public ActionResult showExam(short id)
{
if (Session["username"] != null && Session["role"].Equals("student"))
{
var studentId = (short)Session["id"];
var examTest = _context.exam_gradeDb.Where(e => e.student_id == studentId && e.course_id == id).FirstOrDefault();
if (examTest == null)
{
var questions = _context.questionDb.Where(q => q.CourseId == id).ToList();
CourseModel course = _context.courseDb.Single(c => c.id == id);
var viewModel = new CourseQuestionsViewModel
{
course = course,
questions = questions
};
ExamModel exam = new ExamModel();
exam.course_id = id;
exam.student_id = (short)Session["id"];
exam.grade = 0;
_context.exam_gradeDb.Add(exam);
_context.SaveChanges();
return(View(viewModel));
}
else
{
return(RedirectToAction("showGrade", new RouteValueDictionary(new { Controller = "Student", Action = "showGrade", id = id })));
}
}
return(RedirectToAction("Login", "Home"));
}
public ActionResult calculateGrade(CourseQuestionsViewModel viewModel)
{
if (Session["username"] != null && Session["role"].Equals("student"))
{
var studentId = (short)Session["id"];
var exam = _context.exam_gradeDb.Single(e => e.student_id == studentId && e.course_id == viewModel.course.id);
var examQuestions = _context.questionDb.Where(e => e.CourseId == viewModel.course.id).ToList();
float studentGrade = 0;
for (int i = 0; i < viewModel.questions.Count(); i++)
{
if (viewModel.questions[i].selectChoice != null && viewModel.questions[i].selectChoice.Equals(examQuestions[i].rightAnswer))
{
studentGrade = studentGrade + (float)(100.0 / examQuestions.Count());
}
}
float studentGrade1 = (float)Math.Round(studentGrade * 100f) / 100f;
exam.grade = studentGrade1;
_context.SaveChanges();
return(RedirectToAction("showGrade", new RouteValueDictionary(new { Controller = "Student", Action = "showGrade", id = viewModel.course.id })));
}
return(RedirectToAction("Login", "Home"));
}
public ActionResult editExam(short id)
{
if (Session["username"] != null && Session["role"].Equals("professor"))
{
var questions = _context.questionDb.Where(q => q.CourseId == id).ToList();
CourseModel course = _context.courseDb.Single(c => c.id == id);
var viewModel = new CourseQuestionsViewModel
{
course = course,
questions = questions
};
return(View(viewModel));
}
return(RedirectToAction("login", "Home"));
}
