泛型List<T>使用示例

代码来源于"c#高级编程(第4版)"，略作修改

  1using System;
  2using System.Collections;
  3using System.Collections.Generic;
  4using System.Text;
  5
  6
  7namespace Wrox.ProCSharp.VectorAsCollection
  8{
  9    class MainEntryPoint
10    {
11        static void Main(string[] args)
12        {
13
14            List<Racer> racers = new List<Racer>();
15            racers.Add(new Racer("Michael Schumacher", "Ferriai"));
16            racers.Add(new Racer("Juan Pablo Montoya", "McLaren-Mercedes"));
17            racers.Add(new Racer("Kimi Railkkonen", "McLaren-Mercedes"));
18            racers.Add(new Racer("Mark Webber", "Williams-BMW"));
19            racers.Add(new Racer("Rubens Barichello", "Ferriai"));
20
21            //遍历List
22            foreach (Racer R in racers)
23            {
24                Console.WriteLine(R);
25            }
26
27            Console.WriteLine("\n----------FindAll Method Demo-------------\n");
28
29            //查找findAll
30            FindRacer finder = new FindRacer("Ferriai");
31            foreach (Racer r in racers.FindAll(new Predicate<Racer>(finder.DrivingCarPredicate)))//Predicate是一个泛型的委托
32            //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
33            {
34                Console.WriteLine(r);
35            }
36
37            Console.WriteLine("\n----------Find Method Demo-------------");
38            //Find方法(若找到的结果不止一条时，显示第一条)
39            FindRacer f2 = new FindRacer("McLaren-Mercedes");
40
41            Racer R2 = racers.Find(new Predicate<Racer>(f2.DrivingCarPredicate));
42
43            if (R2 != null)
44            {
45                Console.WriteLine(R2);
46            }
47            else
48            {
49                Console.WriteLine("No racer drive McLaren-Mercedes ");
50            }
51
52            Console.WriteLine("\n----------FindLast Method Demo-------------");
53            FindRacer f3 = new FindRacer("McLaren-Mercedes");
54
55            Racer R3 = racers.FindLast(new Predicate<Racer>(f2.DrivingCarPredicate));
56
57            if (R3 != null)
58            {
59                Console.WriteLine(R3);
60            }
61            else
62            {
63                Console.WriteLine("No racer drive McLaren-Mercedes ");
64            }
65
66            Console.ReadLine();
67        }
68
69
70        //static bool FindFerriai(Racer R)
71        //{
72        //    return R.Car == "Ferriai";
73        //}
74
75
76    }
77
78
79    /**//**/
80    /**//// <summary>
81    /// 查找Racer的类(根据car查找)
82    /// </summary>
83    public class FindRacer
84    {
85        private string _car;
86        public FindRacer(string car)
87        {
88            this._car = car;
89        }
90
91        public bool DrivingCarPredicate(Racer r)
92        {
93            return r.Car == _car;
94        }
95    }
96
97    /**//**/
98    /**//// <summary>
99    /// Racer类
100    /// </summary>
101    public class Racer
102    {
103        private string _name;
104        public string Name
105        {
106            get
107            {
108                return _name;
109            }
110        }
111
112        private string _car;
113        public string Car
114        {
115            get
116            {
117                return _car;
118            }
119        }
120
121        public Racer(string name, string car)
122        {
123            this._name = name;
124            this._car = car;
125        }
126
127        public override string ToString()
128        {
129            return _name + "," + _car;
130        }
131
132    }
133}