Indexing with Multiple Parameters : Indexer « Class Interface « C# / C Sharp
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[8, 8];
int RowToIndex(string row)
{
string temp = row.ToUpper();
return((int) temp[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", 4] = new Player("White King");
board["H", 4] = new Player("Black King");
Console.WriteLine("A4 = {0}", board["A", 4]);
Console.WriteLine("H4 = {0}", board["H4"]);
}
}
