Question

I have two models and I want to insert a row in the database with a foreign key relationship populated in the DropDownList. The Item model’s data insert without problems but ManufacturerID does not get inserted (it inserts null). I could not find why.
Update: Uploaded the project to: http://mvcapplication2.codeplex.com/

<div class="editor-label">
   @Html.LabelFor(model => model.ManufacturerID,"Manufacturer")
</div>

<div class="editor-field">
   @Html.DropDownList("ManufacturerID",string.Empty)
   @Html.ValidationMessageFor(model => model.ManufacturerID)
</div>

public class Item
{
   public int ItemID { get; set; }
   public string Serial { get; set; }
   public string ItemName { get; set; }
   public int? ManufacturerID { get; set; }
   public Manufacturer Manufacturer { get; set; }
}

public class Manufacturer
{
   public int ManufacturerID { get; set; }
   public string ManufacturerName { get; set; }
   public List<Item> Items { get; set; }
}

public ActionResult Create()
{
   ViewBag.ManufacturerID = new SelectList(db.Manufacturers, "ManufacturerID", "ManufacturerName");
   return View();
} 

[HttpPost]
public ActionResult Create(Item ıtem)
{
   if (ModelState.IsValid)
   {
      db.Items.Add(ıtem);
      db.SaveChanges();
      return RedirectToAction("Index"); 
   }

   return View(ıtem);
}

Answer 1

Found the problem. The Viewbag I was sending to the view should be named as ManufacturerID, I was sending Manufacturers and somehow it was not matching although it populated the dropdown.