在 Windows Phone 8.1 上获取 CivicAddress

我正在尝试从 Windows Phone 8.1 中的地理位置获取 CivicAddress

我尝试使用以下代码：

// Get Current Location
var geolocator = new Geolocator();
geolocator.DesiredAccuracyInMeters = 100;
var position = await geolocator.GetGeopositionAsync();

// Get Country
var country = position.CivicAddress.Country;

当 CivicAddress 字段为 null 时，它会抛出 NullReferenceException。据我所知，Windows 8 没有提供 CivicAddress 提供程序。我想检查 Windows Phone 8.1 是否属于这种情况。如果是，我如何获取/编写 CivicAddress 提供程序？

您将需要为此使用反向地理编码 - 更多信息at MSDN.

As for 窗口运行时例如你可以使用MapLocationFinder.FindLocationsAtAsync以此目的：

 var geolocator = new Geolocator();
 geolocator.DesiredAccuracyInMeters = 100;
 Geoposition position = await geolocator.GetGeopositionAsync();

 // reverse geocoding
 BasicGeoposition myLocation = new BasicGeoposition
     {
         Longitude = position.Coordinate.Longitude,
         Latitude = position.Coordinate.Latitude
     };
 Geopoint pointToReverseGeocode = new Geopoint(myLocation);

 MapLocationFinderResult result = await MapLocationFinder.FindLocationsAtAsync(pointToReverseGeocode);

 // here also it should be checked if there result isn't null and what to do in such a case
 string country = result.Locations[0].Address.Country;