public IHttpActionResult Get([FromUri] Request <MetaData> request)
 {
     try
     {
         Response <List <TreeItem> > response = new Response <List <TreeItem> >();
         List <TreeItem>             treeList = bll.GetTreeList(request.Keyword);
         response.Data = treeList;
         return(Ok(response));
     }
     catch (Exception ex)
     {
         LogService.WriteErrorLog("MetaDataPickerController[Get]", ex.ToString());
         return(BadRequest(ex.Message));
     }
 }