// Create or Update
        public override string PostAction(string parameters, NameValueCollection querystring, string postdata)
        {
            var data        = string.Empty;
            var bvin        = FirstParameter(parameters);
            var fileName    = querystring["filename"];
            var description = querystring["description"];
            var firstPart   = querystring["first"];

            var response = new ApiResponse <bool>();

            byte[] postedData = null;
            try
            {
                if (firstPart == "1")
                {
                    var existing = HccApp.CatalogServices.ProductFiles.Find(bvin);
                    if (existing == null || existing.Bvin == string.Empty)
                    {
                        existing.Bvin             = bvin;
                        existing.FileName         = fileName;
                        existing.ShortDescription = description;
                        existing.StoreId          = HccApp.CurrentStore.Id;
                        HccApp.CatalogServices.ProductFiles.Create(existing);
                    }
                }

                postedData = Json.ObjectFromJson <byte[]>(postdata);

                var diskFileName = bvin + "_" + fileName + ".config";
                if (postedData != null)
                {
                    if (postedData.Length > 0)
                    {
                        if (firstPart == "1")
                        {
                            response.Content = DiskStorage.FileVaultUploadPartial(HccApp.CurrentStore.Id, diskFileName,
                                                                                  postedData, true);
                        }
                        else
                        {
                            response.Content = DiskStorage.FileVaultUploadPartial(HccApp.CurrentStore.Id, diskFileName,
                                                                                  postedData, false);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                response.Errors.Add(new ApiError("EXCEPTION", ex.Message));
                return(Json.ObjectToJson(response));
            }

            data = Json.ObjectToJson(response);
            return(data);
        }