使用接口排序(2)

using System;
using System.Collections;
public enum enuSortOrder
{IDAsc, IDDesc, RankAsc, RankDesc}
public class Person : IComparable
{
public static enuSortOrder intSortOrder = enuSortOrder.IDAsc;
public int ID;
public string Rank;
public Person(int id, string rank)
{ this.ID=id; this.Rank = rank; }
#region IComparable Members
/*
* IComparable 接口只有一个方法: CompareTo。CompareTo方法
* 只接收一个object类型的参数，这意味着它可以接收任何类
* 型的数据（object是所有类的父类），这个方法会返回一
* 整型数值，含义如下：
*
* 1) 小于零，当前实例（this）小于obj对象
* 2) 等于零，当前实例（this）等于obj对象
* 3) 大于零，当前实例（this）大于obj对象
*
* Int32,Int16...,String,Decimal等数据类型都已经实现了IComparable接口
*/
public int CompareTo(object obj)
{
Person p = (Person)obj;
switch ((int)intSortOrder)
{
case (int)enuSortOrder.IDAsc:
return this.ID.CompareTo(p.ID);
case (int)enuSortOrder.IDDesc:
return p.ID.CompareTo(this.ID);
case (int)enuSortOrder.RankAsc:
return RankCompare(this.Rank, p.Rank);
case (int)enuSortOrder.RankDesc:
return RankCompare(p.Rank, this.Rank);
default:
return this.ID.CompareTo(p.ID);
}
}
private int RankCompare(string rank1, string rank2)
{
int intRank1 = ConvertRankToInt(rank1);
int intRank2 = ConvertRankToInt(rank2);
if(intRank1 < intRank2)
return -1;
else if(intRank1 == intRank2)
return 0;
else
return 1;
}
private int ConvertRankToInt(string rank)
{
if(rank == "司令")
return 8;
else if(rank == "军长")
return 7;
else if(rank == "师长")
return 6;
else if(rank == "旅长")
return 5;
else if(rank == "团长")
return 4;
else if(rank == "营长")
return 3;
else if(rank == "连长")
return 2;
else
return 1;
}
#endregion
}
class SortArrayList
{
static void Main(string[] args)
{
ArrayList list = new ArrayList();
list.Add(new Person(6, "排长"));
list.Add(new Person(3, "团长"));
list.Add(new Person(4, "司令"));
list.Add(new Person(5, "旅长"));
list.Add(new Person(7, "连长"));
list.Add(new Person(1, "军长"));
list.Add(new Person(2, "营长"));
list.Add(new Person(8, "师长"));
list.Sort();
Console.WriteLine("Sort By ID Asc:");
foreach (Person person in list)
{
Console.WriteLine("ID: " + person.ID.ToString() + ", Rank: " + person.Rank);
}
Console.WriteLine("----------------------------");
Console.WriteLine("Sort By ID Desc:");
Person.intSortOrder = enuSortOrder.IDDesc;
list.Sort();
foreach (Person person in list)
{
Console.WriteLine("ID: " + person.ID.ToString() + ", Rank: " + person.Rank);
}
Console.WriteLine("----------------------------");
Console.WriteLine("Sort By Rank Asc:");
Person.intSortOrder = enuSortOrder.RankAsc;
list.Sort();
foreach (Person person in list)
{
Console.WriteLine("ID: " + person.ID.ToString() + ", Rank: " + person.Rank);
}
Console.WriteLine("----------------------------");
Console.WriteLine("Sort By Rank Desc:");
Person.intSortOrder = enuSortOrder.RankDesc;
list.Sort();
foreach (Person person in list)
{
Console.WriteLine("ID: " + person.ID.ToString() + ", Rank: " + person.Rank);
}
}
}