Reading collection of user input from the view? - asp.net-mvc

Question

I have created a page to display list of questions to user & read user input for each question.
Issue: When user submits the Form, Model Parameter is null.
Post Action of the View is defined as below -
[HttpPost]
public ActionResult Index(IEnumerable<Question> model)
{
return View(model);
}
Code to display options to user is as below -
#foreach (var quest in Model)
{
<li>
#Html.LabelFor(x => quest.Title, quest.Title)
<ol class="Opt">
#foreach (var opt in quest.Options)
{
<li>#Html.RadioButtonFor(o => opt, opt.Title)
#Html.LabelFor(o => opt.Title, opt.Title)
</li>
}
</ol>
</li>
}
Here model is #model List<LakshyaMvc.Models.Question> and of course I have wrapped the code inside #using (Html.BeginForm())

Answer 1

Change your View Model.
#using (Html.BeginForm("Index", "Queries", FormMethod.Post))
{
for (int i = 0; i < Model.Count; i++)
{
<li>
#Html.LabelFor(x => Model[i].Question, Model[i].Question)
<ol class="Opt">
#for (int j = 0; j < Model[i].Options.Count; j++)
{
<li>#Html.RadioButtonFor(o => Model[i].Options[j].Option, false)
#Html.LabelFor(o => Model[i].Options[j].Option,
Model[i].Options[j].Option)
</li>
}
</ol>
</li>
<input type="submit" name="Submit" value="Submit" />
}
}