模拟Location数据：

　　Thread t = new Thread(StartLocationEmulation);

　　t.Start();

　　watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.Default);

　　watcher.MovementThreshold = 35;

　　var gcwo = Observable.FromEvent>(

　　eh =>watcher.PositionChanged +=eh,

　　eh =>watcher.PositionChanged -=eh);

　　watcher.Start();

　　private void StartLocationEmulation()

　　{

　　var position = EmulatePositionChangedEvents().ToObservable();

　　position.Subscribe(ev => wait_PositionChanged(null, ev));

　　}

　　static IEnumerable> EmulatePositionChangedEvents()

　　{

　　Random random = new Random();

　　while (true)

　　{

　　double latitude = (random.NextDouble() * 180.0) – 90.0; // latitude is between -90 and 90

　　double longitude = (random.NextDouble() * 360.0) – 180.0; // longitude is between -180 and 180

　　yield return new GeoPositionChangedEventArgs(

　　new GeoPosition(DateTimeOffset.Now, new GeoCoordinate(latitude, longitude)));

　　Thread.Sleep(random.Next(2000));

　　}

　　}

　　private void wait_PositionChanged(object sender, GeoPositionChangedEventArgs e)

　　{

　　Deployment.Current.Dispatcher.BeginInvoke(()=>MyPositionChanged(e));

　　}

　　private void MyPositionChanged(GeoPositionChangedEventArgs e)

　　{

　　this.textBlock1.Text = “Time: ” + e.Position.Timestamp. ToString(“yyyy-MM-dd hh:mm:ss”);

　　this.textBlock2.Text = “Latitude: ” + e.Position.Location.Latitude.ToString(“0.00″);

　　this.textBlock3.Text = “Longitude: ” + e.Position.Location.Longitude.ToString(“0.00″);

　　}