The form POST is sending null value to controller.

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ASP.NET

Razor

MVC4

I am trying to update several rows in my database through a form. Th values are in foreach loop. I am trying to update several rows for the field 'Answer' in the form. Please find the code below:

View:
@model IEnumerable<VOC.Models.QuestionnaireFeedback>

@{
    ViewBag.Title = "Index";
}

@using (Html.BeginForm("updateFeedback", "Questionnaire", FormMethod.Post))
{
      @foreach(var item in Model){
          @Html.DisplayFor(modelItem => item.ProjectID)
          @Html.DisplayFor(modelItem => item.FeedbackNo)
          @Html.EditorFor(modelItem => item.Answer)
      }
<input type="submit" value="Save" />
}

Controller:
<pre>[HttpPost]
        public ActionResult updateFeedback(List<QuestionnaireFeedback> fromQuestionnaire)
        {
            if (ModelState.IsValid) {
                FeedbackBusinessLayer feedbcakBusLayr = new FeedbackBusinessLayer();
                feedbcakBusLayr.updateFeedback(fromQuestionnaire);
                return RedirectToAction("Index");
            }
            
            return View(db.QuestionnaireFeedbacks.ToList());
        }

I am relatively new to the concept of MVC. But,I debugged the code, in the Controller fromQuestionnaire is null.
I have been stuck for a while now. Any help will be appreciated.