的windows phone GPS教程显示错误的位置

Question

我做了一个应用程序用于获取经纬度并将其转换成地址我尝试了模拟器的显示LAT-47.669和长= -122.124。我在设备上测试了它在日本的显示位置。但是，我在印度海德拉巴。这怎么可能，请检查我的代码是不正确或它的设备问题

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Net; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Navigation; 
using Microsoft.Phone.Controls; 
using Microsoft.Phone.Shell; 
using Microsoft.Phone.Maps.Controls; 
using System.Device.Location; 
using PhoneApp3.GeocodeService; 
using Microsoft.Phone.Maps.Services; 
using Windows.Devices.Geolocation; 
namespace PhoneApp3 
{ 
    public partial class map : PhoneApplicationPage 
    { 
     /// <summary> 
     /// This variable is used to get the location 
     /// from the windows phone location service 
     /// </summary> 
     GeoCoordinateWatcher myLocationWatcher; 
     private GeoCoordinate MyCoordinate = null; 
     /// <summary> 
     /// Constructor for the PhoneApplicationPage object 
     /// </summary> 
     public map() 
     { 
      InitializeComponent(); 
     } 
     private ProgressIndicator ProgressIndicator = null; 

     // My current location 

     // Reverse geocode query 
     private ReverseGeocodeQuery MyReverseGeocodeQuery = null; 

     /// <summary> 
     /// Accuracy of my current location in meters; 
     /// </summary> 
     private double accuracy = 0.0; 
     Double latitude, longitude; 

     /// <summary> 
     /// Click event handler for the high accuracy button 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     private void GetLocation(object sender, EventArgs e) 
     { 
      // Start data acquisition from the Location Service, high accuracy 
      //accuracy can be one default and another high 
      StartLocationService(GeoPositionAccuracy.High); 
     } 

     /// <summary> 
     /// Helper method to start up the location data acquisition 
     /// </summary> 
     /// <param name="accuracy">The accuracy level </param> 
     private void StartLocationService(GeoPositionAccuracy accuracy) 
     { 
      // Reinitialize the GeoCoordinateWatcher 
      myLocationWatcher = new GeoCoordinateWatcher(accuracy); 
      myLocationWatcher.MovementThreshold = 20; 

      // Add event handlers for StatusChanged and PositionChanged events 
      myLocationWatcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged); 
      myLocationWatcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged); 

      // Start data acquisition 
      myLocationWatcher.Start(); 
     } 

     /// <summary> 
     /// Handler for the StatusChanged event. This invokes MyStatusChanged on the UI thread and 
     /// passes the GeoPositionStatusChangedEventArgs 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     void watcher_StatusChanged(object sender, GeoPositionStatusChangedEventArgs e) 
     { 
      //the dispatcher dispatches to the specified method when a status change occurs 
      Deployment.Current.Dispatcher.BeginInvoke(() => MyStatusChanged(e)); 
     } 

     /// <summary> 
     /// Custom method called from the StatusChanged event handler 
     /// </summary> 
     /// <param name="e"></param> 
     void MyStatusChanged(GeoPositionStatusChangedEventArgs e) 
     { 
      switch (e.Status) 
      { 
       case GeoPositionStatus.Disabled: 
        // The location service is disabled or unsupported. 
        // Alert the user 
        MessageBox.Show("location is unsupported on this device"); 
        break; 
      } 
     } 

     /// <summary> 
     /// Handler for the PositionChanged event. This invokes MyStatusChanged on the UI thread and 
     /// passes the GeoPositionStatusChangedEventArgs 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e) 
     { 
      //Dispatcher invokes the event for position change. 
      Deployment.Current.Dispatcher.BeginInvoke(() => MyPositionChanged(e)); 
     } 

     /// <summary> 
     /// Custom method called from the PositionChanged event handler 
     /// </summary> 
     /// <param name="e"></param> 
     void MyPositionChanged(GeoPositionChangedEventArgs<GeoCoordinate> e) 
     { 
      // Update the TextBlocks to show the current location 
      LatitudeTextBlock.Text = e.Position.Location.Latitude.ToString("0.000"); 
      LongitudeTextBlock.Text += e.Position.Location.Longitude.ToString("0.000"); 
     } 
     // for converting latitude longitude to address 

     public void Button_Click(object sender, RoutedEventArgs e) 
     { 
      GetCurrentCoordinate(); 
     } 

     private async void GetCurrentCoordinate() 
     { 
      Geolocator geolocator = new Geolocator(); 
      geolocator.DesiredAccuracy = PositionAccuracy.High; 

      try 
      { 
       Geoposition currentPosition = await geolocator.GetGeopositionAsync(TimeSpan.FromMinutes(1), TimeSpan.FromSeconds(10)); 
       accuracy = currentPosition.Coordinate.Accuracy; 
       latitude = Convert.ToDouble(LatitudeTextBlock.Text); 
       longitude = Convert.ToDouble(LongitudeTextBlock.Text); 
       MyCoordinate = new GeoCoordinate(latitude, longitude); 

       if (MyReverseGeocodeQuery == null || !MyReverseGeocodeQuery.IsBusy) 
       { 
        MyReverseGeocodeQuery = new ReverseGeocodeQuery(); 
        MyReverseGeocodeQuery.GeoCoordinate = new GeoCoordinate(MyCoordinate.Latitude, MyCoordinate.Latitude); 
        // LongitudeTextBlock.Text = MyCoordinate.Longitude.ToString(); 
        // LatitudeTextBlock.Text = MyCoordinate.Latitude.ToString(); 
        MyReverseGeocodeQuery.QueryCompleted += ReverseGeocodeQuery_QueryCompleted; 
        MyReverseGeocodeQuery.QueryAsync(); 
       } 
      } 
      catch (Exception ex) 
      { 
       // ... 
       LatitudeTextBlock.Text = "hiiii"; 
      } 
     } 

     public void ReverseGeocodeQuery_QueryCompleted(object sender, QueryCompletedEventArgs<IList<MapLocation>> e) 
     { 
      if (e.Error == null) 
      { 
       if (e.Result.Count > 0) 
       { 
        MapAddress address = e.Result[0].Information.Address; 
        labelResults.Text = "Current Location: " + address.City + ", " + address.State; 
       } 
      } 
     } 

    } 
} 

Answer 1

LongitudeTextBlock.Text += e.Position.Location.Longitude.ToString("0.000"); 

尝试使用上面的代码