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前几天做项目用到, 代码贴给大家。

/// 
        /// 获取当前位置的经纬度        /// 
        /// 
        public static double[] GetLocationProperty()         {            double[] latLong = new double[2];            GeoCoordinateWatcher watcher = new GeoCoordinateWatcher();            watcher.TryStart(false,TimeSpan.FromMilliseconds(1000));            GeoCoordinate coord = watcher.Position.Location;            if (coord.IsUnknown != true)            {                latLong[0] = coord.Latitude;                latLong[1] = coord.Longitude;            }            return latLong;        } #region 两个经纬度之差求的距离        private const double EARTH_RADIUS = 6378.137;        private static double rad(double d)        {            return d * Math.PI / 180.0;        }        public static double GetDistance(double lat1, double lng1, double lat2, double lng2)        {            double radLat1 = rad(lat1);            double radLat2 = rad(lat2);            double a = radLat1 - radLat2;            double b = rad(lng1) - rad(lng2);            double s = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(a / 2), 2) +             Math.Cos(radLat1) * Math.Cos(radLat2) * Math.Pow(Math.Sin(b / 2), 2)));            s = s * EARTH_RADIUS;            s = Math.Round(s * 10000) / 10000;            return s;        }        #endregion//URL接口来自诺基亚地图public static Uri Get_CityNameOnMap(double slatitude, double slongitude)         {            string urlString = "http://loc.desktop.maps.svc.ovi.com/geocoder/rgc/1.0?" + "lat=" + slatitude + "&long=" + slongitude + "&output=json";            return new Uri(urlString, UriKind.RelativeOrAbsolute);        }