C# 获取内网或公网IPAddress

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; } }