用C＃中的Reflection或类似代码（没有第三方库）替换Property Getter / Setter [英] Replace Property Getter/Setter with Reflection or similar (no 3rd party libraries) in c#

问题描述

例如，我有一个包含在类中的属性

I've got a property contained in a class for example

public class Greeter {
   private Hashtable _data;
   public string HelloPhrase { get; set; }

   public Greeter(data) {
      _data = data;
   }
}

我想做的是将一个属性添加到HelloPhrase属性，例如

What I would like to do is add an Attribute to the HelloPhrase property, like this

[MyCustomAttribute("Hello_Phrase")]
public string SayHello { get; set; }

这样，在构造函数期间，我可以对MyCustomAttribute具有的Class（Greeter）中的属性进行反思被定义并将属性的Get / Set方法设置为匿名方法/委托。

Such that during the constructor I can reflect over the Properties in the Class(Greeter) where MyCustomAttribute has been defined and set the Get/Set methods of the property to an anonymous method / delegate.

  public Greeter(data) {
      _data = data;
      ConfigureProperties();
   }

我设法从类中获取了PropertyInfo，但这仅公开了GetSetMethod （http://msdn.microsoft.com/zh-cn/library/system.reflection.propertyinfo.getsetmethod.aspx）和相应的GetGetMethod。

I've managed to get the PropertyInfo's from the class but this only exposes GetSetMethod (http://msdn.microsoft.com/en-us/library/system.reflection.propertyinfo.getsetmethod.aspx) and the corresponding GetGetMethod.

在这里和在线阅读一些问题，但找不到不使用某种Aspects库的答案。

I've read through some of the questions here and online but can't find an answer that doesn't use an Aspects library of some sort.

任何人都可以通过提供程序来设置在运行时获取/设置方法？理想情况下，对于

Could anyone provider pointers to setting the Get/Set methods at runtime? Ideally to a delegate like

x =>_data[keyDefinedByAttribute]; 

推荐答案

您不能执行此操作。您不能动态地换出属性getter和setter的实现。您可以获得的最接近的值是：

You can't do this. You cannot dynamically swap out the implementation of property getters and setters. The closest you can get are either:

1. 动态代理


2. AOP库

动态代理可能适合您，也可能不适合您，但是IMO我更喜欢使用解决方案而不是方面的解决方案。但是，动态行为将在代理类中出现（通过接口或通过动态子类化并覆盖您的虚拟属性）。

Dynamic proxies may or may not suit you, but IMO I'd much prefer a solution that uses that over aspects. However, the dynamic behavior will be surfaced in a proxy class (either of an interface or by dynamically subclassing and overriding your virtual properties.)

但是在任何情况下都没有任何东西例如 SetGetMethod 或 SetSetMethod 。

But under no circumstance is there anything like SetGetMethod or SetSetMethod.

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