Question

I need to be able to build a dynamic list of dropdowns in an ASP MVC 3 project. My model contains the following:

    public IList<Collections.Division> Divisions { get; set; }


    public SelectList DivisionSelectList
    {
        get
        {
            DivisionRepository repo = new DivisionRepository();

            var divisions = repo.Divisions;

            return new SelectList(divisions,"DivisionId","DivisionName");
        }
    }

And the Division class looks like this:

    public class Division
    {
      public int DivisionId { get; set; }
    }

I build a list of dropdowns in the view like this:

     @for(int i = 0;i< Model.Divisions.Count;i++)
    {
            @Model.Divisions[i].DivisionId //for debug only
            @Html.DropDownListFor(x=>x.Divisions[i].DivisionId,Model.DivisionSelectList)
            <br/>
    }

The list of divisions is populated before rendering the view and I can see the data looks correct but the dropdowns items are not being selected. Does anyone know why?

Answer 1

This looks like a bug in MVC, see here:
DropDownListFor not binding on Edit View with repeating items (List<T>)

I had to do this:

@Html.DropDownListFor(x=>x.Divisions[i].DivisionId,new SelectList(Model.DivisionSelectList,"Value","Text",Model.Divisions[i].DivisionId))