获取本机IP(考虑多块网卡、虚拟机等复杂情况)

 

方法1:

基本思路:

通过查询本机路由表,获取访问默认网关时使用的网卡IP地址。该方法在有网络的情况下适应性较好,如果本身不连接到互联网,则无法获取。

代码如下:

   1:          /// <summary>
   2:          /// 获取当前使用的IP
   3:          /// </summary>
   4:          /// <returns></returns>
   5:          public static string GetLocalIP()
   6:          {
   7:              string result = RunApp("route", "print", true);
   8:              Match m = Regex.Match(result, @"0.0.0.0\s+0.0.0.0\s+(\d+.\d+.\d+.\d+)\s+(\d+.\d+.\d+.\d+)");
   9:              if (m.Success)
  10:              {
  11:                  return m.Groups[2].Value;
  12:              }
  13:              else
  14:              {
  15:                  try
  16:                  {
  17:                      System.Net.Sockets.TcpClient c = new System.Net.Sockets.TcpClient();
  18:                      c.Connect("www.baidu.com", 80);
  19:                      string ip = ((System.Net.IPEndPoint)c.Client.LocalEndPoint).Address.ToString();
  20:                      c.Close();
  21:                      return ip;
  22:                  }
  23:                  catch (Exception)
  24:                  {
  25:                      return null;
  26:                  }
  27:              }
  28:          }
  29:   
  30:          /// <summary>
  31:          /// 获取本机主DNS
  32:          /// </summary>
  33:          /// <returns></returns>
  34:          public static string GetPrimaryDNS()
  35:          {
  36:              string result = RunApp("nslookup", "", true);
  37:              Match m = Regex.Match(result, @"\d+\.\d+\.\d+\.\d+");
  38:              if (m.Success)
  39:              {
  40:                  return m.Value;
  41:              }
  42:              else
  43:              {
  44:                  return null;
  45:              }
  46:          }
  47:   
  48:          /// <summary>
  49:          /// 运行一个控制台程序并返回其输出参数。
  50:          /// </summary>
  51:          /// <param name="filename">程序名</param>
  52:          /// <param name="arguments">输入参数</param>
  53:          /// <returns></returns>
  54:          public static string RunApp(string filename, string arguments, bool recordLog)
  55:          {
  56:              try
  57:              {
  58:                  if (recordLog)
  59:                  {
  60:                      Trace.WriteLine(filename + " " + arguments);
  61:                  }
  62:                  Process proc = new Process();
  63:                  proc.StartInfo.FileName = filename;
  64:                  proc.StartInfo.CreateNoWindow = true;
  65:                  proc.StartInfo.Arguments = arguments;
  66:                  proc.StartInfo.RedirectStandardOutput = true;
  67:                  proc.StartInfo.UseShellExecute = false;
  68:                  proc.Start();
  69:   
  70:                  using (System.IO.StreamReader sr = new System.IO.StreamReader(proc.StandardOutput.BaseStream, Encoding.Default))
  71:                  {
  72:                      string txt = sr.ReadToEnd();
  73:                      sr.Close();
  74:                      if (recordLog)
  75:                      {
  76:                          Trace.WriteLine(txt);
  77:                      }
  78:                      if (!proc.HasExited)
  79:                      {
  80:                          proc.Kill();
  81:                      }
  82:                      return txt;
  83:                  }
  84:              }
  85:              catch (Exception ex)
  86:              {
  87:                  Trace.WriteLine(ex);
  88:                  return ex.Message;
  89:              }
  90:          }
posted @ 2012-09-17 15:39  ChaoSimple  阅读(2224)  评论(0编辑  收藏  举报