public ActionResult Exam(StudentExamViewModel examViewModel)
{
var quizes = InMemoryData.GetQuizData();
var quiz = quizes.FirstOrDefault(q => q.Id == examViewModel.QuizId);
if (quiz != null)
{
var examResult = GetExamResult(examViewModel.StudentName, quiz, examViewModel);
return(View("ExamResult", examResult));
}
return(View("ExamResult", new ExamResult(examViewModel.StudentName, examViewModel.QuizText, 100, 0)));
}
public ExamResult GetExamResult(string studentName, Quiz quiz, StudentExamViewModel examViewModel)
{
var marksObtained = 0;
foreach (var question in examViewModel.QuestionsList)
{
//find the corresponding actual question
var actualQuestion = quiz.Questions.FirstOrDefault(q => q.Id == question.QuestionId);
if (actualQuestion != null)
{
var actualAnswer = actualQuestion.Answers.FirstOrDefault(a => a.IsCorrect);
if (actualAnswer != null)
{
//now check it with given user answer
if (question.SelectedAnswerId == actualAnswer.Id)
{
marksObtained += actualQuestion.Marks;
}
}
}
}
return(new ExamResult(studentName, quiz.QuizText, quiz.TotalMarks, marksObtained));
}
private static StudentExamViewModel BuildExamVm(string studentName, Quiz quiz)
{
var examVm = new StudentExamViewModel();
examVm.StudentName = studentName;
examVm.QuizId = quiz.Id;
examVm.QuizText = quiz.QuizText;
foreach (var question in quiz.Questions)
{
var questionVm = new QuestionVm(question.QuestionText);
questionVm.QuestionId = question.Id;
foreach (var answer in question.Answers)
{
var answerVm = new AnswerVm();
answerVm.Id = answer.Id;
answerVm.AnswerText = answer.AnswerText;
questionVm.Answers.Add(answerVm);
}
examVm.QuestionsList.Add(questionVm);
}
return(examVm);
}
