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实现List<T>元素排序两种方法

编辑:dnawo 日期:2012-09-28

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1.调用Sort(Comparison<T> comparison)

复制内容到剪贴板程序代码 程序代码
using System;
using System.Collections.Generic;

namespace ConsoleApplication1
{
    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }

    class Program
    {
        /// <summary>
        /// 排序方法
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        public static int FunCompare(Person x, Person y)
        {
            return x.Age.CompareTo(y.Age);
        }

        static void Main(string[] args)
        {

            List<Person> people = new List<Person>();
            people.Add(new Person() { Name = "person1", Age = 20 });
            people.Add(new Person() { Name = "person2", Age = 50 });
            people.Add(new Person() { Name = "person3", Age = 30 });

            //排序
            people.Sort(FunCompare); //或：people.Sort((x, y) => x.Age.CompareTo(y.Age));

            foreach (Person person in people)
                Console.WriteLine("{0},{1}", person.Name, person.Age);

            Console.ReadKey();
        }
    }
}

2.调用Sort(IComparer<T> comparer)

复制内容到剪贴板程序代码 程序代码
using System;
using System.Collections.Generic;

namespace ConsoleApplication1
{
    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }

    /// <summary>
    /// 排序类
    /// </summary>
    class ClsCompare : IComparer<Person>
    {
        public int Compare(Person x, Person y)
        {
            return x.Age.CompareTo(y.Age);
        }
    }

    class Program
    {
        static void Main(string[] args)
        {

            List<Person> people = new List<Person>();
            people.Add(new Person() { Name = "person1", Age = 20 });
            people.Add(new Person() { Name = "person2", Age = 50 });
            people.Add(new Person() { Name = "person3", Age = 30 });

            //排序
            people.Sort(new ClsCompare());

            foreach (Person person in people)
                Console.WriteLine("{0},{1}", person.Name, person.Age);

            Console.ReadKey();
        }
    }
}


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