DropDownList

Read Data from ViewBag

//https://stackoverflow.com/questions/19986057/using-html-dropdownlist-helper-with-a-viewbag-list
@{
   IEnumerable<MyItemType> CDrop = ViewBag.Cat;


        List<SelectListItem> selectList = new List<SelectListItem>();
        foreach (var c in CDrop)
        {
            SelectListItem i = new SelectListItem();
            i.Text = c.Decsription.ToString();
            i.Value = c.TypeID.ToString();
            selectList.Add(i);
        }

}

public ActionResult Index()  
        {  
            List<SelectListItem> ObjItem = new List<SelectListItem>()  
            {  
          new SelectListItem {Text="Select",Value="0",Selected=true },  
          new SelectListItem {Text="ASP.NET",Value="1" },  
          new SelectListItem {Text="C#",Value="2"},  
          new SelectListItem {Text="MVC",Value="3"},  
          new SelectListItem {Text="SQL",Value="4" },  
            };  
            ViewBag.ListItem = ObjItem;  
            return View();  
        }

Useful Resources

http://kevintsengtw.blogspot.tw/2011/07/aspnet-mvc-dropdownlist.html