获取IP地址-根据IP获取位置信息

获取外网IP地址，并得到该地址所在位置；

如：101.249.255.255

对应：西藏自治区-拉萨市-堆龙德庆区

string ipAddress = GetIPAddress();
string location = GetIPLocation(ipAddress);

        /// <summary>/// 获取IP地址/// </summary>/// <returns></returns>public static string GetIPAddress(){try{//此接口查询速度最快var html2 = HttpGetPageHtml("http://www.net.cn/static/customercare/yourip.asp", "gbk");var ip2 = GetIPFromHtml(html2);if (!String.IsNullOrEmpty(ip2)) return ip2;return "";}catch (System.Exception ex){mzRunLog.RunlogDebug ("获取IP地址错误：" + ex.Message);return "";}}

        /// <summary>/// 根据IP获取我们所要的信息/// </summary>/// <param name="strIp"></param>/// <returns></returns>public static string GetIPLocation(string strIp){try{if (strIp == "")return "";string html = HttpGetPageHtml("https://www.ip138.com/iplookup.asp?ip=" + strIp + "&action=2", "gb2312");string pre = "var ip_result = {\"ASN归属地\":\"";int pos = html.IndexOf(pre);html = html.Substring(pos + pre.Length);html = html.Substring(0, html.IndexOf(' ')).Replace("移动", "").Replace("联通", "").Replace("电信", "");//string[] res = html.Split(new char[] { '省', '市', ' ' }, StringSplitOptions.RemoveEmptyEntries);String regex = "(?<province>[^省]+省|.+自治区)(?<city>[^自治州]+自治州|[^市]+市|[^盟]+盟|[^地区]+地区|.+区划)(?<county>[^市]+市|[^县]+县|[^旗]+旗|.+区)?(?<town>[^区]+区|.+镇)?(?<village>.*)";// 使用正则表达式匹配省、市、区、镇和村Match match = Regex.Match(html, regex);if (match.Success){string province = match.Groups["province"].Value;string city = match.Groups["city"].Value;string county = match.Groups["county"].Value;//string town = match.Groups["town"].Value;//string village = match.Groups["village"].Value;//Console.WriteLine("省：" + province);//Console.WriteLine("市：" + city);//Console.WriteLine("区/县：" + county);//Console.WriteLine("镇：" + town);//Console.WriteLine("村/街道：" + village);return city;}return "";}catch (System.Exception ex){mzRunLog.RunlogDebug("获取位置信息错误：" + ex.Message);return "";}}

 获取网页信息，解析获取网页中IP地址

        /// <summary>/// 获取页面html/// </summary>/// <param name="url">请求的地址</param>/// <param name="encoding">编码方式</param>/// <returns></returns>private static string HttpGetPageHtml(string url, string encoding){string pageHtml = string.Empty;try{using (WebClient MyWebClient = new WebClient()){Encoding encode = Encoding.GetEncoding(encoding);MyWebClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36");MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据Byte[] pageData = MyWebClient.DownloadData(url); //从指定网站下载数据pageHtml = encode.GetString(pageData);}}catch (Exception ex){throw ex;}return pageHtml;}/// <summary>/// 从html中通过正则找到ip信息(只支持ipv4地址)/// </summary>/// <param name="pageHtml"></param>/// <returns></returns>private static string GetIPFromHtml(String pageHtml){//验证ipv4地址string reg = @"(?:(?:(25[0-5])|(2[0-4]\d)|((1\d{2})|([1-9]?\d)))\.){3}(?:(25[0-5])|(2[0-4]\d)|((1\d{2})|([1-9]?\d)))";string ip = "";Match m = Regex.Match(pageHtml, reg);if (m.Success){ip = m.Value;}return ip;}

参考：

.Net/C# --- 根据Ip获取地址信息

正则表达式 划分省市区（直辖市和附详细地址包括市，区）