public void AddChooseCourse(CourseInf courseInf, Label lblMessage) { int result = course.AddChooseCourse(courseInf); switch (result) { case 1: lblMessage.Text = "添加选课课程成功!"; break; case -1: lblMessage.Text = "该学院已经设置了修该课程"; break; case -2: lblMessage.Text = "同一时间上课教室冲突"; break; case -3: lblMessage.Text = "该老师在该时间要上其他课程"; break; case 0: lblMessage.Text = "添加选课课程失败!"; break; } }