indexerdemo.cs

vc的原码例子12 vc的原码例子12

using System;

class Titles
{
	public Titles()
	{
		Contents = new String[25];

		for (int i = 0; i < Contents.Length; i++)
		   Contents[i] = null;

		length = 25;
	}

	public object this[int index]
	{
		set 
		{	 
			if ((index >= 0) && (index < Contents.Length))
				Contents[index] = value.ToString();
			else
				Contents[index] = null;
		}

		get
		{
			if ((index >= 0) && (index < Contents.Length))
				return Contents[index];
			else
				return(null);
		}   
	}

	private int length;

	public int Length 
	{
		get 
		{
			return(length);
		}
	}

	private string [] Contents;
}


class clsIndexerDemo
{
	public static void Main ()
	{
		Titles Books = new Titles();

		Books[0] = "Rescued by C#";
		Books[3] = "Jamsa's C/C++/C# Programmer's Bible";
		Books[10] = "Advanced C#";

		for (int i = 0; i < Books.Length; i++)
		  if (Books[i] != null)
            Console.WriteLine(Books[i]);
	}
}