asp.net2.0中的collections 和lists-ArrayList-优快云博客

本文通过一个具体实例展示了如何使用ArrayList来简化对对象集合的操作，包括添加、排序、查找等，并对比了与传统Array操作的区别。

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前面讲过了Array,现在讲一下ArrayList

前面再array里面我们要写很多东西才能让Array搞定。现在呢ArrayList天生就支持Add,Insert,Remove,Sort,BinarySearch 牛啊。

以前讲Array的代码就（http://blog.youkuaiyun.com/xiong1000/archive/2006/07/13/914762.aspx）变得简单了

现在用ArrayList代码就变为

using System;

using System.Collections;

public partial class_Default:System.Web.UI.Page

{

proteced void Page_Loade(object sender,EventArgs e)

{
 person jimmy = new person("jimmy", "zeng");
 person stone = new person("stone", "wang");
 person helen = new person("Helen", "liu");

 ArrayList people = new ArrayList();
 people.Add(jimmy);
 people.Add(stone);
 people.Add(helen);

 Response.Write("using the foreach.unsorting ");
 foreach( person p in people)
 {
 Response.Write(p.FullName +" ");
 }

 people.Sort();
 Response.Write("using the foreach.sorted ");
 foreach( person p in people)
 {
 Response.Write(p.FullName +" ");
 }

 person jimmy2 = new person("jimmy","zeng");
 int indexofjimmy2 = people.IndexOf(jimmy2);
 Response.Write("Jimmy2 is at "+indexofjimmy2+" ");

 int indexofsamejimmy = people.BinarySearch(jimmy2);
 Response.Write("The Equivalent jimmy is at"+indexofsamejimmy+" ");



 }

}