在C#中获取属性的名称 [英] Getting the name of a property in c#

问题描述

提供此类:

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

如何在代码中提取 MyProperty 的名称?

How will I be able to extract the name of MyProperty in code?

例如，我能够获得这样的类的名称

For example, I am able to get the name of the class like this

typeof(MyClass).Name

如何为该物业做类似的事情?

How can I do something similar for the property?

这个问题的原因是我希望这个特定的代码能够抵抗名称的重构.

The reason for the question is that I want this particular code to be resistant against refactorizations of the names.

具有抗性，我的意思是我希望面对属性名称的更改，调用站点上的代码要健壮.我有一些使用属性名称的字符串表示形式的东西.对不起，措辞不好.我没有包含呼叫站点代码是为了保持问题的清洁度，并且没有使您陷入有关呼叫站点代码性质的其他讨论中.

With resistant I mean that I want the code at the call site to be robust in the face of changes of the propertyname. I have some stuff that is using a string representation of the property name. Sorry for the poor phrasing. I did not include call site code in order to keep the problem clean and not wander off into other discussions on the nature of the call site code.

推荐答案

您可以使用编译器生成的表达式树来做到这一点:

You do it like this, using compiler generated expression trees:

public static string GetMemberName<T, TValue>(Expression<Func<T, TValue>> memberAccess)
{
    return ((MemberExpression)memberAccess.Body).Member.Name;
}

现在从代码中调用静态方法:

Now call the static method from code:

class MyClass
{
    public int Field;
    public string Property { get; set; }
}

var fieldName = GetMemberName((MyClass c) => c.Field);
var propertyName = GetMemberName((MyClass c) => c.Property);
// fieldName has string value of `Field`
// propertyName has string value of `Property`

您现在还可以使用重构来重命名该字段，而无需破坏此代码

You can now also use refactoring to rename that field without breaking this code

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