根据名称获取经纬度

 1  try
 2             {
 3                 #region MyRegion
 4 
 5                 string ak = "BfH08PCAsZ8SfbiXXEXRkSzn4MA00Mdk";
 6                 var _name = row["hospital_name"];
 7                 var _proName = row["province"];
 8                 var _city = row["city"];
 9                 //var address = row["address"];
10                 var urlName = string.Format("{0},{1},{2}", _proName, _city, _name);
11                 //pois 是否搜索周边 0或1
12                 //string Url = @"http://api.map.baidu.com/geocoding/v3/?address=" + urlName + "&output=json&ak=" + ak + "&callback = showLocation";
13                 //HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
15                 string Url = "http://api.map.baidu.com/geocoder?address={0}&output=json&key=BfH08PCAsZ8SfbiXXEXRkSzn4MA00Mdk";
16                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(string.Format(Url, urlName));
17                 request.KeepAlive = false;
18                 request.Method = "GET";
19 
20                // request.ContentType = "application/json";
21                 HttpWebResponse response = (HttpWebResponse)request.GetResponse();


29                 #region MyRegion
30                 Stream myResponseStream = response.GetResponseStream();
31                // StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
32                 StreamReader myStreamReader = new StreamReader(myResponseStream);
33                 string responseString = myStreamReader.ReadToEnd();
34                 myStreamReader.Close();
35                 myResponseStream.Close();
36                 response.Close();
37                 request.Abort();
38 
39                 //JObject obj_RawData = (JObject)(JsonConvert.DeserializeObject(responseString));
40                 //JObject obj_Result = (JObject)(JsonConvert.DeserializeObject(obj_RawData["result"].ToString()));
41                 //JObject obj_Loaction = (JObject)(JsonConvert.DeserializeObject(obj_Result["location"].ToString()));
42                 //string lng = obj_Loaction["lng"].ToString(); //经度值
43                 //string lat = obj_Loaction["lat"].ToString(); //纬度值
44 
45                 #endregion
46                 JObject jo = (JObject)JsonConvert.DeserializeObject(responseString);
47                 //有些地址是查询不出来result的,因此要做个判断
48                 string lat = "", lng = "";
49                 if (string.Equals(jo["status"].ToString(), "OK") && jo["result"].ToString() != "[]")
50                 {
51                     lat = jo["result"]["location"]["lat"].ToString();
52                     lng = jo["result"]["location"]["lng"].ToString();
53                 }
54                 #endregion
55                 arrys = new string[] { lng, lat };
56                 result.response = arrys;
57             }
58             catch (Exception ex) { result.msg = ex.ToString(); }