problems with ASP MVC + Html.DropDownList() using a ModelView Pattern

Answer 1

I'm not for sure but I think you should create model binders. (David Hayden wrote an simple model binder)

Answer 2

Edited to use Guid:

With dropdownlists I use a slightly different approach. It might be possible to get your viewmodel working, but for me it is easier this way:

public class VacaturesFormViewModel
{

    public IEnumerable<SelectListItem>EducationLevels{ get; set; }
    public Guid EducationLevelID{ get; set; }

}

The EducationLevelID will have the selected id of your Dropdown. This is the view:

<%= Html.DropDownList("EducationLevelID", Model.EducationLevels)%>

Controller

  IEnumerable<SelectListItem> educationLevelList =
                            from level in GetLevelList()
                            select new SelectListItem
                            {
                                Text = level .Name,
                                Value = level.Uid.ToString()
                            };
  model.EducationLevels = educationLevelList ;

Answer 3

You could bind educationID parameter automatically:

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Create(Guid? educationID, FormCollection form)
{
    Vacatures vacatureToAdd = new Vacatures();

    if (educationID != null)
    {
        vacatureToAdd.EducationLevels = 
            repository.GetEducationLevelByID(educationID.Value);
    }