$scope.uploader2.onAfterAddingAll = function (fileItems) {
        $scope.$parent.pictureFilenames = $scope.$parent.pictureFilenames.concat(fileItems);
        for(var file in fileItems) {
            fileReader.readAsDataUrl(fileItems[file]._file, $scope).then(function (result) {
                $scope.$parent.pictureFilenamesContent.push(result);
            });
        }
    }