public async Task <IActionResult> Attempt(int?id)
{
if (id == null)
{
NotFound();
}
var viewModel = new ExamAttemptViewModel
{
Exam = await _context.Exams.Include(e => e.Questions).ThenInclude(q => q.Question).ThenInclude(q => q.Answers).FirstOrDefaultAsync(e => e.ExamId == id),
ExamId = (int)id,
User = await _userManager.FindByIdAsync(_userManager.GetUserId(User)),
UserId = _userManager.GetUserId(User),
ParticipationDate = DateTime.Now
};
var questions = new List <ExamQuestionViewModel>();
foreach (ExamQuestion question in viewModel.Exam.Questions)
{
var questionVM = new ExamQuestionViewModel
{
QuestionId = question.Question.QuestionId,
Text = question.Question.Text,
QuestionType = question.Question.QuestionType
};
var answers = new List <ExamAnswerViewModel>();
foreach (Answer answer in question.Question.Answers)
{
var answerVM = new ExamAnswerViewModel
{
Text = answer.Text,
AnswerId = answer.AnswerId
};
answers.Add(answerVM);
}
questionVM.Answers = answers;
questions.Add(questionVM);
}
viewModel.Questions = questions;
if (viewModel == null)
{
return(NotFound());
}
return(View(viewModel));
}
public async Task <IActionResult> Attempt(ExamAttemptViewModel viewModel)
{
if (viewModel == null)
{
return(BadRequest());
}
viewModel.Exam = await _context.Exams.FirstOrDefaultAsync(e => e.ExamId == viewModel.ExamId);
if (viewModel.ParticipationDate.AddMinutes(viewModel.Exam.Duration) > DateTime.Now)
{
return(BadRequest());
}
var examAttempt = new ExamAttempt
{
ExamId = viewModel.ExamId,
UserId = viewModel.UserId,
ParticipationDate = viewModel.ParticipationDate
};
await _context.ExamAttempts.AddAsync(examAttempt);
await _context.SaveChangesAsync();
foreach (ExamQuestionViewModel question in viewModel.Questions)
{
foreach (ExamAnswerViewModel answer in question.Answers)
{
if (answer.StudentAnswer)
{
var userAnswer = new UserAnswer
{
QuestionId = question.QuestionId,
ExamAttemptId = examAttempt.ExamAttemptId,
AnswerId = answer.AnswerId
};
var realAnswer = await _context.Answers.FirstOrDefaultAsync(a => a.AnswerId == answer.AnswerId);
userAnswer.IsValid = realAnswer.IsValid;
await _context.UserAnswers.AddAsync(userAnswer);
await _context.SaveChangesAsync();
}
}
}
var userAnswers = _context.UserAnswers
.Where(userAnswer => userAnswer.ExamAttemptId.Equals(examAttempt.ExamAttemptId))
.ToList();
examAttempt.Result = (userAnswers.Select(userAnswer => userAnswer.IsValid).Count() / (userAnswers.Count() != 0 ? userAnswers.Count() : 1)) * 100;
var examAttemptData = _context.ExamAttempts.Update(examAttempt);
if (examAttemptData == null)
{
return(NotFound());
}
return(RedirectToAction("Index"));
}
