Question

I’m starting to learn MVC 2.0 and I’m trying to create a site with a quiz: user is asked a question and given several options of answer. If he chooses the right answer he gets some points, if he doesn’t, he looses them.

I tried to do this the following way

    public class HomeController : Controller
    {
       private ITaskGenerator taskGenerator = new TaskGenerator();
       private string correctAnswer;


    public ActionResult Index()
    {
        var task = taskGenerator .GenerateTask();
        ViewData["Task"] = task.Task;
        ViewData["Options"] = task.Options;

        correctAnswer= task.CorrectAnswer;
        return View();
    }

    public ActionResult Answer(string id)
    {
        if (id == correctAnswer)
            return View("Correct")

        return View("Incorrect");
    }
}


But I have a problem: when user answers the cotroller class is recreated and I loose correct answer. So what is the best place to store correct answer? Should I create a static class for this purpose?

Thanks for your help!
												

Answer 1

There are many different ways to persist data across multiple requests.

• Cookies
• Database layer
• View state (render the data down and pass it back up in each request)

to name a few. The simplest of these is probably a view state implementation. You can roll your own like this

<input type="hidden" name="question_1" value="<%=ViewData["question_1"]%>" />

This input will get reposted in the next submission, so you can keep track of the value.

public ActionResult Step1Post(string answer)
{
    ViewData["question_1"] = answer;
    return View("Step2")
}

public ActionResult Step2Post(string answer, string question_1)
{
    question_1; // the answer from step 1
    answer; // the answer from step 2
}