C#调用Geocoding API进行地理编码与逆编码

使用C#调用Geocoding API来将地址转为经纬度，或者将经纬度转变为具体的地址。

Geocoding API的详细介绍参见：http://developer.baidu.com/map/webservice-geocoding.htm

     地理编码示例：

     网页调用：

C#代码实现：

 /// <summary>
         /// 地址编码
         /// </summary>
         /// <param name="ak">百度密钥</param>
         /// <param name="address">详细地址</param>
         /// <param name="city">城市</param>
         /// <returns></returns>
         public string GeoEncoding(string ak, string address,string city)
         {
             string json = ",";
             try
             {
                 WebClient client = new WebClient();
                 client.Encoding = UTF8Encoding.UTF8;
                 string url = String.Format("http://api.map.baidu.com/geocoder/v2/?ak={0}&address={1}&city={2}&output=json", ak, address, city);

                 //将返回的json数据转为JSON对象
                 JObject jo = ((JObject)JsonConvert.DeserializeObject(client.DownloadString(url)));
                 string status = jo["status"].ToString();
                 if (status == "")
                 {
                     //正常返回
                     json = jo["result"]["location"]["lat"].ToString() + "," + jo["result"]["location"]["lng"].ToString();
                 }
             }
             catch(Exception ex)
             {
                 //异常处理
             }
             return json;
         }

逆地址编码示例：

网页调用：

C#代码实现：

 /// <summary>
         /// 逆地址编码
         /// </summary>
         /// <param name="ak">百度密钥</param>
         /// <param name="longitude">经度</param>
         /// <param name="latitude">纬度</param>
         /// <returns></returns>
         public string GeoDecoding(string ak, string longitude, string latitude)
         {
             string json = "";
             try
             {
                 WebClient client = new WebClient();
                 client.Encoding = UTF8Encoding.UTF8;
                 string url = String.Format("http://api.map.baidu.com/geocoder/v2/?ak={0}&location={1},{2}&output=json", ak, longitude, latitude);

                 //将返回的json数据转为JSON对象
                 JObject jo = ((JObject)JsonConvert.DeserializeObject(client.DownloadString(url)));
                 string status = jo["status"].ToString();
                 if (status == "")
                 {
                     //正常返回
                     json = jo["result"]["formatted_address"].ToString() ;
                 }
             }
             catch (Exception ex)
             {
                 //异常处理
             }
             return json;
         }