CODEWITHSUNDEEP
asp.netasp.net-mvc-3
A G
A G

Reputation: 22577

ASP.NET MVC 3 Model null on submit

View

@model Survey.Models.TakeSurveyViewModel
@{    
    Layout = "~/Views/Shared/_SiteLayout.cshtml";
}

<h2>SURVEY : @Model.Title</h2>
<h3>@Model.Description</h3>
<hr />

@using (Html.BeginForm("SubmitSurvey", "HomePage", FormMethod.Post, new { id = "surveyForm" }))
{
    for (int index = 0; index < Model.SurveyQuestions.Count; index++)
    {
        @* Editor Template - Null result *@ 
        @*SurveyQuestionModel item = Model.SurveyQuestions[index];
        @Html.EditorFor(x => item);*@

        <p>@Model.SurveyQuestions[index].QuestionText</p>
        @Html.DropDownListFor(item => Model.SurveyQuestions[index].OptionId, new SelectList(Model.SurveyQuestions[index].Options, "OptionId", "OptionText"), string.Empty)
    }
    <input type="submit" value="SubmitSurvey" />
}

ViewModel

public class TakeSurveyViewModel
    {
        public string Title { get; set; }
        public string Description { get; set; }
        public int SurveyId { get; set; }

        public List<SurveyQuestionModel> SurveyQuestions { get; set; } 

        public TakeSurveyViewModel() { }

        public TakeSurveyViewModel(int surveyId)
        {
            //Populate data - works ok.
        }
    }

DropDownList Model

public class SurveyQuestionModel
    {
        public int QuestionId { get; set; }
        public string QuestionText { get; set; }

        [Required(ErrorMessage = "Please select an option.")]        
        public int OptionId { get; set; }

        public IEnumerable<QuestionOption> Options { get; set; } 
    }

The page is rendering fine, with all the drop-downs with correct options. The id and name of each select is also unique -
id="SurveyQuestions_3__OptionId" name="SurveyQuestions[3].OptionId"

Controller Action

[HttpPost]
public ActionResult SubmitSurvey(TakeSurveyViewModel model)
{
     return !ModelState.IsValid ? TakeSurvey(model.SurveyId) : null;
}

But clicking on the submit button, controller action model is null.

Edit: Removed the 2x HTML.BeginForm

Edit 2: SurveyQuestions now has public setter. The issue seem to be still there. Please see this image:

enter image description here

Upvotes: 1

Views: 2822

Answers (1)

Valamas
Valamas

Reputation: 24729

Is the problem that you have SurveyQuestions being a private set?

-old answer-
You have 2 x (Html.BeginForm(Html.BeginForm I once forgot to have my form within a using statement which did the same sort of thing.

Upvotes: 3

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