// GET: QuizAnswers
public ActionResult Index(int sessionId, int questionId = 0, int direction = 1)
{
AskQuizQuestionViewModel newQuestion = new AskQuizQuestionViewModel();
if (questionId == 0)
{
newQuestion = GetFirstUnansweredQuestion(sessionId);
}
else
{
newQuestion = GetNextQuestion(sessionId, questionId, direction);
}
//use newQuestion to populate view for display.
//ERROR Something about coming through here the second time is causing a context error with QuizQuestion.
db.Entry(newQuestion.Question).Collection(q => q.Choices).Load();
EditQuizAnswerViewModel view = new EditQuizAnswerViewModel()
{
SessionId = sessionId,
QuestionId = newQuestion.Question.ID,
CurrentQuestionNum = newQuestion.CurrentQuestionNum,
TotalQuestions = quizQuestions.Count(),
QuestionText = newQuestion.Question.Text,
};
//Now see if the user has already supplied an answer.
string userId = User.Identity.GetUserId();
QuizAnswer quizAnswer = db.QuizAnswers.SingleOrDefault(ans => ans.QuestionID == view.QuestionId && ans.AnswererID == userId);
if (quizAnswer != null)
{
view.StudentAnswer = quizAnswer.Text;
}
//Using the stripped down QuizChoiceViewModel to remove the "IsCorrect" flag from the data
//sent to the viewe page.
ICollection <QuizChoiceViewModel> quizChoices = new List <QuizChoiceViewModel>();
foreach (var choice in newQuestion.Question.Choices)
{
QuizChoiceViewModel newChoice = new QuizChoiceViewModel()
{
ID = choice.ID,
Text = choice.Text
};
quizChoices.Add(newChoice);
}
view.QuestionChoices = quizChoices;
return(View(view));
}
public ActionResult Index(string submitButton, EditQuizAnswerViewModel view)
{
if (ModelState.IsValid && view.StudentAnswer != null)
{
//Need to check for an existing answer first. If it exists, we update instead of add.
string userId = User.Identity.GetUserId();
QuizAnswer quizAnswer = db.QuizAnswers.SingleOrDefault(ans => ans.QuestionID == view.QuestionId && ans.AnswererID == userId);
if (quizAnswer == null)
{
quizAnswer = new QuizAnswer()
{
SessionID = view.SessionId,
QuestionID = view.QuestionId,
Text = view.StudentAnswer,
AnswererID = User.Identity.GetUserId(),
IsCorrect = false
};
db.QuizAnswers.Add(quizAnswer);
}
else
{
//No need to update if there is no change.
if (quizAnswer.Text != view.StudentAnswer)
{
quizAnswer.Text = view.StudentAnswer;
db.Entry(quizAnswer).State = EntityState.Modified;
}
}
db.SaveChanges();
}
switch (submitButton)
{
case "Next":
return(RedirectToAction("Index", new { sessionId = view.SessionId, questionId = view.QuestionId, direction = 1 }));
case "Prev":
return(RedirectToAction("Index", new { sessionId = view.SessionId, questionId = view.QuestionId, direction = -1 }));
case "Finish":
return(RedirectToAction("Index", "Questions", new { sessionId = view.SessionId }));
default:
goto case "Next";
}
}
