IComparer接口示例代码

定义学生类。

public class Student{    public string Name { get; set; }    public string Sex { get; set; }    public int Age { get; set; }}

自定义比较器AgeComparer，实现接口IComparer<Student>，对学生年龄进行比较。

public class AgeComparer:IComparer<Student>{    public int Compare(Student x, Student y)    {        return x.Age.CompareTo(y.Age);    }}

自定义比较器NameComparer，实现接口IComparer<Student>，对学生姓名进行比较。

public class NameComparer:IComparer<Student>{    public int Compare(Student x, Student y)    {        return x.Name.CompareTo(y.Name);    }}

调用List<T>.Sort方法实现stuList按照学生的年龄与姓名排序。

static void Main(string[] args){    List<Student> stuList = new List<Student>();    stuList.Add(new Student() { Name = "aki", Sex = "Man", Age = 18 });    stuList.Add(new Student() { Name = "cki", Sex = "Woman", Age = 20 });    stuList.Add(new Student() { Name = "dki", Sex = "Woman", Age = 16 });    stuList.Add(new Student() { Name = "bki", Sex = "Man", Age = 21 });    stuList.Add(new Student() { Name = "fki", Sex = "Woman", Age = 19 });    stuList.Sort(new AgeComparer());    Console.WriteLine("按照年龄排序：");    foreach (Student stu in stuList)    {        Console.WriteLine("Name=" + stu.Name + ";Sex=" + stu.Sex + ";Age=" + stu.Age);    }    stuList.Sort(new NameComparer());     Console.WriteLine();    Console.WriteLine("按照名称排序：");    foreach (Student stu in stuList)    {        Console.WriteLine("Name=" + stu.Name + ";Sex=" + stu.Sex + ";Age=" + stu.Age);    }}

代码执行结果如下。