当我尝试跟踪位置时，它工作得很好，但是当我向它添加服务引用时，当我尝试相同的程序而不添加位置时，它会抛出异常，只添加服务引用它工作得很好我的代码在下面，同时从如何连续跟踪复制Windows Phone 8 的手机位置
public partial class MainPage : PhoneApplicationPage
{
Geolocator geolocator = null;
bool tracking = false;
ServiceReference2.GetPositionClient client = new ServiceReference2.GetPositionClient();
// Constructor
public MainPage()
{
InitializeComponent();
// Sample code to localize the ApplicationBar
//BuildLocalizedApplicationBar();
}
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
if (IsolatedStorageSettings.ApplicationSettings.Contains("LocationConsent"))
{
// User has opted in or out of Location
return;
}
else
{
MessageBoxResult result =
MessageBox.Show("This app accesses your phone's location. Is that ok?",
"Location",
MessageBoxButton.OKCancel);
if (result == MessageBoxResult.OK)
{
IsolatedStorageSettings.ApplicationSettings["LocationConsent"] = true;
}
else
{
IsolatedStorageSettings.ApplicationSettings["LocationConsent"] = false;
}
IsolatedStorageSettings.ApplicationSettings.Save();
}
}
private void TrackLocation_Click(object sender, RoutedEventArgs e)
{
if ((bool)IsolatedStorageSettings.ApplicationSettings["LocationConsent"] != true)
{
// The user has opted out of Location.
return;
}
if (!tracking)
{
geolocator = new Geolocator();
geolocator.DesiredAccuracy = PositionAccuracy.High;
geolocator.MovementThreshold = 100; // The units are meters.
geolocator.StatusChanged += geolocator_StatusChanged;
geolocator.PositionChanged += geolocator_PositionChanged;
tracking = true;
TrackLocationButton.Content = "stop tracking";
}
else
{
geolocator.PositionChanged -= geolocator_PositionChanged;
geolocator.StatusChanged -= geolocator_StatusChanged;
geolocator = null;
tracking = false;
TrackLocationButton.Content = "track location";
StatusTextBlock.Text = "stopped";
}
}
void geolocator_StatusChanged(Geolocator sender, StatusChangedEventArgs args)
{
string status = "";
switch (args.Status)
{
case PositionStatus.Disabled:
// the application does not have the right capability or the location master switch is off
status = "location is disabled in phone settings";
break;
case PositionStatus.Initializing:
// the geolocator started the tracking operation
status = "initializing";
break;
case PositionStatus.NoData:
// the location service was not able to acquire the location
status = "no data";
break;
case PositionStatus.Ready:
// the location service is generating geopositions as specified by the tracking parameters
status = "ready";
break;
case PositionStatus.NotAvailable:
status = "not available";
// not used in WindowsPhone, Windows desktop uses this value to signal that there is no hardware capable to acquire location information
break;
case PositionStatus.NotInitialized:
// the initial state of the geolocator, once the tracking operation is stopped by the user the geolocator moves back to this state
break;
}
Dispatcher.BeginInvoke(() =>
{
StatusTextBlock.Text = status;
});
}
void geolocator_PositionChanged(Geolocator sender, PositionChangedEventArgs args)
{
client.getPosCompleted += new EventHandler<ServiceReference2.getPosCompletedEventArgs>(sendData);
client.getPosAsync(11,11);
Dispatcher.BeginInvoke(() =>
{
LatitudeTextBlock.Text = args.Position.Coordinate.Latitude.ToString("0.00");
LongitudeTextBlock.Text = args.Position.Coordinate.Longitude.ToString("0.00");
});
}
public void sendData(object sender, ServiceReference2.getPosCompletedEventArgs e)
{
dd.Text = e.Result;
}
}