通过经纬度获取经纬度地址

protected void Page_Load(object sender, EventArgs e)
        {
           string url= "http://api.map.baidu.com/geocoder/v2/?ak=****&callback=renderReverse&location=39.983424,116.322987&output=json";
           Response.Write(CreateGetHttpResponse(url));
        }

        /// <summary>
        /// 创建GET方式的HTTP请求
        /// </summary>
        public static string CreateGetHttpResponse(string url)
        {

            System.Net.HttpWebRequest request;
            // 创建一个HTTP请求
            request = (System.Net.HttpWebRequest)WebRequest.Create(url);
            //request.Method="get";
            System.Net.HttpWebResponse response;
            response = (System.Net.HttpWebResponse)request.GetResponse();
            System.IO.StreamReader myreader = new System.IO.StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string responseText = myreader.ReadToEnd();
            myreader.Close();
            return responseText;
        }

逆地理编码专属请求参数：