.NET ArrayList 的排序的使用

ArrayList 的排序的使用

 

如:一个ArrayList(MyList) 保存的是多个员工EmployeeInfo对象,EmployeeInfo中有age(年龄)这样的属性, 对MyList进行按年龄排序?

 

 

写了个小例子，和大家一块分享。有不足之处，望不吝指正!

 

 

代码如下：

 

 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; } } }

 

实现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(); } }

 

 

调用：

 

EmployeeInfo[] arra = new EmployeeInfo[] { new EmployeeInfo("张三", 58), new EmployeeInfo("李四", 26), new EmployeeInfo("王五", 71), new EmployeeInfo("赵六", 19) }; Array.Sort(arra, Mycomparator.sortAgeAscending()); string arr = null; foreach(EmployeeInfo obj in arra) { arr += obj._Name + obj._Age + "<br />"; } Response.Write(arr);