c# - 在 Windows Phone 8.1 上获取 CivicAddress

Question

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

我试过使用下面的代码:

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

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

当 CivicAddress 字段为空时抛出 NullReferenceException。我了解 Windows 8 未提供 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？

Answer 1

您将需要为此使用 ReverseGeocoding - 更多信息 at MSDN .

至于windows runtime 你可以使用例如MapLocationFinder.FindLocationsAtAsync为此目的:

 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;