/// <summary>
    /// 返回数据
    /// </summary>
    public class ResultData
    {
        /// <summary>
        /// 操作状态
        /// </summary>
        public ResultDataStateEnum state { get; set; }
        /// <summary>
        /// 返回的数据集
        /// </summary>
        public dynamic data { get; set; }
        /// <summary>
        /// 信息
        /// </summary>
        public string message { get; set; }
        /// <summary>
        /// 返回成功
        /// </summary>
        /// <param name="data"></param>
        /// <param name="message"></param>
        /// <returns></returns>
        public static ResultData Access(dynamic data = null, string message = "")
        {
            var r = new ResultData()
            {
                state = ResultDataStateEnum.正常,
                data = data,
                message = message
            };
            return r;
        }
        /// <summary>
        /// 返回失败
        /// </summary>
        /// <param name="message"></param>
        /// <returns></returns>
        public static ResultData Fail(string message = "")
        {
            var r = new ResultData()
            {
                state = ResultDataStateEnum.错误,
                message = message
            };
            return r;
        }
        /// <summary>
        /// 返回失败
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static ResultData Fail(object data)
        {
            var r = new ResultData()
            {
                state = ResultDataStateEnum.错误,
                data = data
            };
            return r;
        }

        /// <summary>
        /// 将返回数据转为json字符串
        /// </summary>
        /// <param name="r"></param>
        /// <returns></returns>
        public static string toJson(ResultData r)
        {
            var model_JsonSerializerSettings = new JsonSerializerSettings()
            {
                ReferenceLoopHandling = ReferenceLoopHandling.Ignore,       //
                DateFormatString = "yyyy-MM-dd HH:mm:ss"    //输出时间格式
                //其他以后补充
            };
            return JsonConvert.SerializeObject(r, Formatting.Indented, model_JsonSerializerSettings);
        }

        public enum ResultDataStateEnum
        {
            正常 = 0,
            错误 = 1,
            提示 = 2
        }
    }