My Modal Popup doesn't call the data from the database

With my ASP.NET MVC, modal popup, DataTable and SSMS Server application, I have a problem when updating the dataTable.
Am using global variable in my MVC application.
 

        $('#summary-dataTable').DataTable({
            "footerCallback": function (row, data, start, end, display) {
                console.log(data);
                var totalAmount = 0;
                for (var i = 0; i < data.lenght; i++) {
                    totalAmount += parseFloat(data[i][4]);
                }
                //console.log(totalAmount);
            },

            "processing": false,
            "serverSide": false,
            "paging": true,
            "destroy": true,
            pageLength: 25,
            createdRow: function (row, data, dataIndex) {
                $compile(angular.element(row).contents())($scope);
            },
            

            ProductStockList: '<"buttons"B>Bfrtip',
            //"dom": "Bfrtip",
            "columns": [
                 { "data": "StockInDate" },
                  { "data": "ProductName" },
                  { "data": "BatchName" },
                  { "data": "Quantity" },
                { "data": "PurchasePrice" },
                { "data": "SalesPrice" },
                 {
                     "data": null, "width": "50px", "render": function (data, type, full, meta) {
                         return "Edit";
                     }
                 },
            ],
            "ajax": {
                "url": "/Home/GetAllProductStocks",
                "type": "GET",
                "dataSrc": "[]",
            },
        });

        // declaring a global scope variable
        $scope.ProductStock = new Object();
        var init = function () {
            GetProducts();
            GetBatchs();
            GetAllProductStock();
        }; // end of init
        init(); //init is called

        // Global scope variable for productStock 
        function GetProducts() {
            $http.get('/Home/GetAllProduct')
            .then(function (response) {
                var data = response.data;
                $scope.ProductList = data;
            });
        }

        function GetBatchs() {
            $http.get('/Home/GetAllBatch')
            .then(function (response) {
                var data = response.data;
                $scope.BatchList = data;
            });
        }
       
        $scope.getProductStock = function ($ProductQtyId, BatchName) {
            return $.ajax({
                contentType: 'application/json; charset=ut-8',
                dataType: 'json',
                type: 'GET',
                url: "/Home/UpdateProductStock" + "?ProductQtyId=" + $ProductQtyId + "&BatchName=" + BatchName,
                //data: data,
                success: function (result) {
                    console.log(result);
                    debugger;                  
                    $scope.ProductStock = result;

                    $scope.$apply();

                    $("#ProductStockModal").modal('show');

                },
                error: function () {
                    alert("Error!")
                }

            });

        }
HOME CONTROLLER
 public ActionResult UpdateProductStock(int? ProductQtyId, string BatchName)
        {
            ASPNETMASTERPOSTEntities db = new ASPNETMASTERPOSTEntities();
            var dataList = db.tblProductStocks.Include("tblProduct").Include("tblBatch").ToList();
            var modifiedData = dataList.Where(a => a.ProductQtyId == ProductQtyId).Select(x => new
            //var modifiedData = dataList.Select(x => new
            {
                ProductQtyId = x.ProductQtyId,
                ProductId = x.ProductId,
                StockInDate = x.StockInDate,
                ProductName = x.tblProduct.ProductName,
                Quantity = x.Quantity,
                BatchId = x.BatchId,
                BatchName = x.tblBatch.BatchName,
                PurchasePrice = x.PurchasePrice,
                SalesPrice = x.SalesPrice
            }).FirstOrDefault();
            return Json(modifiedData, JsonRequestBehavior.AllowGet);
        }