internal MultiReverseGeocodeRequest(MapService service, IEnumerable <Geocoordinates> coordinates) : base(service, ServiceRequestType.ReverseGeocode)
{
// The Maps Service invokes this callback once when gets the response from map service provider
// The value of total is same with requested coordinates list size. Even though one of address is not provided valid address handle is retrieved.
_geocodeCallback = (result, id, total, handle, userData) =>
{
errorCode = result;
if (result.IsSuccess())
{
var addressListHandle = new Interop.AddressListHandle(handle, needToRelease: true);
var addressList = new PlaceAddressList(addressListHandle);
_addressesList = addressList.Addresses as List <PlaceAddress>;
_requestTask?.TrySetResult(_addressesList);
return(true);
}
else
{
_requestTask?.TrySetException(errorCode.GetException(errMessage));
return(false);
}
};
var coordinateList = new GeocoordinatesList(coordinates);
startExecutionAction = new Action(() =>
{
int requestID;
errMessage = "Failed to get address list for given co-ordinate list";
errorCode = _service.handle.MultiReverseGeocode(coordinateList.handle, _service.Preferences.handle, _geocodeCallback, IntPtr.Zero, out requestID);
if (errorCode.IsFailed() && errorCode != Interop.ErrorCode.Canceled)
{
_requestTask?.TrySetException(errorCode.GetException(errMessage));
}
_requestID = requestID;
});
}
internal PlaceAddressList(Interop.AddressListHandle nativeHandle)
{
handle = nativeHandle;
}
/// <summary>
/// Constructs a map address list object.
/// </summary>
/// <exception cref="System.NotSupportedException">Thrown when the required feature is not supported.</exception>
/// <exception cref="System.InvalidOperationException">Thrown when native operation failed to allocate memory.</exception>
public PlaceAddressList()
{
handle = new Interop.AddressListHandle();
}
