public IActionResult EnrollStudent(EnrollStudentRequest s)
{
EnrollStudentsResponse ret = ienr.enroll(s);
if (ret == null)
{
return(BadRequest(ienr.message));
}
else
{
return(Created("", ret));
}
}
public EnrollStudentsResponse enroll(EnrollStudentRequest s)
{
EnrollStudentsResponse ret = new EnrollStudentsResponse();
CultureInfo provider = CultureInfo.InvariantCulture;
s.Bdate = DateTime.ParseExact(s.BirthDate.Replace('.', '-'), "dd-MM-yyyy", provider);
using (var con = new SqlConnection(constr))
using (var com = new SqlCommand())
{
com.Connection = con;
con.Open();
var tran = con.BeginTransaction();
com.Transaction = tran;
try
{
com.CommandText = "select IdStudy from studies where name = @name";
com.Parameters.AddWithValue("name", s.Studies);
var dr0 = com.ExecuteReader();
if (!dr0.Read())
{
tran.Rollback();
message = "Studia nie istnieja";
code = 400;
return(null);
}
int IdStudy = (int)dr0["IdStudy"];
com.CommandText = "select * from enrollment where idStudy = @id and semester = 1";
com.Parameters.AddWithValue("id", IdStudy);
dr0.Close();
int idEnr = 0;
Boolean addEnr = false;
var dr1 = com.ExecuteReader();
if (dr1.Read())
{
idEnr = (int)dr1["IdEnrollment"];
ret.IdEnrollment = idEnr;
ret.IdStudy = (int)dr1["IdStudy"];
ret.Semester = (int)dr1["Semester"];
ret.StartDate = (DateTime)dr1["StartDate"];
dr1.Close();
}
else
{
addEnr = true;
dr1.Close();
com.CommandText = "select Max(IdEnrollment) AS MID from enrollment ";
var dr2 = com.ExecuteReader();
dr2.Read();
idEnr = ((int)dr2["MID"]) + 1;
dr2.Close();
}
com.Parameters.Clear();
com.CommandText = "Select IndexNumber from Student where IndexNumber = @idS";
com.Parameters.AddWithValue("idS", s.IndexNumber);
var dr3 = com.ExecuteReader();
if (dr3.Read())
{
message = "Student juz istnieje";
code = 400;
dr3.Close();
tran.Rollback();
return(null);
}
dr3.Close();
if (addEnr)
{
com.Parameters.Clear();
com.CommandText = "Insert into Enrollment (IdEnrollment, Semester, IdStudy, StartDate) VALUES (@IdEnr, 1, @IdS, @sdate)";
com.Parameters.AddWithValue("IdEnr", idEnr);
com.Parameters.AddWithValue("IdS", IdStudy);
com.Parameters.AddWithValue("sdate", DateTime.Today);
com.ExecuteNonQuery();
com.CommandText = "select * from enrollment where IdEnrollmet = (Select Max(IdEnrollment) from enrollment)";
var dr4 = com.ExecuteReader();
dr4.Read();
ret.IdEnrollment = idEnr;
ret.IdStudy = (int)dr4["IdStudy"];
ret.Semester = (int)dr4["Semester"];
ret.StartDate = (DateTime)dr4["StartDate"];
dr4.Close();
}
com.Parameters.Clear();
com.CommandText = "Insert into Student (IndexNumber, FirstName, LastName, BirthDate, IdEnrollment) values (@index, @name, @sname, @bdate, @Idenr);";
com.Parameters.AddWithValue("index", s.IndexNumber);
com.Parameters.AddWithValue("name", s.FirstName);
com.Parameters.AddWithValue("sname", s.LastName);
com.Parameters.AddWithValue("bdate", s.Bdate);
com.Parameters.AddWithValue("Idenr", idEnr);
com.ExecuteNonQuery();
tran.Commit();
return(ret);
}
catch (SqlException e)
{
tran.Rollback();
message = e.Message;
code = 400;
return(null);
}
}
}
