难道是版本的问题？？我用的是vs08顶你看下数据库中到底删除了没？ DataContext是缓存机制的

C# code

StudentDbmlDataContext sdc = new StudentDbmlDataContext();        var oldStudent = from student in sdc.Students                              where student.ID = 1                              select student;        sdc.Students.DeleteOnSubmit(oldStudent);         sdc.SubmitChanges();        this.GridView1.DataSource = sdc;        this.GridView1.DataBind();