public string AddStudent(StudentDto stuDto) { Student stu = new Student(); stu.STUNAME = stuDto.StudentName; stu.STUAGE = stuDto.StuAge; stu.STUCLASS = stuDto.StuClass; stu.STUSEX = stuDto.StuSex; int i = StudentRepository.AddEntity(stu); if (i > 0) { return("添加成功。"); } else { return("添加失败。"); } }