private async Task <IActionResult> CreateOrUpdate(BoxEditDto box) { var result = new ResultEntity(); if (ModelState.IsValid) { if (box.PlaceId > 0) { box.SetCreateOrUpdateInfo(CurrentUser.UserId); result = await _boxAppService.AddOrUpdateAsync(box); return(Json(result)); } result.Message = "交换场所不能为空"; return(Json(result)); } result.Message = ModelState.Values .FirstOrDefault(a => a.ValidationState == ModelValidationState.Invalid)?.Errors.FirstOrDefault() ?.ErrorMessage; return(Json(result)); }