C＃中缺少“nameof”运算符以进行类型安全数据绑定的解决方法？ [英] Workaround for lack of 'nameof' operator in C# for type-safe databinding?

问题描述

在C＃中包含一个 nameof 操作符已经有了很多的想法。作为这个操作符如何工作的例子， nameof（Customer.Name）将返回字符串Name。

There has been a lot of sentiment to include a nameof operator in C#. As an example of how this operator would work, nameof(Customer.Name) would return the string "Name".

我有一个域对象。我必须绑定它。而且我需要属性的名称作为字符串。我希望他们是类型安全的。

I have a domain object. And I have to bind it. And I need names of properties as strings then. And I want them to be type-safe.

我记得在.NET 3.5中遇到了一个解决方法，它提供了 nameof 并涉及lambda表达式。但是，我无法找到此解决方法。任何人都可以为我提供这种解决方法？

I remember coming across a workaround in .NET 3.5 which provided the functionality of nameof and involved lambda expressions. However, I have not been able to locate this workaround. Can anyone provide that workaround to me?

我也有兴趣实现 nameof 的功能

推荐答案

这段代码基本上是这样的：

This code basically does that:

class Program
{
    static void Main()
    {
        var propName = Nameof<SampleClass>.Property(e => e.Name);

        Console.WriteLine(propName);
    }
}

public class Nameof<T>
{
    public static string Property<TProp>(Expression<Func<T, TProp>> expression)
    {
        var body = expression.Body as MemberExpression;
        if(body == null)
            throw new ArgumentException("'expression' should be a member expression");
        return body.Member.Name;
    }
}

（当然是3.5代码...）

(Of course it is 3.5 code...)

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