HashText的应用

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;

public partial class _Default : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
 #region hashtable
 //Person zhang = new Person("张","三");
 //Person li = new Person("李", "四");
 //Person wang = new Person("王", "五");
 //Hashtable hash = new Hashtable();
 //hash.Add("zhang", zhang);
 //hash.Add("li", li);
 //hash.Add("wang", wang);
 ////hashtable中存储的键值对使用了DictionaryEntry结构体
 ////所以遍历是需要使用DictionaryEntry结构
 //foreach (DictionaryEntry p in hash)
 //{
 // Person pp = p.Value as Person;
 // Response.Write(pp.FirstName + pp.LastName + " ");
 //}
 //Response.Write("---------------- ");
 //foreach (Person p in hash.Values) //Values为Person的集合
 //{
 // Response.Write(p.FirstName + p.LastName + " ");
 //}
 #endregion
 #region sortedlist
 //Person zhang = new Person("张", "三");
 //Person li = new Person("李", "四");
 //Person wang = new Person("王", "五");
 //SortedList list = new SortedList();
 //list.Add("d", zhang);
 //list.Add("b", li);
 //list.Add("c", wang);
 //int index = list.IndexOfKey("d");
 //Response.Write(index + " ");
 //index = list.IndexOfValue(zhang);
 //Response.Write(index + " ");
 //Person p = (Person)list.GetByIndex(index);
 //Person pp = (Person)list["d"];
 #endregion
 #region Queue
 //Queue qu = new Queue();
 //qu.Enqueue("hello ");
 //qu.Enqueue("world ");
 //qu.Enqueue("!");
 //int nums = qu.Count;
 ////随着Dequeue的调用，队列的数量会减少，所以在循环
 ////中不能使用qu.Count控制循环的次数
 //for (int i = 0; i < nums; i++)
 // Response.Write(qu.Dequeue().ToString());
 //Response.Write("------------------ ");

 //foreach (string str in qu)
 //{
 // Response.Write(str);
 //}
 #endregion

        #region statck
        //Stack sk = new Stack();
        //sk.Push("hello ");
        //sk.Push("world ");
        //sk.Push("!");

//int nums = sk.Count;
 //for (int i = 0; i < nums; i++) //典型的后进先出结构
 //{
 // Response.Write(sk.Pop().ToString());
 //}
 #endregion

        #region 强类型列表
        //Person zhang = new Person("张", "三");
        //Person li = new Person("李", "四");
        //Person wang = new Person("王", "五");

        ////ArrayList list = new ArrayList();
        ////list.Add(zhang);
        ////list.Add(li);
        ////list.Add(wang);

        ////强类型列表，personlist中只能存储Person对象，使用时可以避免强制转换时出错
        ////2.0版本以后引入泛型概念，使用泛型列表可以解决这些问题
        //PersonList list = new PersonList();
        //list.Add(zhang);
        //list.Add(li);
        //list.Add(wang);

//for (int i = 0; i < list.Count; i++)
 //{
 // Response.Write(list[i].FirstName + list[i].LastName + " ");
 //}

#endregion

List<Person> list = new List<Person>();
 List<int> listi = new List<int>();
 List<string> lists = new List<string>();

}
}