C#索引怎么用

小编给大家分享一下C#索引怎么用，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

下面是贴出来的代码：

using System;   using System.Collections.Generic;   using System.Linq;   using System.Text;      namespace index   {           class Worker           {                   public string LastName;                   public string FirstName;                   public string MyBirth;                      public string this[int index]                   {                           set                           {                                   switch (index)                                   {                                           case 0: LastName = value;                                                   break;                                           case 1: FirstName = value;                                                   break;                                           case 2: MyBirth = value;                                                   break;                                           default:                                                   throw new ArgumentOutOfRangeException("index");                                                   break;                                   }                           }                           get                           {                                   switch(index)                                   {                                           case 0 : return LastName;                                           case 1 : return FirstName;                                           case 2 : return MyBirth;                                           default :                                                      throw new ArgumentOutOfRangeException("index");                                                   break;                                   }                                                                      }                   }           }           class Program           {                   static void Main(string[] args)                   {                           Worker a = new Worker();                           Console.WriteLine("print the value:{0},{1},{2}",a[0],a[1],a[2]);                           Console.WriteLine("please print your last name");                           a[0] = Console.ReadLine();                           Console.WriteLine("please print your first name");                           a[1] = Console.ReadLine();                           Console.WriteLine("please print your birthday");                           a[2] = Console.ReadLine();                           Console.WriteLine("Now,your name is {0},{1},and your birth is {2}",a[0],a[1],a[2]);                      }           }   }

首先什么是C#索引呢？

书上说它是一组get和set访问器，我个人就直接这么认为就是获值或设值的概念。（可能是错误的啊，呵呵，理论太差，刚看的）。

怎样声明C#索引呢？

他的语法是如下：

要注意下面几点：a：索引没有名称，它是通过关键字this。

b：参数列表在方括号里面。

c：参数列表至少必须声明一个参数。

ReturnType this [type param1,...]   {           get                   {                           ...                   }           set                   {                           ...                   }   }

以上是“C#索引怎么用”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注亿速云行业资讯频道！