在不知道类型参数的情况下获取通用成员名称作为字符串 [英] Get a generic's member names as strings without knowing the type parameters

问题描述

我正在使用反射来获取一些成员名称作为字符串.我使用的方法是在Google代码上(但我对它所使用的反射/LINQ魔术并不十分了解):

I'm using reflection to get some member names as strings. I'm using a method I found on Google Code (but I don't have a strong grasp of the reflection/LINQ magic it uses):

public static class MembersOf<T> {
    public static string GetName<R>(Expression<Func<T,R>> expr) {
        var node = expr.Body as MemberExpression;
        if (object.ReferenceEquals(null, node)) 
            throw new InvalidOperationException("Expression must be of member access");
        return node.Member.Name;
    }
}

这在静态构造函数中很好用.我只是这样使用它:

This works great in static constructors. I just use it like this:

using ClassMembers = MembersOf<MyClass>;

class MyClass
{
    public int MyProperty { get; set; }

    static MyClass
    {
        string lMyPropertyName = ClassMembers.GetName(x => x.MyProperty);
    }
}

使用这种方法，可以避免在字符串文字中拼写错误的成员名称，并且可以使用自动重构工具.实现 INotifyPropertyChanged 时很高兴！

With this approach you avoid misspelling member names in string literals and can use automatic refactoring tools. It's nice to have when implementing INotifyPropertyChanged!

但是现在我有一个通用类，希望以相同的方式使用，并且

But now I have a generic class that I want to use in the same manner, and I've learned that you can't use unbound types as generic type parameters:

using ClassMembers = MembersOf<MyGeneric<>>;

class MyGeneric<T> { }

解决此问题的一种好方法是什么?

What would be a good way to work around this problem?

推荐答案

最好的方法是忘记 using 指令，而直接使用该类:

The best way would be to forget the using directive and just use the class directly:

string propName = MembersOf<MyGeneric<T>>.GetName(x => x.SomeProp);

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