IComparable IComparer Array排序

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最新推荐文章于 2025-03-17 17:42:54 发布

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原文链接：http://www.cnblogs.com/Kiros/archive/2010/12/31/1923264.html

本文介绍如何在C#中使用IComparable和IComparer接口对自定义类进行排序。通过实现IComparable接口的CompareTo方法，可以轻松地对包含自定义类型的数组进行排序。同时，通过创建一个实现了IComparer接口的类，可以提供额外的比较逻辑。

IComparable IComparer Array排序

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控制台程序

实现对一个类的排序

using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;

namespace ArrayEX
{
    public class Person : IComparable<Person>
    {
        public string LastName { get; set; }
        public string FirstName { get; set; }
        public Person(string LastName,string FirstName)
        {
            this.LastName = LastName;
            this.FirstName = FirstName;
        }

        public int CompareTo(Person obj)
        {
            int result = this.LastName.CompareTo(obj.LastName);
            if (result == 0)
            {
                result = this.FirstName.CompareTo(obj.FirstName);
            }
            return result;
        }
    }

    public class PersonComparer : IComparer<PersonComparer>
    {
        public string LastName { get; set; }
        public string FirstName { get; set; }
        public PersonComparer(string LastName, string FirstName)
        {
            this.LastName = LastName;
            this.FirstName = FirstName;
        }
        public int Compare(PersonComparer x,PersonComparer y)
        {
            return x.LastName.CompareTo(y.LastName);
        }
    }
}

//////////////////////////////////////

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ArrayEX
{
    class Program
    {
        static void Main(string[] args)
        {
            Person[] persons ={
                                 new Person("Emerson","Fittipaldi"),
                                 new Person("Niki","Lauda"),
                                 new Person("Ayrton","Senna"),
                                 new Person("Michael","Schumacher"),
                             };
            Array.Sort(persons);
            foreach (Person p in persons)
            {
                Console.WriteLine("{0}\t{1}", p.LastName, p.FirstName);
            }

Console.WriteLine("/////////////////////////");

            PersonComparer[] personcomparer ={
                                                new PersonComparer("Emerson","Fittipaldi"),
                                                new PersonComparer("Niki","Lauda"),
                                                new PersonComparer("Michael","Schumacher"),
                                                new PersonComparer("Ayrton","Senna"),
                                            };
            Array.Sort(personcomparer, personcomparer);
            foreach (PersonComparer p in personcomparer)
            {
                Console.WriteLine("{0}\t{1}", p.LastName, p.FirstName);
            }
            Console.Read();
        }
    }
}