There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'ddldepartmentlist'

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ASP.NET

MVC

Hi,

I am new to ASP.NET MVC I want to use a dropdownlist in mvc 4 using HTML Helper. I am stuck here. i have given the code below.

Employee controller

[HttpGet]
      public ActionResult _GetEmployeeSpeciality(string id)
      {

          DataTable dtdepartment = new DataTable();
          FPDiabeticService.BoDataTable BODT = new FPDiabeticService.BoDataTable();
          BODT = new Models.Frontdesk().FetchAllDepartmentList();
          dtdepartment = BODT.PassTable;
          List<SelectListItem> ddldepartmentlist = new List<SelectListItem>();
          ddldepartmentlist.Add(new SelectListItem { Text = "---Select a Department---", Value = "-1", Selected = true });
          if (dtdepartment.Rows.Count > 0)
          {
              for (int i = 0; i < dtdepartment.Rows.Count; i++)
              {
                  ddldepartmentlist.Add(new SelectListItem { Text = dtdepartment.Rows[i]["department"].ToString(), Value = dtdepartment.Rows[i]["departmentID"].ToString() });
              }
          }
          ViewData["ddldepartmentlist"] = ddldepartmentlist;
          return View("_GetEmployeeSpeciality");
      }

IN View

@Html.DropDownList("ddldepartmentlist")

or

@Html.DropDownList("ddldepartmentlist",ViewData["ddldepartmentlist"])

when i run this

There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'ddldepartmentlist'

Error Occurs can anyone helpme.


thanks
parithi