C# Threading.ThreadPoolTimer类代码示例

        //private void LedTest()
        //{
        //    var led = new Led(22);
        //    led.On();
        //    led.Off();
        //}

        private void UCSensor()
        {
            this.InitGpio();
            _animation = new BlinkAnimation(_led1, _led2);
            _animation.Start();
            _timer = ThreadPoolTimer.CreatePeriodicTimer(Timer_Tick, TimeSpan.FromMilliseconds(500));
        }

        //
        // Simulate the background task activity.
        //
        private void PeriodicTimerCallback(ThreadPoolTimer timer)
        {
            if ((_cancelRequested == false) && (_progress < 100))
            {
                _progress += 10;
                _taskInstance.Progress = _progress;
            }
            else
            {
                _periodicTimer.Cancel();

                var key = _taskInstance.Task.Name;

                //
                // Record that this background task ran.
                //
                String taskStatus = (_progress < 100) ? "Canceled with reason: " + _cancelReason.ToString() : "Completed";
                BackgroundTaskSample.TaskStatuses[key] = taskStatus;
                Debug.WriteLine("Background " + _taskInstance.Task.Name + taskStatus);

                //
                // Indicate that the background task has completed.
                //
                _deferral.Complete();
            }
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            Debug.WriteLine("StartButton thread id: " + Environment.CurrentManagedThreadId);

            TimeSpan period = TimeSpan.FromSeconds(1);
            PeriodicTimer = ThreadPoolTimer.CreatePeriodicTimer(ElapsedHander, period, DestroyedHandler);
        }

        public async void Run(IBackgroundTaskInstance taskInstance)
        {
            // Ensure our background task remains running
            taskDeferral = taskInstance.GetDeferral();

            // Mutex will be used to ensure only one thread at a time is talking to the shield / isolated storage
            mutex = new Mutex(false, mutexId);
         
            // Initialize ConnectTheDots Settings
            localSettings.ServicebusNamespace = "windowactuator-ns";
            localSettings.EventHubName = "ehdevices";
            localSettings.KeyName = "D1";
            localSettings.Key = "1uMOwjURpgGX9l5JqnYeatBkIRoLzP7qH8YGFUeAIrU=";
            localSettings.DisplayName = GetHostName();
            localSettings.Organization = "Ulster University";
            localSettings.Location = "North Europe";

            SaveSettings();

            // Initialize WeatherShield
            await shield.BeginAsync();

            // Create a timer-initiated ThreadPool task to read data from I2C
            i2cTimer = ThreadPoolTimer.CreatePeriodicTimer(PopulateWeatherData, TimeSpan.FromSeconds(i2cReadIntervalSeconds));

            // Start the server
            server = new HttpServer(port);
            var asyncAction = ThreadPool.RunAsync((w) => { server.StartServer(shield, weatherData); });

            // Task cancellation handler, release our deferral there 
            taskInstance.Canceled += OnCanceled;

            // Create a timer-initiated ThreadPool task to renew SAS token regularly
            SasTokenRenewTimer = ThreadPoolTimer.CreatePeriodicTimer(RenewSasToken, TimeSpan.FromMinutes(15));
        }

 public void Run(IBackgroundTaskInstance taskInstance)
 {
     _deferral = taskInstance.GetDeferral();
     Init();
     temperatureTimer = ThreadPoolTimer.CreatePeriodicTimer(temperatureTimer_Tick, TimeSpan.FromMinutes(5));
     thermostatStatusTimer = ThreadPoolTimer.CreatePeriodicTimer(thermostatStatusTimer_Tick, TimeSpan.FromMilliseconds(500));
 }

        private async void Page_Loaded(object sender, RoutedEventArgs e)
        {
            ftManager = new FTManager();
            timer = ThreadPoolTimer.CreatePeriodicTimer(Timer_Tick, TimeSpan.FromMilliseconds(500));

            await seClient.Connect();
        }

        private void Timer_Tick(ThreadPoolTimer timer)
        {
            try
            {
                var devicesList = ftManager.GetDeviceList();
                Debug.WriteLine(devicesList.Count);

                if (devicesList.Count > 0)
                {
                    timer.Cancel();

                    var infoNode = devicesList[0];
                    IFTDevice ftDevice = ftManager.OpenByDeviceID(infoNode.DeviceId);

