C#泛型排序,100分送上----------------------------->

[一方晴空]

假如现在有一个Student实体类，按Student里面的Name排序，排序规则如下，Name里面凡是带有“志”这个字的就排在前面。代码最好能比较精炼。

[gxingmin]

类实现IComparable接口

[tashiwoweiyi]

类实现IComparable接口

[gxingmin]

    public class Student :IComparable<Student>,IComparer<Student>
    {
        public string Name;

        public int CompareTo(Student t)
        {
            if (this.Name.IndexOf("志")>-1 && t.Name.IndexOf("志")>-1)
                return this.Name.CompareTo(t.Name);
            if (this.Name.IndexOf("志")>-1)
                return -1;
            if (t.Name.IndexOf("志")>-1)
                return 1;

            return this.Name.CompareTo(t.Name);
        }

        public int Compare(Student a, Student b)
        {
            return a.CompareTo(b);
        }
    }

[vssvss]

[Quote=引用 3 楼 gxingmin 的回复:]
C# code
public class Student :IComparable<Student>,IComparer<Student>
{
public string Name;

public int CompareTo(Student t)
{
if (this.Name.IndexOf(……
[/Quote]
不错 学习了

[gxingmin]

重载几个操作符

 public class Student :IComparable<Student>,IComparer<Student>
    {
        public string Name;

        public int CompareTo(Student t)
        {
            if (this.Name.IndexOf("志")>-1 && t.Name.IndexOf("志")>-1)
                return this.Name.CompareTo(t.Name);
            if (this.Name.IndexOf("志")>-1)
                return -1;
            if (t.Name.IndexOf("志")>-1)
                return 1;

            return this.Name.CompareTo(t.Name);
        }

        public int Compare(Student a, Student b)
        {
            return a.CompareTo(b);
        }

        public static bool operator >(Student a, Student b)
        {
            return (a.CompareTo(b) > 0);
        }

        public static bool operator <(Student a, Student b)
        {
            return (a.CompareTo(b) < 0);

        }

        public static bool operator >=(Student a, Student b)
        {
            return (a.CompareTo(b) >= 0);
        }

        public static bool operator <=(Student a, Student b)
        {
            return (a.CompareTo(b) <= 0);

        }

        public static bool operator ==(Student a, Student b)
        {
            return (a.CompareTo(b) == 0);
        }

        public static bool operator !=(Student a, Student b)
        {
            return (a.CompareTo(b) != 0);

        }

        public override bool Equals(object obj)
        {
            if (obj == null)
                return false;
            if (obj as Student == null)
                return false;

            return this == obj as Student;
        }

        public override int GetHashCode()
        {
            return this.Name.GetHashCode();
        }
    
    }

[wuyi8808]

using System;
using System.Collections.Generic;

class Student
{
  private string name;
  public string Name { get { return name; } }
  public Student(string name) { this.name = name; }
  public override string ToString() { return name; }
}

class Program
{
  private static int CompareByNameZhi(Student x, Student y)
  {
    if (x == null)
    {
      if (y == null) return 0;
      else return -1;
    }
    else // x != null
    {
      if (y == null) return 1;
      else
      {
        if (x.Name == y.Name) return 0;
        return y.Name.IndexOf('志') - x.Name.IndexOf('志');
      }
    }
  }
  
  static void Main()
  {
    List<Student> list = new List<Student>();
    list.Add(new Student("张三"));
    list.Add(new Student("志在必得"));
    list.Add(new Student("李四"));
    list.Add(new Student("杨志"));
    list.Sort(CompareByNameZhi);
    foreach (Student x in list)
    {
      Console.WriteLine(x);
    }
  }
}

[一方晴空]

[Quote=引用 5 楼 gxingmin 的回复:]
重载几个操作符

C# code
public class Student :IComparable<Student>,IComparer<Student>
{
public string Name;

public int CompareTo(Student t)
{
if (this.Name.……
[/Quote]
不用再实体类里面写，主要是外面调用的一个方法

[gxingmin]

那你按6楼的方法可以实现

[youyou2404]

不写了

[一方晴空]

已经明白了，多谢~

[大Y]

看看行不行！
public class student
{
public string Name;
public string Gender;
}

页面里面写
List<student> students = new List<student>
{
new student { Name="是男人", Gender="男" },
new student { Name="男人", Gender="男" },
new student { Name="是", Gender="男" },
new student { Name="人", Gender="男" },
new student { Name="是打开的附件人", Gender="男" },
new student { Name="地方", Gender="男" },
new student { Name="都是人废物", Gender="男" },
new student { Name="出色的额", Gender="男" }

};

var resultName = from studentInfo in students
where studentInfo.Name.Contains("是")//检索出字为"是"的
orderby studentInfo.Name ascending
select studentInfo.Name;

foreach (var item in resultName) //输出
{
Response.Write(item + "<br>");
}

第一回呀，希望能够帮上你的帮，呵呵

[大Y]

刚我看的时候还没有人回了，一发，这么多人回了，整的都不好意思了，

[一方晴空]

如果是索引器排序呢？