public static class BaiduMapHelper

    {

        #region 常量

        //百度地图Api  Ak

        public const string BaiduAk = "你的百度Key";

        /// <summary>

        /// 经纬度  逆地理编码 Url  需要Format 0.ak  1.经度  2.纬度

        /// </summary>

        private const string BaiduGeoCoding_ApiUrl = "http://api.map.baidu.com/geocoder/v2/?ak={0}&location={1},{2}&output=json&pois=0";

        /// <summary>

        /// 0.地址字符串 1.ak

        /// </summary>

        private const string BaiduGeoCoding_ApiCoord = "http://api.map.baidu.com/geocoder/v2/?ak={0}&address={1}&output=json";

        #endregion

        #region 地址转换器

        /// <summary>

        /// 根据地址信息 获取 经纬度

        /// </summary>

        /// <param name="addressStr">地址字符串</param>

        /// <returns></returns>

        public static BaiDuGeoCoding AddressToCoordinate(string addressStr)

        {

            string url = string.Format(Baidu_GeoCoding_ApiCoord, addressStr);

            var model = HttpClientHelper.GetResponse<BaiDuGeoCoding>(url);

            return model;

        }

        /// <summary>

        /// 根据经纬度  获取 地址信息

        /// </summary>

        /// <param name="lat">经度</param>

        /// <param name="lng">纬度</param>

        /// <returns></returns>

        public static BaiDuGeoCoding CoordinateToAddress(object lat, string lng)

        {

            string url = string.Format(Baidu_GeoCoding_ApiUrl, lat, lng);

            var model = HttpClientHelper.GetResponse<BaiDuGeoCoding>(url);

            return model;

        }

        #endregion

        #region 辅助格式化

        /// <summary>

        /// /// <summary>

        /// 经纬度  逆地理编码 Url  需要Format 0.经度  1.纬度

        /// </summary>

        /// </summary>

        public static string Baidu_GeoCoding_ApiUrl

        {

            get

            {

                return string.Format(BaiduGeoCoding_ApiUrl, BaiduAk, "{0}", "{1}");

            }

        }

        /// <summary>

        /// 地址字符串

        /// </summary>

        public static string Baidu_GeoCoding_ApiCoord

        {

            get

            {

                return string.Format(BaiduGeoCoding_ApiCoord, BaiduAk, "{0}");

            }

        }

        #endregion

        #region model

        public class BaiDuGeoCoding

        {

            public int Status { get; set; }

            public Result Result { get; set; }

        }

        public class Result

        {

            public Location Location { get; set; }

            public string Formatted_Address { get; set; }

            public string Business { get; set; }

            public AddressComponent AddressComponent { get; set; }

            public string CityCode { get; set; }

        }

        public class AddressComponent

        {

            /// <summary>

            /// 省份

            /// </summary>

            public string Province { get; set; }

            /// <summary>

            /// 城市名

            /// </summary>

            public string City { get; set; }

            /// <summary>

            /// 区县名

            /// </summary>

            public string District { get; set; }

            /// <summary>

            /// 街道名

            /// </summary>

            public string Street { get; set; }

            public string Street_number { get; set; }

        }

        public class Location

        {

            public string Lng { get; set; }

            public string Lat { get; set; }

        }

        #endregion

    }

    public static class HttpClientHelper

    {

        /// <summary>

        /// GET请求

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="url"></param>

        /// <returns></returns>

        public static T GetResponse<T>(string url) where T : class, new()

        {

            string returnValue = string.Empty;

            HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(url));

            webReq.Method = "GET";

            webReq.ContentType = "application/json";

            using (HttpWebResponse response = (HttpWebResponse)webReq.GetResponse())

            {

                using (StreamReader streamReader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))

                {

                    returnValue = streamReader.ReadToEnd();

                    T result = default(T);

                    result = JsonConvert.DeserializeObject<T>(returnValue);

                    return result;

                }

            }

        }

    }