C# 获取内网或公网IPAddress

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内网IPAddress

public static string InternalNetworkIpAddress{    get    {        var iPAddresses =            Dns                .GetHostAddresses(Dns.GetHostName())                .Where(ip =>                    ip.GetAddressBytes().Length == 4                )                .Select(iPAddress =>                    iPAddress                );        return string.Join(", ", iPAddresses);    }}

公网IPAddress

public static string ExternalNetworkIpAddress{    get    {        return GetExternalNetworkIpAddress();    }}private static string GetExternalNetworkIpAddress(){    const string message = "获取失败";    const string url = "http://1212.ip138.com/ic.asp";    try    {        var webRequest = WebRequest.Create(url);        webRequest.Timeout = 10000;        var stream = webRequest.GetResponse().GetResponseStream();        var streamReader = new StreamReader(stream);        var readValue = streamReader.ReadToEnd();        const string pattern = @"([\d]{1,3}\.){3}[\d]{1,3}";        var match = Regex.Match(readValue, pattern);        return match.Success ? match.Value : message;    }    catch (Exception)    {        return message;    }}

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