public ActionResult Index(string folderId, string id, string action, string actionParameter) { if (action == "rename") { dataGateway.RenameFile(id, actionParameter); return(RedirectToAction(nameof(Index), folderId)); } else if (action == "move") { dataGateway.MoveFile(id, actionParameter); return(RedirectToAction(nameof(Index), folderId)); } return(NotFound()); }