C#中关于在List集合类中使用泛型的例子

示例如下：

#region Using directivesusing System;using System.Collections.Generic;using System.Text;#endregionnamespace ListDemo{public class FindRacer{private string car;public FindRacer(string car){this.car = car;}public bool DrivingCarPredicate(Racer racer){return racer.Car == car;}}public class RacerComparer : IComparer<Racer>{public enum CompareType{Name,Car}private CompareType compareType;public RacerComparer(CompareType compareType){this.compareType = compareType;}#region IComparer<Racer> Memberspublic int Compare(Racer x, Racer y){int result = 0;switch (compareType){case CompareType.Name:result = x.Name.CompareTo(y.Name);break;case CompareType.Car:result = x.Car.CompareTo(y.Car);break;}return result;}#endregion}public class Person{private string firstname;public string Firstname{get{return firstname;}set{firstname = value;}}private string lastname;public string Lastname{get{return lastname;}set{lastname = value;}}public Person(string firstname, string lastname){this.firstname = firstname;this.lastname = lastname;}public override string ToString(){return firstname + " " + lastname;}}public class Racer{private string name;public string Name{get{return name;}}private string car;public string Car{get{return car;}}public Racer(string name, string car){this.name = name;this.car = car;}public override string ToString(){return name;}}class Program{static void Main(string[] args){List<Racer> racers = new List<Racer>();racers.Add(new Racer("Michael Schumacher", "Ferrari"));racers.Add(new Racer("Juan Pablo Montoya", "McLaren-Mercedes"));racers.Add(new Racer("Kimi Raikkonen", "McLaren-Mercedes"));racers.Add(new Racer("Mark Webber", "Williams-BMW"));racers.Add(new Racer("Rubens Barichello", "Ferrari")); foreach (Racer racer in racers) { Console.WriteLine(racer); } Console.WriteLine("----------------------------------------------------"); //查找元素 FindRacer finder = new FindRacer("Ferrari"); foreach (Racer racer in racers.FindAll(new Predicate<Racer>(finder.DrivingCarPredicate))) { Console.WriteLine(racer); } Console.WriteLine("----------------------------------------------------"); //委托 racers.ForEach(delegate(Racer r) { Console.WriteLine(r); }); Console.WriteLine("----------------------------------------------------"); racers.FindAll(new Predicate<Racer>(finder.DrivingCarPredicate)). ForEach(delegate(Racer r) { Console.WriteLine(r); }); Console.WriteLine("----------------------------------------------------"); //排序 //匿名方法比较 //racers.Sort(delegate(Racer r1, Racer r2) { return r1.Name.CompareTo(r2.Name); }); racers.Sort(new RacerComparer(RacerComparer.CompareType.Car)); Console.WriteLine("/nSorted"); racers.ForEach(delegate(Racer r) { Console.WriteLine(r); }); Console.WriteLine("----------------------------------------------------"); //类型转换 List<Person> persons = racers.ConvertAll<Person>(delegate(Racer r) { int ixSeperator = r.Name.LastIndexOf(' ') + 1; string lastname = r.Name.Substring(ixSeperator, r.Name.Length - ixSeperator); string firstname = r.Name.Substring(0, ixSeperator - 1); return new Person(firstname, lastname); }); Console.WriteLine("Persons"); persons.ForEach(delegate(Person p) { Console.WriteLine(p); }); Console.ReadLine();}}}

 

注意：

Predicate 泛型委托：表示定义一组条件并确定指定对象是否符合这些条件的方法。

 

资料：

http://msdn.microsoft.com/zh-cn/library/bfcke1bz%28v=VS.80%29.aspx

http://blog.sina.com.cn/s/blog_5421dfd20100fhn0.html