如何访问const变量？ [英] How to access const variable ?

问题描述

当我运行此代码时，我得到的ClassA不存在。我如何访问const int aaa？

code

when i run this code i get ClassA does not exists. how do i access const int aaa ?
code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace const2
{
    public class ClassA
    {
        public const int aaa = 10;
    }

    class Program
    {
        static void Main(string[] args)
        {
            ClassA classaa = new ClassA();

            Console.WriteLine(classA.aaa);
            Console.ReadKey();
        }
    }
}

推荐答案

这里有一些问题：主要是做C＃区分大小写：classA与ClassA不同，因此您无法在不获取类名的情况下访问 const 值：

There are a few things wrong here: mainly to do with C# being case sensitive: "classA" is not the same as "ClassA", so you can't access the const value without getting the class name right:

ClassA classaa = new ClassA();
Console.WriteLine(ClassA.aaa);

因为它是 const 值，它是隐式静态 - 所以你不能通过类实例访问它，只能通过类名。因此，您声明的实例是不必要的，因为这也不会起作用：

Because it is a const value, it is implicitly static - so you can't access it via a class instance, only via the class name. So the instance you declare is unnecessary, as this won't work either:

ClassA classaa = new ClassA();
Console.WriteLine(classaa.aaa);

拼写错误，第一个字符是大写的

spell error, first char is in uppercase

Console.WriteLine(ClassA.aaa);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace const2
{
    public static class ClassA
    {
        public const int aaa = 10;
    }
 
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(aaa);
        }
    }
}

未经测试，但准确访问常量。

Untested, but accurate for accessing the const.

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