#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
                    ftDevice.SetBaudRateAsync(9600);
                    ftDevice.SetDataCharacteristicsAsync(WORD_LENGTH.BITS_8, STOP_BITS.BITS_1, PARITY.NONE);
                    ftDevice.SetFlowControlAsync(FLOW_CONTROL.NONE, 0x00, 0x00);
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed

                    device = new XBeeDevice(ftDevice);
                    ListenForData();
                }
            }
            catch (Exception ex)
            {
                throw;
            }
        }

        private async void Timer_Tick(ThreadPoolTimer timer)
        {
            try
            {
                //perform inventory scan and read available RFID tags
                var tagInventory = await _reader.PerformInventoryScan();
                if(tagInventory.Count() > 0)
                {
                    //assemble readings in the expected structure
                    List<TrackerReadingModel> readings = new List<TrackerReadingModel>();
                    foreach(var tag in tagInventory)
                    {
                        TrackerReadingModel reading = new TrackerReadingModel();
                        reading.IpAddress = _ipAddress;
                        reading.TagId = BitConverter.ToString(tag);
                        reading.Reading = DateTime.Now;
                        readings.Add(reading);
                    }

                    //send reading data to the cloud service
                    using (var client = new HttpClient())
                    {
                        client.BaseAddress = new Uri("http://YOURBASEURL.COM/");
                        client.DefaultRequestHeaders.Accept.Clear();
                        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                        var response = await client.PostAsJsonAsync("api/reading/add-multi-readings", readings);
                    }
                }
            }
            catch (Exception ex)
            {
                //TODO: Logging of exception
            }
        }

        void LogTemperatures(ThreadPoolTimer timer)
        {
            try
            {
                using (var oneWireDeviceHandler = new OneWireDeviceHandler())
                {
                    foreach (var device in oneWireDeviceHandler.GetDevices<DS18S20>())
                    {
                        var result = device.GetTemperature();
                        var extendedResult = device.GetExtendedTemperature();

                        // Insert code to log result in some way
                    }

                    foreach (var device in oneWireDeviceHandler.OneWireDevices.GetDevices<DS18B20>())
                    {
                        var result = device.GetTemperature();

                        // Insert code to log result in some way
                    }
                }
            }
            catch (Exception e)
            {
                // Insert code to log all exceptions!
            }
        }

        public Controller(Func<string, int> callback)
        {
            _callback = callback;
            _timer = ThreadPoolTimer.CreatePeriodicTimer(Timer_Tick, TimeSpan.FromMilliseconds(5000));

            _gpio_controller = GpioController.GetDefault();

            // Create the Area(s)
            
            _areas = new List<Area>() { new Area( "Area 1",
                                                  new List<Zone>() { new Zone("Zone 1", _gpio_controller.OpenPin(ZONE_1)) },
                                                  new Flow("Flow 1", _gpio_controller.OpenPin(FLOW_1)),
                                                  new OverCurrent("OC 1", _gpio_controller.OpenPin(OC_1)),
                                                  callback )};
            
            /*
            _areas = new List<Area>() { new Area( "Area 1",
                                                  new List<Zone>() { new Zone("Zone 1", _gpio_controller.OpenPin(ZONE_1)),
                                                                     new Zone("Zone 2", _gpio_controller.OpenPin(ZONE_2)),
                                                                     new Zone("Zone 3", _gpio_controller.OpenPin(ZONE_3))
                                                                   },
                                                  new Flow("Flow 1", _gpio_controller.OpenPin(FLOW_1)),
                                                  new OverCurrent("OC 1", _gpio_controller.OpenPin(OC_1)),
                                                  callback ),
                                        new Area( "Area 2",
                                                  new List<Zone>() { new Zone("Zone 4", _gpio_controller.OpenPin(ZONE_4)),
                                                                     new Zone("Zone 5", _gpio_controller.OpenPin(ZONE_5))
                                                                   },
                                                  new Flow("Flow 2", _gpio_controller.OpenPin(FLOW_1)),
                                                  new OverCurrent("OC 2", _gpio_controller.OpenPin(OC_1)),
                                                  callback )
                                     };
            */
        }

