51. 인덱서(Indexer)

==> 인덱서.cs


using System;

public class 인덱서
{
    public static void Main()
    {
        #region Car
  Car hyundai = new Car(3);
        hyundai[0] = "에쿠스";
        hyundai[1] = "소나타";
        hyundai[2] = "산타페";

        for (int i = 0; i < hyundai.Length; i++)
        {
            Console.WriteLine(hyundai[i]);
        }
 #endregion

        Person saram = new Person();
        // 문자열 인덱서
        saram["닉네임"] = "RedPlus";
        saram["주소"] = "Incheon";
        Console.WriteLine(saram["닉네임"]);
        Console.WriteLine(saram["주소"]);
    }
}



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==> Car.cs


using System;
//[1] Class
public class Car
{
    //[2] Property
    public int Length { get; set; }

    //[3] Constructor
    public Car()
    {
        // Empty
    }

    public Car(int length)
    {
        this.Length = length;
        catalog = new string[length]; // 요소수 생성
    }

    //[4] Field
    private string[] catalog; // 배열 생성
   

    //[5] Indexer
    public string this[int index]
    {
        get { return catalog[index]; }
        set { catalog[index] = value; }
    }

}



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==> Person.cs


using System;
using System.Collections;

public class Person
{
    //[1] 문자열 인덱서
    public string this[string index]
    {
        get { return (string)names[index]; }
        set { names[index] = value; }
    }

    //[2] Key/Value 저장 필드
    Hashtable names = new Hashtable();
}