public void UpdateStudentSubjectState(int studentID, int subjectID)
{
StudentsSubjects studentSubject = context.StudentsSubjects.FirstOrDefault
(ss => ss.SubjectID == subjectID && ss.StudentID == studentID);
if (studentSubject == null)
{
studentSubject = new StudentsSubjects();
studentSubject.StudentID = studentID;
studentSubject.SubjectID = subjectID;
AddStudentSubject(studentSubject);
}
else
{
DeleteStudentSubject(studentSubject);
}
}
public void AddStudentSubject(StudentsSubjects ss)
{
context.Add(ss);
context.SaveChanges();
}
public void DeleteStudentSubject(StudentsSubjects ss)
{
context.Remove(ss);
context.SaveChanges();
}