c# - nameof in attribute

Question

Considering Myatt attribute and MyObj class, it is somehow strange that ObjName property is known in scope of Myatt attribute. Isn't it?

[AttributeUsage(AttributeTargets.Property)]
public class MyAtt : Attribute
{
    public MyAtt(string name)
    {
        this.Name = name;
    }

    public string Name
    {
        get; set;
    }
}

public class MyObj
{
    [MyAtt(nameof(ObjName))] //Can access to ObjName?!
    public int ObjID
    {
        get;
        set;
    }

    public string ObjName
    {
        get;
        set;
    }
}

Update :

Sorry, I'm wondering why the first case is not possible and the second is possible.

1. [MyAtt(nameof(this.ObjName))] 
2. [MyAtt(nameof(ObjName))] 

I get it now. Thanks.

Answer 1

那里支持它很好，不是吗？所以不，这并不奇怪。

文档提到了一个Attribute示例作为关键用例：

[DebuggerDisplay("={" + nameof(GetString) + "()}")]  
class C {  
    string GetString() { }  
}  

Answer 2

如果您将nameof(...)其视为语法糖，那么这并不奇怪-您的属性需要一个字符串，并且编译器会在编译时计算出该字符串（考虑到由于重构而导致的任何重命名）