我的代码中的错误MVC5 Angular js

Question

我想通过jsonresult获取dropdownlist索引来交互数据库，但是当我更改下拉列表时没有生成任何操作，这里是代码。

(function () {
            //Create a Module 
            var app = angular.module('MyApp', ['ngRoute']); // Will use ['ng-Route'] 

        //implement routing

        })();

获取下拉列表索引的代码

angular.module('MyApp').controller('CommandeControllerClt', function ($scope, LocationService) {


               $scope.Id_Partenaire = null; 
               $scope.PartenaireList = null; 



               // Function For Populate  partnerers 
               $scope.GetPartenaire = function () {

                   //Load State 
                   LocationService.GetPartenaire($scope.Id_Partenaire).then(function (d) {
                       alert(d.data);  
                   }, function (error) {
                       alert('Error!');
                   });

               }

           })
        .factory('LocationService', function ($http) { // explained about factory in Part2
            var fac = {};

            fac.GetPartenaire = function (Id_Partenaire) {
                return $http.get('/CommandeClt/GetPartenaire?Id_CltOrigine=' + Id_Partenaire)
            }

            return fac;
        });

jsonResult

public JsonResult GetPartenaire(int Id_CltOrigine)
         {

var Nom_CltOrigine = MetiersRepository.ClientSearch(Id_CltOrigine).Select(s => new Partenaire() { Cd_Partenaire = s.Cd_Partenaire, Adresse_Societe = s.Adresse_Societe }).ToList();

    return new JsonResult { Data = Nom_CltOrigine, JsonRequestBehavior = JsonRequestBehavior.AllowGet };
         }

Code Rezor，下拉列表已经绑定

    <select name="Id_Partenaire" ng-model="Id_Partenaire" 
ng-options="I.Id_Partenaire as I.Cd_Partenaire for I in PartenaireList" 
    ng-change="GetState()">
                   @{
        foreach (var c in ViewBag.SelectedClientOption) 
        {
                    <option value="@c.Id_Partenaire">@c.Cd_Partenaire</option>
        }
         }
     </select>