如何知道在Windows Phone 8中開啓/關閉位置？

Question

我試過以下代碼來檢查位置模式的狀態，但它不適合我。

Geolocator locationservice = new Geolocator(); 
if (locationservice.LocationStatus == PositionStatus.Disabled) 
{ 
locationButton.Opacity = 0.5; 
} 

Answer 1

您可以嘗試此代碼，它從位置服務獲取數據，並在位置服務狀態更改時引發更改通知。此代碼如果來自msdn

using System.Device.Location; 

// Click the event handler for the 「Start Location」 button. 
private void startLocationButton_Click(object sender, RoutedEventArgs e) 
{ 
    // The watcher variable was previously declared as type GeoCoordinateWatcher. 
    if (watcher == null) 
    { 
     watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High); // using high accuracy 
     watcher.MovementThreshold = 20; // use MovementThreshold to ignore noise in the signal 
     watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged); 
     watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged); 
    } 
    watcher.Start(); 
} 

void watcher_StatusChanged(object sender, GeoPositionStatusChangedEventArgs e) 
{ 
    switch (e.Status) 
    { 
     case GeoPositionStatus.Disabled: 
      // The Location Service is disabled or unsupported. 
      // Check to see whether the user has disabled the Location Service. 
      if (watcher.Permission == GeoPositionPermission.Denied) 
      { 
       // The user has disabled the Location Service on their device. 
       statusTextBlock.Text = "you have this application access to location."; 
      } 
      else 
      { 
       statusTextBlock.Text = "location is not functioning on this device"; 
      } 
      break; 

     case GeoPositionStatus.Initializing: 
      // The Location Service is initializing. 
      // Disable the Start Location button. 
      startLocationButton.IsEnabled = false; 
      break; 

     case GeoPositionStatus.NoData: 
      // The Location Service is working, but it cannot get location data. 
      // Alert the user and enable the Stop Location button. 
      statusTextBlock.Text = "location data is not available."; 
      stopLocationButton.IsEnabled = true; 
      break; 

     case GeoPositionStatus.Ready: 
      // The Location Service is working and is receiving location data. 
      // Show the current position and enable the Stop Location button. 
      statusTextBlock.Text = "location data is available."; 
      stopLocationButton.IsEnabled = true; 
      break; 
    } 
}