Question

Im trying to use IEnumerable so it holds multiple selections so a user can choose more then one value in my listbox.

This is how my ViewModel looks like:

    public class CreateViewModel
{
    public IEnumerable<string> SelectedValues { get; set; } 
    public IEnumerable<CoreValue> CoreValues { get; set; }
}

This is my GET in my controller:

public ActionResult Create()
{          
    CreateViewModel model = new CreateViewModel();
    model.CoreValues = AdminRepository.GetAllCoreValues();
    return View(model);
}

This how my view looks like:

@Html.ListBoxFor(m => m.SelectedValues, new MultiSelectList(Model.CoreValues, "Id", "Name"))

How do I code my POST action so that SelectedValues will be used to contain the selected values on the post?

Before Ienumerable I had string declared to CoreValueName in my ViewModel and I did something like this in my POST action which worked perfectly but now I changed it to Ienumerable and I have am not sure how to code so my selectedvalues will be used to contain the selected values in my post.

Question question = new Question();
var CoreValueID = int.parse(model.CoreValueName);
var GetAllCoreValuesID = AdminRep.GetByCoreValueID(CoreValueID);             
question.CoreValue.Add(GetAllCoreValuesID);
AdminRepository.AddQuestion(question);
AdminRepository.save();

---

This version of my POST action works perfectly beacuse model.SubjectType is declared as string in my Viewmodel:

    [HttpPost]
        public ActionResult Create(AdminCreateViewModel model)
        {

                Question question = new Question();       
                var SubjectTypeID = int.Parse(model.SubjecTypeName);
                var GetAllSubjecTypesID = AdminRep.GetBySubjectTypeID(SubjectTypeID);
                question.SubjectType.Add(GetAllSubjecTypesID);
                AdminRep.AddQuestion(question);
                AdminRep.save();
        }

This version of my Post action is not working beacuse Model.Selectedvalues is declared as Ienumerable string in my ViewModel. I tried to int.parse my model.SelectedValues but that doesnt work with Ienumerable. And GetByCoreValueID method takes int as argument so I have no idea how do to this. Do I need foreach?

 [HttpPost]
 public ActionResult Create(AdminCreateViewModel model)
 {
    Question question = new Question(); 
    var CoreValueID = model.SelectedValues;
    var GetAllCoreValuesID = AdminRep.GetByCoreValueID(CoreValueID); //
    question.CoreValue.Add(GetAllCoreValuesID);
    AdminRep.AddQuestion(question);
    AdminRep.save();

Thanks in advance!

Answer 1

You could have your POST controller action take the view model as argument. Then the SelectedValues property will contain a list of values that the user selected:

[HttpPost]
public ActionResult Index(CreateViewModel model)
{
    model.SelectedValues will cnotain the selected values from the user here
    ...
}