C#索引怎么用

小編給大家分享一下C#索引怎么用，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！

下面是貼出來的代碼：

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？

書上說它是一組get和set訪問器，我個人就直接這么認(rèn)為就是獲值或設(shè)值的概念。（可能是錯誤的啊，呵呵，理論太差，剛看的）。

怎樣聲明C#索引呢？

他的語法是如下：

要注意下面幾點：a：索引沒有名稱，它是通過關(guān)鍵字this。

b：參數(shù)列表在方括號里面。

c：參數(shù)列表至少必須聲明一個參數(shù)。

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

以上是“C#索引怎么用”這篇文章的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對大家有所幫助，如果還想學(xué)習(xí)更多知識，歡迎關(guān)注億速云行業(yè)資訊頻道！