c# 索引器重载_C＃中的索引器重载

╰+攻爆jí腚メ 2023-03-05 12:35 98阅读 0赞

c\# 索引器重载

**Prerequisite:** [Indexers in C\#][Indexers in C]

**先决条件：** [C＃中的索引器][Indexers in C]

We can **overload indexers in C\#**. We can declare **indexers** with multiple arguments and every argument have different data-types. It is not compulsory that indexes must be integer type. Indexes can be different types like string.

我们可以**在C＃中重载索引器** 。 我们可以声明带有多个参数的**索引器** ，并且每个参数都具有不同的数据类型。 索引必须为整数类型不是强制性的。 索引可以是不同的类型，例如字符串。

**Example:**

**例：**

using System;
    using System.Collections;
    namespace ConsoleApplication1
    {
        
        
        class Names
        {
        
            static public int len=10;
            private string []names = new string[len]    ;
    
    
            public Names()
            {
        
                for (int loop = 0; loop < len; loop++)
                    names[loop] = "N/A";
            }
            public string this[int ind]
            {
        
                get
                {
        
                    string str;
                    if (ind >= 0 && ind <= len - 1)
                        str = names[ind];
                    else
                        str = "...";
                    return str;
                }
    
                set
                {
        
                    if (ind >= 0 && ind <= len - 1)
                        names[ind]=value;
                }
            }
    
            public int this[string name]
            {
        
                get
                {
        
                    int ind=0;
    
                    while (ind < len)
                    {
        
                        if (names[ind] == name)
                            return ind;
                        ind++;
                    }
                    return ind;
                }
            }
        }
    
        class Program
        {
        
            static void Main()
            {
        
                Names names = new Names();
    
                names[0] = "Duggu";
                names[1] = "Shaurya";
                names[2] = "Akshit";
                names[3] = "Shivika";
                names[4] = "Veer";
    
                //first indexer
                for (int loop = 0; loop < Names.len; loop++)
                {
        
                    Console.WriteLine(names[loop]);
                }
    
                //second indexer
                Console.WriteLine("Index : "+names["Shaurya"]);
    
            }
        }
    }

**Output**

**输出量**

Duggu
        Shaurya
        Akshit
        Shivika
        Veer
        N/A
        N/A
        N/A
        N/A
        N/A
        Index : 1

> 翻译自: [https://www.includehelp.com/dot-net/indexer-overloading-in-c-sharp.aspx][https_www.includehelp.com_dot-net_indexer-overloading-in-c-sharp.aspx]

c\# 索引器重载

[Indexers in C]: https://www.includehelp.com/dot-net/indexers-in-c-sharp.aspx
[https_www.includehelp.com_dot-net_indexer-overloading-in-c-sharp.aspx]: https://www.includehelp.com/dot-net/indexer-overloading-in-c-sharp.aspx