获取本机IP_考虑多网卡的情况

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Diagnostics;using System.Text.RegularExpressions;namespace _09获取本机IP_考虑多网卡_{    class Program    {        static void Main(string[] args)        {            Console.WriteLine(GetLocalIP());            Console.ReadKey();        }        /// <summary>        /// 获取当前使用的IP        /// </summary>        /// <returns></returns>        public static string GetLocalIP()        {            string result = RunApp("route", "print", true);            Match m = Regex.Match(result, @"0.0.0.0\s+0.0.0.0\s+(\d+.\d+.\d+.\d+)\s+(\d+.\d+.\d+.\d+)");            if (m.Success)            {                return m.Groups[2].Value;            }            else            {                try                {                    System.Net.Sockets.TcpClient c = new System.Net.Sockets.TcpClient();                    c.Connect("www.baidu.com", 80);                    string ip = ((System.Net.IPEndPoint)c.Client.LocalEndPoint).Address.ToString();                    c.Close();                    return ip;                }                catch (Exception)                {                    return null;                }            }        }        /// <summary>        /// 运行一个控制台程序并返回其输出参数。        /// </summary>        /// <param name="filename">程序名</param>        /// <param name="arguments">输入参数</param>        /// <returns></returns>        public static string RunApp(string filename, string arguments, bool recordLog)        {            try            {                if (recordLog)                {                    Trace.WriteLine(filename + " " + arguments);                }                Process proc = new Process();                proc.StartInfo.FileName = filename;                proc.StartInfo.CreateNoWindow = true;                proc.StartInfo.Arguments = arguments;                proc.StartInfo.RedirectStandardOutput = true;                proc.StartInfo.UseShellExecute = false;                proc.Start();                using (System.IO.StreamReader sr = new System.IO.StreamReader(proc.StandardOutput.BaseStream, Encoding.Default))                {                    string txt = sr.ReadToEnd();                    sr.Close();                    if (recordLog)                    {                        Trace.WriteLine(txt);                    }                    if (!proc.HasExited)                    {                        proc.Kill();                    }                    return txt;                }            }            catch (Exception ex)            {                Trace.WriteLine(ex);                return ex.Message;            }        }    }}