/// <summary> /// 获取第一个验证错误信息内容 /// </summary> /// <param name="modelStates">ModelStateDictionary</param> /// <returns></returns> public static string FirstModelErrorMessage(this ModelStateDictionary modelStates) { if (modelStates == null || modelStates.ErrorCount == 0) { return(null); } return(modelStates.FirstOrDefault().Value.Errors.FirstOrDefault().ErrorMessage); }