Indexing with Multiple Parameters : Indexer « Class Interface « C# / C Sharp

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Indexing with Multiple Parameters
Indexing with Multiple Parameters

/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson

Publisher: Apress  L.P.
ISBN: 1-893115-62-3
*/
// 19 - Indexers and Enumerators\Indexing with Multiple Parameters
// copyright 2000 Eric Gunnerson
using System;

class Player
{
    string name;
    
    public Player(string name)
    {
        this.name = name;
    }
    
    public override string ToString()
    {
        return(name);
    }
}

class Board
{
    Player[,board = new Player[88];
    
    int RowToIndex(string row)
    {
        string temp = row.ToUpper();
        return((inttemp[0(int'A');
    }
    
    int PositionToColumn(string pos)
    {
        return(pos[1'0' 1);
    }
    
    public Player this[string row, int column]
    {
        get
        {
            return(board[RowToIndex(row), column - 1]);
        }
        set
        {
            board[RowToIndex(row), column - 1= value;
        }
    }    
    
    public Player this[string position]
    {
        get
        {
            return(board[RowToIndex(position),
            PositionToColumn(position)]);
        }
        set
        {
            board[RowToIndex(position),
            PositionToColumn(position)] = value;
        }
    }    
}

public class IndexingwithMultipleParameters
{
    public static void Main()
    {
        Board board = new Board();
        
        board["A"4new Player("White King");
        board["H"4new Player("Black King");
        
        Console.WriteLine("A4 = {0}", board["A"4]);
        Console.WriteLine("H4 = {0}", board["H4"]);
    }
}

           
       
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18.Return class object from indexer
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