How to bind dropdownlist in ADO entity model

See more:

C#

ADO.NET

MVC4

//DataAccessLayer

public List<Country> GetCountry()
       {
           try
           {
               return HRMModel.Countries.ToList();
           }
           catch (Exception)
           {

               throw;
           }
       }
       public List<State> GetStates(int countryId)
       {
           return (from s in HRMModel.States
                   where s.CountryId == countryId
                   select s).ToList();

       }
 public List<EmployeeModel> GetCountry()
        {
            var countryModelList = new List<EmployeeModel>();
            var countryList = dataAccess.GetCountry();
            if (countryList != null && countryList.Count > 0)
            {
                foreach (var country in countryList)
                {
                    var countryModel = new EmployeeModel();
                    countryModel.CountryId = country.CountryId;
                    countryModel.CountryName = country.CountryName;
                    countryModelList.Add(countryModel);
                }

            }
            return countryModelList;
        }
//Form ModelLayer
        public List<EmployeeModel> GetStateOnId(int countryId)
        {
            var stateModelList = new List<EmployeeModel>();
            var stateList = dataAccess.GetStates(countryId);

            foreach (var state in stateList)
            {

                var Model = new EmployeeModel();
                Model.StateId = state.StateId;
                Model.StateName = state.StateName;
                stateModelList.Add(Model);
            }
            return stateModelList;
        }
//From Cshtml code
<pre lang="HTML"><pre lang="HTML">

Country @Html.DropDownListFor(m => m.CountryId, new SelectList(Model.Countries, "CountryId", "CountryName"), "SelectOne", new {@onchange="GetStates()", style="width:170px" })
State @Html.DropDownListFor( m=>m.StateId,new SelectList(Model.States,"StateId","StateName"))
What I have tried:

i tried to binding dropdownList with json method,Model,dataAccessLayer,and ado.net entity frame work