![](http://image31.360doc.com/DownloadImg/2011/06/2715/13438826_1.gif)
Code
using System;
using System.Collections.Generic;
using System.Text;
namespace Example04
{
#region 基類,抽象類
public abstract class BaseClass
{
//抽象屬性,同時(shí)具有g(shù)et和set訪問器表示繼承類必須將該屬性實(shí)現(xiàn)為可讀寫
public abstract String Attribute
{
get;
set;
}
//抽象方法,傳入一個(gè)字符串參數(shù)無返回值
public abstract void Function(String value);
//抽象事件,類型為系統(tǒng)預(yù)定義的代理(delegate):EventHandler
public abstract event EventHandler Event;
//抽象索引指示器,只具有g(shù)et訪問器表示繼承類必須將該索引指示器實(shí)現(xiàn)為只讀
public abstract Char this[int Index]
{
get;
}
}
#endregion
#region 繼承類
public class DeriveClass : BaseClass
{
private String attribute;
public override String Attribute
{
get
{
return attribute;
}
set
{
attribute = value;
}
}
public override void Function(String value)
{
attribute = value;
if (Event != null)
{
Event(this, new EventArgs());
}
}
public override event EventHandler Event;
public override Char this[int Index]
{
get
{
return attribute[Index];
}
}
}
#endregion
class Program
{
static void OnFunction(object sender, EventArgs e)
{
for (int i = 0; i < ((DeriveClass)sender).Attribute.Length; i++)
{
Console.WriteLine(((DeriveClass)sender)[i]);
}
}
static void Main(string[] args)
{
DeriveClass tmpObj = new DeriveClass();
tmpObj.Attribute = "1234567";
Console.WriteLine(tmpObj.Attribute);
//將靜態(tài)函數(shù)OnFunction與tmpObj對象的Event事件進(jìn)行關(guān)聯(lián)
tmpObj.Event += new EventHandler(OnFunction);
tmpObj.Function("7654321");
Console.ReadLine();
}
}
}