C＃反思 - 从一个简单的类获取的字段值 [英] C# Reflection - Get field values from a simple class

问题描述

我有一个类：

class A {
    public string a = "A-val" , b = "B-val";
}

我想通过反射来打印对象的成员

//Object here is necessary.
Object data = new A();
FieldInfo[] fields = data.GetType().GetFields();
String str = "";
foreach(FieldInfo f in fields){
    str += f.Name + " = " + f.GetValue(data) + "\r\n";
}

下面是所期望的结果：

a = A-val
b = B-val

不幸的是这没有奏效。请帮忙，谢谢。

Unfortunately this did not work. Please help, thanks.

推荐答案

在固定摆脱错误（缺少分号和一个糟糕的变量名）时，code你已经发布的确实的工作 - 我只是尝试它和它没有任何问题表现出的名称和值

Once fixed to get rid of the errors (lacking a semi-colon and a bad variable name), the code you've posted does work - I've just tried it and it showed the names and values with no problems.

我的猜测是，在现实中，你要使用的不是公共领域。这code：

My guess is that in reality, you're trying to use fields which aren't public. This code:

FieldInfo[] fields = data.GetType().GetFields();

...只会得到的公共的领域。通常你需要指定你还需要非公共字段：

... will only get public fields. You would normally need to specify that you also want non-public fields:

FieldInfo[] fields = data.GetType().GetFields(BindingFlags.Public | 
                                              BindingFlags.NonPublic | 
                                              BindingFlags.Instance);

（我希望你不要的真正的有公共领域，毕竟...）

(I hope you don't really have public fields, after all...)

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