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：

 1 /// <summary>
 2         /// 地址编码
 3         /// </summary>
 4         /// <param name="ak">百度密钥</param>
 5         /// <param name="address">详细地址</param>
 6         /// <param name="city">城市</param>
 7         /// <returns></returns>
 8         public string GeoEncoding(string ak, string address,string city)
 9         {
10             string json = ",";
11             try
12             {
13                 WebClient client = new WebClient();
14                 client.Encoding = UTF8Encoding.UTF8; 
15                 string url = String.Format("http://api.map.baidu.com/geocoder/v2/?ak={0}&address={1}&city={2}&output=json", ak, address, city);
16 
17                 //将返回的json数据转为JSON对象
18                 JObject jo = ((JObject)JsonConvert.DeserializeObject(client.DownloadString(url)));
19                 string status = jo["status"].ToString();
20                 if (status == "0")
21                 {
22                     //正常返回
23                     json = jo["result"]["location"]["lat"].ToString() + "," + jo["result"]["location"]["lng"].ToString();
24                 }
25             }
26             catch(Exception ex)
27             {
28                 //异常处理
29             }
30             return json;
31         }

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