windows手机GPS教程显示错误的位置

Question

我制作了一个用于获取纬度和经度并将其转换为地址的应用程序我在模拟器上尝试显示 lat-47.669 和 long = -122.124 。我在设备上测试了它在日本的显示位置。但是，我在印度的海德拉巴。这怎么可能，请检查我的代码是不正确还是设备问题

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