public IActionResult Previous(int id)
{
var session = new QuizSession(HttpContext.Session);
//get list of questions from QuestionViewModel in session
var listOfQuestions = session.GetMyQuestionViewModel();
//get index of question displayed on the screen
int index = listOfQuestions.FindIndex(q => q.QuestionId == id);
//get previous question
var quesVM = listOfQuestions[index - 1];
if (index <= 1)
{
ViewBag.Previous = false;
}
else
{
ViewBag.Previous = true;
}
ViewBag.Action = "Next";
ViewBag.QuesNo = index;
return(View("Index", quesVM));
}
public IActionResult Result(QuizViewModel quesViewModel)
{
var session = new QuizSession(HttpContext.Session);
List <Question> listOfQuestions = session.GetMyQuestions();
//get index of the question displayed on the screen
int index = listOfQuestions.FindIndex(q => q.QuestionId == quesViewModel.QuestionId);
//saving selected option in the QuestionViewModel
var questionViewModelList = session.GetMyQuestionViewModel();
questionViewModelList[index].SelectedOptionId = quesViewModel.SelectedOptionId;
session.SetMyQuestionViewModel(questionViewModelList);
// clear model state
ModelState.Clear();
var score = 0;
//if present displayed question is not last question then condition is true
if (index < (listOfQuestions.Count - 1))
{
//select next question
var question = listOfQuestions[index + 1];
ViewBag.Previous = true;
ViewBag.Action = "Next";
//if next question to be displayed is last
if ((index + 1) >= (listOfQuestions.Count - 1))
{
ViewBag.Action = "Submit";
}
ViewBag.QuesNo = index + 2;
var quesVM = GetQuestionViewModel(question);
//adding question to list in QuestionViewModel list of session if not already added
if (!questionViewModelList.Select(q => q.QuestionId).Contains(quesVM.QuestionId))
{
questionViewModelList.Add(quesVM);
session.SetMyQuestionViewModel(questionViewModelList);
}
else
{
quesVM = session.GetMyQuestionViewModel()[index + 1];
}
return(View("Index", quesVM));
}
else
{
//submit is pressed on last question so calculate score
questionViewModelList = session.GetMyQuestionViewModel();
foreach (var question in questionViewModelList)
{
if (question.CorrectAnswer == question.SelectedOptionId)
{
score++;
}
}
Quiz quiz = new Quiz();
quiz.Score = score;
quiz.QuizDate = DateTime.Now;
context.Quizzes.Add(quiz);
context.SaveChanges();
return(View(quiz));
}
}
