User1255309776 posted
Hi guys,
As some of you knows, I'm developing a quiz application. I have timer in question view and this time I need to get the time between opening the question view and submitting the answer. Then I substruct that interval from 60 in order to get remained seconds
which will be the point of the question if the answer is right. Here is the details:
View
@model Intellect.Models.ViewModels.AdminViewModel
<div class="questioncontainer">
<form asp-action="Question" asp-controller="Home" asp-route-id="@Model.NextQuestion.Id" asp-route-count="@ViewBag.Equestions">
<div class="row">
<div class="col-lg-3"></div>
<div class="col-lg-6 col-sm-12">
<table>
<tr>
<th>Qaliq vaxt</th>
</tr>
<tr>
<td>
<div id="time"></div>
</td>
</tr>
</table>
<div class="question">@Model.CurrentQuestion.Description </div>
</div>
<div class="col-lg-3"></div>
</div>
<div class="row">
<div class="col-lg-3 col-sm-0"></div>
@{
int n = 0;
}
@foreach (Answer item in Model.Answers)
{
if (n == 0 || n == 2)
{
@: <div class="col-lg-3 col-sm-12">
@: <div class="firstpart">
}
<input asp-for="@item.Id" name="@item.Id" hidden />
<input type="radio" asp-for="@item.Id" name="myanswer" value="@item.Id" />@item.Description
<br>
if (n == 1 || n == 3)
{
@:</div>
@:</div>
}
n++;
}
<div class="col-lg-3"></div>
</div>
<div class="row">
<div class="col-lg-6 col-sm-4">
</div>
<div class="col-lg-3 col-sm-4">
</div>
<div class="col-lg-3 col-sm-4">
<div class="nextbtn">
@if (ViewBag.Equestions == 0)
{
<input type="submit" value="Finish" />
}
else
{
<input type="submit" value="Next" />
}
</div>
</div>
</div>
</form>
</div>
@section Script{
<script>
function StartTimer(seconds) {
var intSeconds = seconds;
var timer = setInterval(myTimer, 1000);
function myTimer() {
if (intSeconds < 0) {
Alert("bitdi")
clearInterval(timer)
return;
}
document.getElementById("time").innerText = intSeconds;
intSeconds--;
}
}
StartTimer(60);
</script>
}
Controller
public class HomeController : Controller
{
private readonly IntellectDbContext _intellectDbContext;
private readonly UserManager<ExamUser> _userManager;
private readonly SignInManager<ExamUser> _signInManager;
static int exam_id = 0;
static int? PreviousId = 0;
static int result = 0;
static int correctAnswer = 0;
static List<Question> RemainedQuestions = new List<Question>();
static List<int> trueAnswers = new List<int>();
public HomeController(IntellectDbContext intellectDbContext, UserManager<ExamUser> userManager, SignInManager<ExamUser> signInManager)
{
_intellectDbContext = intellectDbContext;
_userManager = userManager;
_signInManager = signInManager;
}
[HttpGet]
public async Task<IActionResult> Test(int Id)
{
exam_id = Id;
AdminViewModel admodel = new AdminViewModel();
admodel.Equestions = await _intellectDbContext.Questions.Include(q => q.Answers).Where(q => q.ExamId == Id).ToListAsync();
admodel.CurrentQuestion = await _intellectDbContext.Questions.Where(q => q.ExamId == Id).FirstOrDefaultAsync();
RemainedQuestions = admodel.Equestions;
PreviousId = admodel.CurrentQuestion.Id;
return View(admodel);
}
[HttpGet]
public async Task<IActionResult> Question(int Id, int count)
{
AdminViewModel admodel = new AdminViewModel();
admodel.CurrentQuestion = await _intellectDbContext.Questions.Where(x => x.Id == Id).SingleOrDefaultAsync();
admodel.Answers = await _intellectDbContext.Answers.Where(y => y.QuestionId == Id).ToListAsync();
admodel.Equestions = await _intellectDbContext.Questions.Where(q => q.ExamId == exam_id).ToListAsync();
// admodel.CurrentQuestion.Remainedtime = new TimeSpan(0, 0, 60);
HttpContext.Session.SetString("currentQuestion_" + admodel.CurrentQuestion.Id, DateTime.Now.ToString());
if (count > 1)
{
var question = RemainedQuestions.Single(r => r.Id == admodel.CurrentQuestion.Id);
PreviousId = question.Id;
RemainedQuestions.Remove(question);
admodel.NextQuestion = RemainedQuestions[0];
count -= 1;
}
else
{
admodel.NextQuestion = RemainedQuestions[0];
count -= 1;
}
if (count == -1)
{
return RedirectToAction(nameof(Finish));
}
ViewBag.Equestions = count;
return View(admodel);
}
[HttpPost]
public async Task<IActionResult> Question(int Id, int count, int myanswer)
{
AdminViewModel admodel = new AdminViewModel();
admodel.CurrentQuestion = await _intellectDbContext.Questions.Where(x => x.Id == Id).SingleOrDefaultAsync();
admodel.Answers = await _intellectDbContext.Answers.Where(y => y.QuestionId == Id).ToListAsync();
admodel.Equestions = await _intellectDbContext.Questions.Where(q => q.ExamId == exam_id).ToListAsync();
// admodel.CurrentQuestion.Remainedtime = new TimeSpan(0, 0, 60);
// HttpContext.Session.SetString("currentQuestion_" + admodel.CurrentQuestion.Id, DateTime.Now.ToString());
var interval = DateTime.Now - DateTime.Parse(HttpContext.Session.GetString("currentQuestion_" + Id));
correctAnswer = _intellectDbContext.Answers.Where(a => a.QuestionId == PreviousId && a.Correct == true).SingleOrDefault().Id;
if (_signInManager.IsSignedIn(User))
{
ExamUser examTaker = await _userManager.GetUserAsync(HttpContext.User);
examTaker.TestTaker = await _intellectDbContext.TestTakers
.Include(tt => tt.UserQuestions)
.Where(t => t.Id == examTaker.TestTakerId)
.FirstOrDefaultAsync();
admodel.CurrentQuestion = examTaker.TestTaker.UserQuestions.Select(u => u.Question).Where(x => x.Id == Id).SingleOrDefault();
if (myanswer == correctAnswer)
{
admodel.CurrentQuestion.Score = 60 - (int)interval.TotalMilliseconds / 1000;
await _intellectDbContext.SaveChangesAsync();
// admodel.CurrentQuestion.Score = result;
}
}
if (count > 1)
{
var question = RemainedQuestions.Single(r => r.Id == admodel.CurrentQuestion.Id);
PreviousId = question.Id;
RemainedQuestions.Remove(question);
admodel.NextQuestion = RemainedQuestions[0];
count -= 1;
}
else
{
admodel.NextQuestion = RemainedQuestions[0];
count -= 1;
}
if(count == -1)
{
return RedirectToAction(nameof(Finish));
}
ViewBag.Equestions = count;
return RedirectToAction(nameof(Question));
}
}
When I run the application, the following errors comes (refer to link) when clicking on Next to get to the next question view: https://prnt.sc/s6y9vy
As you see, action (Question) in controller cannot get string data from session to parse it.
The problem lies here: var interval = DateTime.Now - DateTime.Parse(HttpContext.Session.GetString("currentQuestion_" + Id));
Please, assist in solving this issue.
Problem with Session when getting string data to the action of controller
