public EnrollStudentResponse EnrollStudent(EnrollStudentRequest request)
{
var database = new s19041Context();
var studies = database.Studies.First(stud => stud.Name.Equals(request.Studies));
if (studies.Equals(null))
{
throw new Exception("No such studies: " + request.Studies);
}
var student = database.Student.First(stud => stud.IndexNumber == request.IndexNumber);
if (!student.Equals(null))
{
throw new Exception("Student " + request.IndexNumber + " already exists");
}
var enrollment = database.Enrollment.First(enroll => enroll.IdStudy == studies.IdStudy && enroll.Semester == 1);
var newStudent = new GeneratedModels.Student
{
IndexNumber = request.IndexNumber,
FirstName = request.FirstName,
LastName = request.LastName,
BirthDate = request.BirthDate
};
var response = new EnrollStudentResponse();
if (enrollment.Equals(null))
{
var newEnrollment = new GeneratedModels.Enrollment
{
IdEnrollment = database.Enrollment.Max(enroll => enroll.IdEnrollment),
Semester = 1,
IdStudy = studies.IdStudy,
StartDate = DateTime.Now,
IdStudyNavigation = studies
};
database.Enrollment.Add(newEnrollment);
newStudent.IdEnrollment = newEnrollment.IdEnrollment;
newStudent.IdEnrollmentNavigation = newEnrollment;
response.IdEnrollment = newEnrollment.IdEnrollment;
response.Semester = newEnrollment.Semester;
response.IdStudy = newEnrollment.IdStudy;
response.StartDate = newEnrollment.StartDate;
}
else
{
newStudent.IdEnrollment = enrollment.IdEnrollment;
newStudent.IdEnrollmentNavigation = enrollment;
response.IdEnrollment = enrollment.IdEnrollment;
response.Semester = enrollment.Semester;
response.IdStudy = enrollment.IdStudy;
response.StartDate = enrollment.StartDate;
}
database.Add(newStudent);
database.SaveChanges();
return(response);
}
public void UpdateStudent(UpdateStudentRequest request)
{
var database = new s19041Context();
var student = database.Student.First(st => st.IndexNumber == request.IndexNumber);
student.FirstName = request.FirstName != null ? request.FirstName : student.FirstName;
student.LastName = request.LastName != null ? request.LastName : student.LastName;
student.BirthDate = request.BirthDate.Equals(null) ? request.BirthDate : student.BirthDate;
student.IdEnrollment = request.Enrollment.Equals(null) ? request.Enrollment : student.IdEnrollment;
database.SaveChanges();
}
public void DeleteStudent(string id)
{
var database = new s19041Context();
var student = new GeneratedModels.Student
{
IndexNumber = id
};
var roles = database.StudentRoles.Where(studentRoles => studentRoles.IndexNumber.Equals(id)).ToList();
foreach (var role in roles)
{
database.Remove(role);
}
database.SaveChanges();
database.Remove(student);
}
public EnrollStudentResponse PromoteStudents(PromoteStudentRequest request)
{
var database = new s19041Context();
var enrollment = database.Enrollment.Include(enroll => enroll.IdStudyNavigation).FirstOrDefault(enroll => enroll.Semester == request.Semester && enroll.IdStudyNavigation.Name.Equals(request.Studies));
if (enrollment == null)
{
throw new Exception("No such enrollment to promote");
}
var sem = new SqlParameter("@semester", request.Semester);
var stud = new SqlParameter("@Studies", request.Studies);
database.Database.ExecuteSqlRaw("exec PromoteStudents @Studies,@Semester", stud, sem);
EnrollStudentResponse response = new EnrollStudentResponse
{
IdEnrollment = enrollment.IdEnrollment,
Semester = enrollment.Semester + 1,
IdStudy = enrollment.IdStudy
};
return(response);
}
public IEnumerable <GeneratedModels.Student> GetStudents()
{
var database = new s19041Context();
return(database.Student.ToList());
}