public int AddStudentSubject(StudentSubject studentSubject) { StudentSubjectDao = new StudentSubjectDao(); //convert from business object to data access object DataAccess.Domain.StudentSubject studentSubjectData = new DataAccess.Domain.StudentSubject { UserId = studentSubject.UserId, SubjectName = studentSubject.SubjectName, SubjectCode = studentSubject.SubjectCode, AssignmentName = studentSubject.AssignmentName, SubjectDescription = studentSubject.SubjectDescription, Assignment = studentSubject.Assignment, AssignmentSize = studentSubject.AssignmentSize }; return StudentSubjectDao.AddStudentSubject(studentSubjectData); }