如何找出如果一个属性是一个自动实现的属性与反思？ [英] How to find out if a property is an auto-implemented property with reflection?

问题描述

所以，在我的情况下，我做发现使用反射类的结构。我需要能够找出是否一个属性是由PropertyInfo对象自动实现的属性。我认为反射API不会公开这样的功能，因为自动属性是C＃依赖，但没有任何解决方法，以获取这些信息？

So in my case i am doing discovery of the structure of a class using reflection. I need to be able to find out if a property is an auto-implemented property by the PropertyInfo object. I assume that the reflection API does not expose such functionality because auto-properties are C# dependent, but is there any workaround to get this information?

推荐答案

您可以检查，看看是否 GET 或设置法标有编译器生成属性。然后，您可以结合起来，与查找标有包含属性的名称和字符串BackingField的编译器生成属性的私有字段。

You could check to see if the get or set method is marked with the CompilerGenerated attribute. You could then combine that with looking for a private field that is marked with the CompilerGenerated attribute containing the name of the property and the string "BackingField".

也许

public static bool MightBeCouldBeMaybeAutoGeneratedInstanceProperty(
    this PropertyInfo info
) {
    bool mightBe = info.GetGetMethod()
                       .GetCustomAttributes(
                           typeof(CompilerGeneratedAttribute),
                           true
                       )
                       .Any();
    if (!mightBe) {
        return false;
    }


    bool maybe = info.DeclaringType
                     .GetFields(BindingFlags.NonPublic | BindingFlags.Instance)
                     .Where(f => f.Name.Contains(info.Name))
                     .Where(f => f.Name.Contains("BackingField"))
                     .Where(
                         f => f.GetCustomAttributes(
                             typeof(CompilerGeneratedAttribute),
                             true
                         ).Any()
                     )
                     .Any();

        return maybe;
    }

这不是欺骗的证据，很脆，很可能无法移植到，比方说，单声道。

It's not fool proof, quite brittle and probably not portable to, say, Mono.

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