泛型List使用示例

代码来源于"c#高级编程(第4版)"，略作修改

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(" ----------FindAll Method Demo------------- ");

            //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(" ----------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(" ----------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