IComparer<T> 这是一个接口，是用来给对象中的某一个属性经行排序

 1 class NameDESC:IComparer<StudentExt>
 2 {
 3     public int Compare(StudentExt x,StudentExt y)
 4     {
 5           return y.StudentName.CompareTo(x.StudentName);
 6     }
 7 }
 8 //按照学号降序排列
 9 class StudentIdDESC:ICompaner<StudentExt>
10 {
11      public int Compare(StudentExt x,StudentExt y)
12      {
13           return y.StudentId.CompareTo(x.StudentId);  //因为是降序所以是y.CompareTo
14     }
15 }
16 //点击插叙进行排序
17 private void btnStuIdDESC_Click(object sender,EventArgs e)
18 {
19     this.list.Sort(new StudentIdDESC());
20     this.dgvStudentList.DataSource=null;
21     thid.dgvStudentList.DataSource=list;
22 }

View Code