private static void showAsyncDeviceCommand(IoTDAClient client)
        {
            ShowAsyncDeviceCommandRequest req = new ShowAsyncDeviceCommandRequest
            {
                InstanceId = "1a7ffc5c-d89c-44dd-8265-b1653d951ce0",
                DeviceId   = "5eeb1fefbc61700402bc35f9_1211211",
                CommandId  = "cvdcv",
            };

            try
            {
                var resp = client.ShowAsyncDeviceCommand(req);
                Console.WriteLine(resp.Result);
            }
            catch (RequestTimeoutException requestTimeoutException)
            {
                Console.WriteLine(requestTimeoutException.ErrorMessage);
            }
            catch (ServiceResponseException clientRequestException)
            {
                Console.WriteLine(clientRequestException.HttpStatusCode);
                Console.WriteLine(clientRequestException.ErrorCode);
                Console.WriteLine(clientRequestException.ErrorMsg);
            }
            catch (ConnectionException connectionException)
            {
                Console.WriteLine(connectionException.ErrorMessage);
            }
        }
        /// <summary>
        /// 查询指定id的命令
        /// </summary>
        public ShowAsyncDeviceCommandResponse ShowAsyncDeviceCommand(ShowAsyncDeviceCommandRequest showAsyncDeviceCommandRequest)
        {
            Dictionary <string, string> urlParam = new Dictionary <string, string>();

            urlParam.Add("device_id", showAsyncDeviceCommandRequest.DeviceId.ToString());
            urlParam.Add("command_id", showAsyncDeviceCommandRequest.CommandId.ToString());
            string              urlPath  = HttpUtils.AddUrlPath("/v5/iot/{project_id}/devices/{device_id}/async-commands/{command_id}", urlParam);
            SdkRequest          request  = HttpUtils.InitSdkRequest(urlPath, showAsyncDeviceCommandRequest);
            HttpResponseMessage response = DoHttpRequestSync("GET", request);

            return(JsonUtils.DeSerialize <ShowAsyncDeviceCommandResponse>(response));
        }