects should not be able to assign values to it.

我需要这个依赖属性只对读取操作具有可访问性。外部对象不应该能够给它赋值。

2 个解决方案

#1

Yes, of course (think IsMouseOver for why read-only dependency properties should exist). MSDN has a great article on the subject.

是的，当然(考虑一下为什么要有只读依赖属性)。MSDN有一篇关于这个主题的好文章。

There are some issues implementing read-only dependency properties and in some situations they will not work. However, it is possible in some cases. For those cases, the following is a brief guide to implementing a readonly dependency property:

实现只读依赖项属性有一些问题，在某些情况下它们不能工作。然而，这在某些情况下是可能的。对于这些情况，以下是实现只读依赖项属性的简要指南:

Use RegisterReadOnly instead of Register.
使用RegisterReadOnly代替Register。
Do not expose a public set method in your wrapped property.
不要在已包装的属性中公开公共集方法。
The return value from RegisterReadOnly is of type DependencyPropertyKey (instead of the usual DependencyProperty). Store but do not expose this value.
RegisterReadOnly的返回值是类型DependencyPropertyKey(而不是通常的DependencyProperty)。存储但不要公开此值。

The linked article will give you the necessary details.

链接的文章将提供必要的细节。

#2

Yes, you can.

是的,你可以。

MSDN has an entire section describing how to define and use Read-Only Dependency Properties.

MSDN有一整节描述如何定义和使用只读依赖属性。

The main issue is to call DependencyProperty.RegisterReadOnly instead of Register. Also, if you create a property on the object to handle this, make sure to only implement a public getter in the property, and not a public setter.

主要问题是调用DependencyProperty。RegisterReadOnly代替注册。此外，如果您在对象上创建一个属性来处理此问题，请确保只在属性中实现公共getter，而不是公共setter。

#1