public Task <Position> GetPositionAsync(int timeout = Timeout.Infite, CancellationToken?token = null, bool includeHeading = false)
{
if (timeout < 0)
{
throw new ArgumentOutOfRangeException("timeout");
}
if (!token.HasValue)
{
token = CancellationToken.None;
}
IAsyncOperation <Geoposition> pos = GetGeolocator().GetGeopositionAsync(TimeSpan.FromTicks(0), TimeSpan.FromDays(365));
token.Value.Register(o => ((IAsyncOperation <Geoposition>)o).Cancel(), pos);
var timer = new Timeout(timeout, pos.Cancel);
var tcs = new TaskCompletionSource <Position>();
pos.Completed = (op, s) =>
{
timer.Cancel();
switch (s)
{
case AsyncStatus.Canceled:
tcs.SetCanceled();
break;
case AsyncStatus.Completed:
tcs.SetResult(GetPosition(op.GetResults()));
break;
case AsyncStatus.Error:
Exception ex = op.ErrorCode;
if (ex is UnauthorizedAccessException)
{
ex = new GeolocationException(GeolocationError.Unauthorized, ex);
}
tcs.SetException(ex);
break;
}
};
return(tcs.Task);
}
/// <inheritdoc/>
public Task<Position> GetPositionAsync(int timeoutMilliseconds = Timeout.Infite, CancellationToken? token = null, bool includeHeading = false)
{
if (timeoutMilliseconds < 0 && timeoutMilliseconds != Timeout.Infite)
throw new ArgumentOutOfRangeException("timeoutMilliseconds");
if (!token.HasValue)
token = CancellationToken.None;
IAsyncOperation<Geoposition> pos = GetGeolocator().GetGeopositionAsync(TimeSpan.FromTicks(0), TimeSpan.FromDays(365));
token.Value.Register(o => ((IAsyncOperation<Geoposition>)o).Cancel(), pos);
var timer = new Timeout(timeoutMilliseconds, pos.Cancel);
var tcs = new TaskCompletionSource<Position>();
pos.Completed = (op, s) =>
{
timer.Cancel();
switch (s)
{
case AsyncStatus.Canceled:
tcs.SetCanceled();
break;
case AsyncStatus.Completed:
tcs.SetResult(GetPosition(op.GetResults()));
break;
case AsyncStatus.Error:
Exception ex = op.ErrorCode;
if (ex is UnauthorizedAccessException)
ex = new GeolocationException(GeolocationError.Unauthorized, ex);
tcs.SetException(ex);
break;
}
};
return tcs.Task;
}
