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public ActionResult Index()
            var ListItms = dl.BindItems();
            List<SelectListItem> items = new List<SelectListItem>();
            foreach (var itms in ListItms)
                SelectListItem s = new SelectListItem();
                s.Text = itms.ItemCode.ToString();
                s.Value = itms.ItemName.ToString();
            ViewBag.Campaign = items;

            return View();

And here is View:
@using (Html.BeginForm("Index", "Testing"))
    @Html.DropDownList("ItmName", new SelectList(ViewBag.Campaign, "Value", "Text"))

Now I have added another DropDownList ,on below DropDownList i want to change its value as per ItmCode selectedIndex
@Html.DropDownList("ItmCode", new SelectList(ViewBag.Campaign, "Text", "Value"))
F-ES Sitecore 3-Jun-15 5:06am    
Google "mvc cascading dropdowns" for examples. SelectedIndexChanged is a webforms concept, it doesn't exist in MVC, you'll need to generate your own javascript to submit the form when the values change, or just use a pure ajax solution. Googling should find examples of both.
xibit89 3-Jun-15 5:50am    
Thanks. I'll try cascading dropdowns.

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