獲取CivicAddress在Windows Phone 8.1

Question

我想從可以將GeoPosition的CivicAddress中的Windows Phone 8.1

我用下面的代碼嘗試：

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

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

會拋出NullReferenceException異常的CivicAddress字段爲空。我知道Windows 8沒有提供CivicAddress提供程序。我想檢查Windows Phone 8.1是否屬於這種情況如果是這樣，我如何獲取/寫入CivicAddress提供程序？

Answer 1

你將需要使用反向地理編碼爲此 - 更多信息at MSDN。

至於Windows運行時比如，你可以使用MapLocationFinder.FindLocationsAtAsync用於此目的：

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; 

Answer 2

如果你想爲一個位置獲取地址，那麼我會建議你使用ReverseGeocodeQuery API與你同Geolocator API獲得的位置，以供參考執行我有一個例子可以在github上這裏https://github.com/nokia-developer/maps-samples/tree/master/RevGeoCoding

其他你也可以嘗試這個從GeoCoordinates獲得公民地址 http://msdn.microsoft.com/en-us/library/system.device.location.civicaddress(v=vs.110).aspx