public HttpResponseMessage AddAttachFileList(List <AttachFileOperateDTO> dtolist) { ResultDTO <object> actionresult = new ResultDTO <object>(); try { actionresult.SubmitResult = _ICommonServices.AddAttachFileList(dtolist); } catch (Exception ex) { actionresult.SubmitResult = false; actionresult.Message = ex.Message; } HttpResponseMessage result = new HttpResponseMessage { Content = new StringContent(JsonConvert.SerializeObject(actionresult), System.Text.Encoding.GetEncoding("UTF-8"), "application/json") }; return(result); }