How to pass selected radiobutton values from View to Control

Developing Exam Software in MVC 5. I am Completely new to MVC. I want to Compare selected Answers by student with Correct Options available in database. but When i click on Submit button it show null reference Exception. i think the selected answer are not passed to controller. Please Help me Out. Thanx in Advance. (Radio button value are taken from database.)

public class Questions
    {
       public string Question { get; set; }
       public string Answer { get; set; }
       public string Option1{ get; set; }
       public string Option2 { get; set; }
       public string Option3 { get; set; }
       public string Option4 { get; set; }
    }

    public ActionResult GetQuestions()
        {
            List students = new List();
            var user = new Questions
            {
                Question="Question1",
                Option1 = "A",
                Option2 = "B",
                Option3 = "C",
                Option4 = "D",
            };
            var user2 = new Questions
            {
                Question = "Question2",
                Option1 = "A",
                Option2 = "B",
                Option3 = "C",
                Option4 = "D",
            };
            var user3 = new Questions
            {
                Question = "Question3",
                Option1 = "A",
                Option2 = "B",
                Option3 = "C",
                Option4 = "D",
            };
            students.Add(user);
            students.Add(user2);
            students.Add(user3);
            return View(students);
        }

        [HttpPost]
        public ActionResult GetQuestions(List model,FormCollection test)
        {
            return View();
        }

@model IEnumerable
@{
    ViewBag.Title = "GetQuestions";
}

GetQuestions

@using (Html.BeginForm("GetQuestions", "Home", FormMethod.Post))
{
    if (Model != null)
    {
        for (int i = 0; i < @Model.Count(); i++)
        {

        @Model.ElementAt(i).Question

        @Model.ElementAt(i).Option1


        @Model.ElementAt(i).Option2


        @Model.ElementAt(i).Option3


        @Model.ElementAt(i).Option4




        }
    }

}

If it resolve your query please mark as answer.

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Mayank9y ago
public class Questions
    {
       public string Question { get; set; }
       public string Answer { get; set; }
       public string Option1{ get; set; }
       public string Option2 { get; set; }
       public string Option3 { get; set; }
       public string Option4 { get; set; }
    }

    public ActionResult GetQuestions()
        {
            List students = new List();
            var user = new Questions
            {
                Question="Question1",
                Option1 = "A",
                Option2 = "B",
                Option3 = "C",
                Option4 = "D",
            };
            var user2 = new Questions
            {
                Question = "Question2",
                Option1 = "A",
                Option2 = "B",
                Option3 = "C",
                Option4 = "D",
            };
            var user3 = new Questions
            {
                Question = "Question3",
                Option1 = "A",
                Option2 = "B",
                Option3 = "C",
                Option4 = "D",
            };
            students.Add(user);
            students.Add(user2);
            students.Add(user3);
            return View(students);
        }

        [HttpPost]
        public ActionResult GetQuestions(List model,FormCollection test)
        {
            return View();
        }

@model IEnumerable
@{
    ViewBag.Title = "GetQuestions";
}

GetQuestions

@using (Html.BeginForm("GetQuestions", "Home", FormMethod.Post))
{
    if (Model != null)
    {
        for (int i = 0; i < @Model.Count(); i++)
        {

        @Model.ElementAt(i).Question

        @Model.ElementAt(i).Option1


        @Model.ElementAt(i).Option2


        @Model.ElementAt(i).Option3


        @Model.ElementAt(i).Option4




        }
    }

}

If it resolve your query please mark as answer.
0
ravi verma9y ago
Add a property in model with name answer (public string answer {get; set;}). From value pass using control name. so you'll get value into this property when you'll submit from.
0