使用反射获取私有财产的私有财产 [英] Get private property of a private property using reflection

问题描述

public class Foo
{
    private Bar FooBar {get;set;}

    private class Bar
    {
        private string Str {get;set;}
        public Bar() {Str = "some value";}
    }
 }

如果我有类似上面的东西并且我有一个对 Foo 的引用，我如何使用反射从 Foo 的 FooBar 中获取值 Str?我知道没有真正的理由去做这样的事情(或很少有方法)，但我认为必须有一种方法来做到这一点，但我不知道如何完成它.

If I've got something like the above and I have a reference to Foo, how can I use reflection to get the value Str out Foo's FooBar? I know there's no actual reason to ever do something like this (or very very few ways), but I figure there has to be a way to do it and I can't figure out how to accomplish it.

编辑是因为我在正文中问了错误的问题，与标题中的正确问题不同

edited because I asked the wrong question in the body that differs from the correct question in the title

推荐答案

您可以使用 GetProperty 方法以及 NonPublic 和 Instance 绑定标志.

You can use the GetProperty method along with the NonPublic and Instance binding flags.

假设你有一个 Foo 的实例，f:

Assuming you have an instance of Foo, f:

PropertyInfo prop =
    typeof(Foo).GetProperty("FooBar", BindingFlags.NonPublic | BindingFlags.Instance);

MethodInfo getter = prop.GetGetMethod(nonPublic: true);
object bar = getter.Invoke(f, null);

更新:

如果您想访问 Str 属性，只需对检索到的 bar 对象执行相同的操作:

If you want to access the Str property, just do the same thing on the bar object that's retrieved:

PropertyInfo strProperty = 
    bar.GetType().GetProperty("Str", BindingFlags.NonPublic | BindingFlags.Instance);

MethodInfo strGetter = strProperty.GetGetMethod(nonPublic: true);

string val = (string)strGetter.Invoke(bar, null);

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