反思：从的PropertyInfo获取字段信息 [英] Reflection: Get FieldInfo from PropertyInfo

问题描述

我正在做使用反射一些动态代码生成，我已经遇到一个情况，我需要得到一个属性的支持字段，以利用其字段信息对象（如果有的话）。

I'm doing some dynamic code generation using Reflection, and I've come across a situation where I need to get the backing field of a property (if it has one) in order to use its FieldInfo object.

现在，我知道你可以使用

Now, I know you can use

.IsDefined(typeof(CompilerGeneratedAttribute), false);

这是一个字段信息，发现无论是自动生成的，所以我想有一个为属性类似的事情而自动生成领域？

on a FieldInfo to discover whether it's autogenerated, so I assume there's a similar thing for Properties which auto-generate fields?

干杯，埃德

推荐答案

的<$ C房产$ C>获得_ 和集_ 方法也得到了 CompilerGeneratedAttributed 适用于他们。虽然没有通过属性不强耦合，有用于自动属性支持字段的命名约定：

The get_ and set_ methods for properties also get the CompilerGeneratedAttributed applied to them. While there is no strong coupling through attributes, there is a naming convention used for the backing fields of an auto property:

public string Foo { get; set;}

生成一个私人字符串<富> k__BackingField 成员（即< 和> 这里是名称的一部分，因为他们是合法的在IL中但不是在C＃。他们没有什么泛型做）

Produces a private string <Foo>k__BackingField member (the < and > here are part of the name, as they're legal in IL but not in C#; they have nothing to do with generics).

作为一个例子，这将在一类得到的所有汽车的属性的列表，连同他们的支持领域：

As an example, this will get a list of all of the auto properties in a class, along with their backing fields:

t.GetProperties().Where(p => 
    (p.GetGetMethod() ?? p.GetSetMethod()).IsDefined(typeof(CompilerGeneratedAttribute), false))
   .Select(p => new 
   { 
      Property = p, 
      Field = t.GetField(string.Format("<{0}>k__BackingField", p.Name),
          System.Reflection.BindingFlags.NonPublic | 
          System.Reflection.BindingFlags.Instance) 
   });

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