//学生选课
public bool ChooseCourse(String stuname, String course_num)
{
DataClassesDataContext da = new DataClassesDataContext();
Student_Course sc = new Student_Course();
sc.course = course_num;
sc.student = stuname;
da.Student_Course.InsertOnSubmit(sc);
da.SubmitChanges();
return true;
}
partial void DeleteStudent_Course(Student_Course instance);
partial void UpdateStudent_Course(Student_Course instance);
partial void InsertStudent_Course(Student_Course instance);
private void detach_Student_Course(Student_Course entity)
{
this.SendPropertyChanging();
entity.Student1 = null;
}
private void attach_Student_Course(Student_Course entity)
{
this.SendPropertyChanging();
entity.Student1 = this;
}