在 C# 中缺少用于类型安全数据绑定的“nameof"运算符的解决方法? [英] Workaround for lack of 'nameof' operator in C# for type-safe databinding?

问题描述

很多人都认为在 C# 中包含 nameof 运算符.作为此运算符如何工作的示例，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.然后我需要将属性名称作为字符串.我希望它们是类型安全的.

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 中遇到过一个解决方法，它提供了 nameof 的功能并涉及 lambda 表达式.但是，我无法找到此解决方法.任何人都可以向我提供该解决方法吗?

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?

如果可能的话，我也对在 .NET 2.0 中实现 nameof 功能的方法感兴趣.

I am also interested in a way to implement the functionality of nameof in .NET 2.0 if that is possible.

推荐答案

这段代码基本上做到了:

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...)

这篇关于在 C# 中缺少用于类型安全数据绑定的“nameof"运算符的解决方法?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！