mvc 4 dropdownlist not function as it should

Question

The ViewData item that has the key 'WorkStations' is of type 'System.String' but must be of type 'IEnumerable'.

This is the error im getting, I am getting the value that the droplist is sending, but when it try to add it to the data it just crashes and im getting the error that i wrote abow.

I have tried updating the html tag to

@Html.DropDownList("WorkStations", (SelectList)ViewBag.WorkStations)

This is my model

namespace MvCfirstproject.Models
{
    [Table("WorkHoursModels")]
    public class WorkhoursModels
    {
        public int Id { get; set; }
        public string Start { get; set; }
        public string Stop { get; set; }
        public string command { get; set; }
        public string Users { get; set; }
        public string WorkStations { get; set; }
       

    }
    [Table("WorkStations")]
    public class WorkHoursStation
    {
        public int Id { get; set; }
        public string WorkStations { get; set; }
        public IEnumerable<SelectListItem> Workstations { get; set; }
    }


    public class WorkhourDB : DbContext 
    {
        public DbSet<WorkhoursModels> WorkHours { get; set; }
        public DbSet<WorkHoursStation> WorkStation { get; set; }
    }
}

This is my Controller

    public ActionResult Create()
    {
        ViewBag.WorkStations = new SelectList(db.WorkStation, "WorkStations", "Workstations");
        return View();
    }

    //
    // POST: /Default1/Create

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(WorkhoursModels workhoursmodels)
    {
        if (workhoursmodels.command == "Users")
        {
            db.WorkHours.Add(workhoursmodels);
            db.SaveChanges();
        }
    }

And this is my view

 @using (Html.BeginForm())
    {
        @Html.AntiForgeryToken()
        @Html.ValidationSummary(true)
        <div class="editor-label">
            @Html.LabelFor(model => model.Users)
        </div>
        <div class="editor-field">
            @Html.TextBoxFor(model => model.Users)
            @Html.ValidationMessageFor(model => model.Users)
        </div>
     
     <div>
       @Html.DropDownList("WorkStations", String.Empty)
    </div>
              <p>
             <input type="submit" name="@Html.NameFor(x => x.command)" value="User"/>

        </p>

 }

Answer 1

Assuming that you're view is strongly typed for the model WorkhoursModels

1. You don't need a viewbag because you're defining a IEnumerable in the properties of your model just change the Action passing the model to the view

   public ActionResult Create()
   {
         WorkhoursModels model = new WorkhoursModels();
         model.Workstations  = db.WorkStation.Select(x => new SelectListItem() { Text = x.WorkStations , Value = x.Id.ToString() });
         return View(model);
   }
   

2. Use the properly helper

   @Html.DropDownListFor(model => model.Id, Model.Workstations, string.Empty)