https://www.cnblogs.com/hohoa/p/5839993.html

   if (!ModelState.IsValid)
            {
                string error = string.Empty;
                foreach (var key in ModelState.Keys)
                {
                    var state = ModelState[key];
                    if (state.Errors.Any())
                    {
                        error = state.Errors.First().ErrorMessage;
                        break;
                    }
                }
                return ApiResponse(new ReturnMessage() { Status = ResultStatus.Failed, Message = error });
            }



如果你们发现了其他的用发，请联系一下我！谢谢