 private async void Timer_Tick(ThreadPoolTimer timer)
 {
     _timer.Cancel();
     SwitchLed(true);
     try
     {
         //var tempHumid = DeviceFactory.Build.TemperatureAndHumiditySensor(Pin.DigitalPin4, GrovePi.Sensors.TemperatureAndHumiditySensorModel.DHT11).TemperatureAndHumidity();
         //Debug.WriteLine(string.Format("Temperature={0} Humidity={1}", tempHumid.Temperature, tempHumid.Humidity));
         Int16 temp = 20; // Convert.ToInt16(tempHumid.Temperature);
         byte hum = 45; // Convert.ToByte(tempHumid.Humidity);
         using (var stream = new MemoryStream())
         {
             using (var writer = new BinaryWriter(stream))
             {
                 writer.Write(temp);
                 writer.Write(hum);
                 writer.Flush();
             }
             await _sigfox.SendAsync(stream.ToArray());
         }
     }
     finally
     {
         SwitchLed(false);
     }
 }

        private void PeriodicTimerCallback(ThreadPoolTimer timer)
        {
            if (ValueChangeCompleted == null)
            {
                return;
            }

            if (_simulatorGoingUp)
            {
                _startSimulatorValue = (ushort)(_startSimulatorValue + _stepSimulatorValue);
                if (_startSimulatorValue > _maxSimulatorValue)
                {
                    _startSimulatorValue = _maxSimulatorValue;
                    _simulatorGoingUp = false;
                }
            }
            else
            {
                _startSimulatorValue = (ushort)(_startSimulatorValue - _stepSimulatorValue);
                if (_startSimulatorValue < _minSimulatorValue)
                {
                    _startSimulatorValue = _minSimulatorValue;
                    _simulatorGoingUp = true;
                }
            }

            ValueChangeCompleted(HeartbeatMeasurement.GetHeartbeatMeasurementFromData(_startSimulatorValue, DateTimeOffset.Now));
        }

 public BlinkyExample(RemoteDevice arduino, int millisecodInterval)
 {
     Arduino = arduino;
     Interval = millisecodInterval;
     timer = ThreadPoolTimer.CreatePeriodicTimer(OnTimerElapsed,
                                 TimeSpan.FromMilliseconds(millisecodInterval));
 }

        public void Run(IBackgroundTaskInstance taskInstance)
        {
            deferral = taskInstance.GetDeferral();

            //Motor starts off
            currentPulseWidth = 0;

            //The stopwatch will be used to precisely time calls to pulse the motor.
            stopwatch = Stopwatch.StartNew();

            GpioController controller = GpioController.GetDefault();

       


            servoPin = controller.OpenPin(13);
            servoPin.SetDriveMode(GpioPinDriveMode.Output);

            timer = ThreadPoolTimer.CreatePeriodicTimer(this.Tick, TimeSpan.FromSeconds(2));
           

            //You do not need to await this, as your goal is to have this run for the lifetime of the application
            Windows.System.Threading.ThreadPool.RunAsync(this.MotorThread, Windows.System.Threading.WorkItemPriority.High);

        }

        private void PopulateWeatherData(ThreadPoolTimer timer)
        {
            bool hasMutex = false;

            try
            {
                hasMutex = mutex.WaitOne(1000);
                if (hasMutex)
                {
                    weatherData.TimeStamp = DateTime.Now.ToLocalTime().ToString();

                    shield.BlueLEDPin.Write(Windows.Devices.Gpio.GpioPinValue.High);

                    weatherData.Altitude = shield.Altitude;
                    weatherData.BarometricPressure = shield.Pressure;
                    weatherData.CelsiusTemperature = shield.Temperature;
                    weatherData.FahrenheitTemperature = (weatherData.CelsiusTemperature * 9 / 5) + 32;
                    weatherData.Humidity = shield.Humidity;

                    shield.BlueLEDPin.Write(Windows.Devices.Gpio.GpioPinValue.Low);

                    // Push the WeatherData local/cloud storage (viewable at http://iotbuildlab.azurewebsites.net/)
                    WriteDataToIsolatedStorage();
                    SendDataToConnectTheDots();
                }
            }
            finally
            {
                if (hasMutex)
                {
                    mutex.ReleaseMutex();
                }
            }
        }