ip-api.com接口（解析 json需要引入Newtonsoft.Json.dll ）：

/// <summary> /// 根据IP 获取物理地址 /// </summary> /// <param name="ip">Ip地址</param> /// <returns></returns> public static string GetIpAddress(string ip) { string url = "http://ip-api.com/json/"+ip+"?lang=zh-CN"; string result = ""; WebRequest wrt = null; WebResponse wrp = null; try { wrt = WebRequest.Create(url); wrt.Credentials = CredentialCache.DefaultCredentials; wrp = wrt.GetResponse(); StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.UTF8); //获取到的是Json数据 string html = sr.ReadToEnd(); //Newtonsoft.Json读取数据 JObject obj = JsonConvert.DeserializeObject<JObject>(html); string city = obj["city"].ToString(); string province = obj["regionName"].ToString(); result = city.Equals(province) ? city : (province + city); } catch (Exception) { } finally { if (wrp != null) wrp.Close(); if (wrt != null) wrt.Abort(); } return result; }

126.net接口： 

/// <summary> /// 根据IP 获取物理地址 /// </summary> /// <param name="ip">Ip地址</param> /// <returns></returns> public static string GetstringIpAddress(string ip) { string url = "http://ip.ws.126.net/ipquery?ip="+ip; string result=""; WebRequest wrt = null; WebResponse wrp = null; try { wrt = WebRequest.Create(url); wrt.Credentials = CredentialCache.DefaultCredentials; wrp = wrt.GetResponse(); StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.Default); //获取到的数据格式：var lo="江苏省", lc="镇江市"; var localAddress={city:"镇江市", province:"江苏省"} string html = sr.ReadToEnd(); string pattern = "{city:\"(?<key1>.*?)\", province:\"(?<key2>.*?)\"}"; Regex regex = new Regex(pattern, RegexOptions.None); Match match = regex.Match(html); string city=match.Groups["key1"].Value; string province=match.Groups["key2"].Value; result = city.Equals(province) ? city : (province + city); } catch (Exception) { } finally { if (wrp != null) wrp.Close(); if (wrt != null) wrt.Abort(); } return result; }

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