.NET ArrayList 的排序的使用

如:一個ArrayList(MyList) 保存的是多個員工EmployeeInfo對象,EmployeeInfo中有age(年齡)這樣的屬性, 對MyList進行按年齡排序?

 

public class EmployeeInfo
{
    public String _Name;
    public int _Age;
    public EmployeeInfo(String _Name, int _Age)
    {
        this._Name = _Name;
        this._Age = _Age;
    }

    public string Name
    {
        get { return _Name; }
        set { _Name = value; }
    }

    public int Age
    {
        get { return _Age; }
        set { _Age = value; }
    }
}

 

實現ICompare接口；

using System;
using System.Collections;
using System.Reflection;

public class Mycomparator : IComparer
{
    public Mycomparator(){ }

    int IComparer.Compare(Object o1, Object o2)
    {
        EmployeeInfo e1 = (EmployeeInfo)o1;
        EmployeeInfo e2 = (EmployeeInfo)o2;
        if (e1.Age < e2.Age)
            return 1;
        else if (e1.Age > e2.Age)
            return -1;
        else
            return 0;
    }

    public static IComparer sortAgeAscending()
    {
        return (IComparer)new Mycomparator();
    }
}
3。 具體使用

EmployeeInfo[] arra = new EmployeeInfo[]
{
    new EmployeeInfo("張三", 58),
    new EmployeeInfo("李四", 26),
    new EmployeeInfo("王五", 71),
    new EmployeeInfo("趙六", 19)
};

       
Array.Sort(arra, Mycomparator.sortAgeAscending());
string arr = null;
foreach(EmployeeInfo obj in arra)
{
    arr += obj._Name + obj._Age + "<br />";
}
Response.Write(arr);