代码来源于"c#高级编程(第4版)"，略作修改
代码语言：javascript复制using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
namespace Wrox.ProCSharp.VectorAsCollection
{
class MainEntryPoint
{
static void Main(string[] args)
{
List<Racer> racers = new List<Racer>();
racers.Add(new Racer("Michael Schumacher", "Ferriai"));
racers.Add(new Racer("Juan Pablo Montoya", "McLaren-Mercedes"));
racers.Add(new Racer("Kimi Railkkonen", "McLaren-Mercedes"));
racers.Add(new Racer("Mark Webber", "Williams-BMW"));
racers.Add(new Racer("Rubens Barichello", "Ferriai"));
//遍历List
foreach (Racer R in racers)
{
Console.WriteLine(R);
}
Console.WriteLine("n----------FindAll Method Demo-------------n");
//查找findAll
FindRacer finder = new FindRacer("Ferriai");
foreach (Racer r in racers.FindAll(new Predicate<Racer>(finder.DrivingCarPredicate)))//Predicate是一个泛型的委托
//foreach (Racer r in racers.FindAll(new Predicate<Racer>(FindFerriai)))//就本例而言，查找开Farriai的Racer，也可以这样写，但这样不灵活，没办法将参数传入委托
{
Console.WriteLine(r);
}
Console.WriteLine("n----------Find Method Demo-------------");
//Find方法(若找到的结果不止一条时，显示第一条)
FindRacer f2 = new FindRacer("McLaren-Mercedes");
Racer R2 = racers.Find(new Predicate<Racer>(f2.DrivingCarPredicate));
if (R2 != null)
{
Console.WriteLine(R2);
}
else
{
Console.WriteLine("No racer drive McLaren-Mercedes ");
}
Console.WriteLine("n----------FindLast Method Demo-------------");
FindRacer f3 = new FindRacer("McLaren-Mercedes");
Racer R3 = racers.FindLast(new Predicate<Racer>(f2.DrivingCarPredicate));
if (R3 != null)
{
Console.WriteLine(R3);
}
else
{
Console.WriteLine("No racer drive McLaren-Mercedes ");
}
Console.ReadLine();
}
//static bool FindFerriai(Racer R)
//{
// return R.Car == "Ferriai";
//}
}
/**/
/// <summary>
/// 查找Racer的类(根据car查找)
/// </summary>
public class FindRacer
{
private string _car;
public FindRacer(string car)
{
this._car = car;
}
public bool DrivingCarPredicate(Racer r)
{
return r.Car == _car;
}
}
/**/
/// <summary>
/// Racer类
/// </summary>
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 "," _car;
}
}
}运行结果:
Michael Schumacher,Ferriai Juan Pablo Montoya,McLaren-Mercedes Kimi Railkkonen,McLaren-Mercedes Mark Webber,Williams-BMW Rubens Barichello,Ferriai
----------FindAll Method Demo-------------
Michael Schumacher,Ferriai Rubens Barichello,Ferriai
----------Find Method Demo------------- Juan Pablo Montoya,McLaren-Mercedes
----------FindLast Method Demo------------- Kimi Railkkonen,McLaren-Mercedes
