Students类实现自定义排序 IComparer

 

 

    class Program
    {
        static void Main(string[] args)
        {
            List<Students> objList = new List<Students>();

            Students stu1 = new Students { Name = "Mick", Age = 20 };
            Students stu2 = new Students { Name = "Jack", Age = 30 };
            objList.Add(stu1);
            objList.Add(stu2);
            Console.WriteLine(stu1.Age.CompareTo(stu2.Age));
            Console.WriteLine(stu1.Name.CompareTo(stu2.Name));
            objList.Sort();

            objList.Sort(new AgeAsc());//年龄升序
            objList.Sort(new AgeDesc());//年龄降序
            objList.Sort(new NameAsc());//年龄升序
            objList.Sort(new NameDese());//年龄降序
            foreach (var item in objList)
            {
                Console.WriteLine(item.Name + "-" + item.Age);
            }
            Console.ReadKey();
        }
    }

 

 public class Students : IComparable<Students>
    {
        public string Name { get; set; }
        public int Age { get; set; }

        public int CompareTo(Students other)
        {
            return other.Name.CompareTo(this.Name);
        }
    }

 

    public class AgeDesc :IComparer<Students>
    {
        public int Compare(Students x, Students y)
        {
            return y.Age - x.Age;
        }
    }
    public class AgeAsc : IComparer<Students>
    {
        public int Compare(Students x, Students y)
        {
            return x.Age.CompareTo(y.Age);
        }
    }
    public class NameDese : IComparer<Students>
    {
        public int Compare(Students x, Students y)
        {
            return y.Name.CompareTo(x.Name);
        }
    }
    public class NameAsc : IComparer<Students>
    {
        public int Compare(Students x, Students y)
        {
            return x.Name.CompareTo(y.Name);
        }
    }