C#获取本机IP地址（ipv4）

 string name = Dns.GetHostName();  IPAddress[] ipadrlist = Dns.GetHostAddresses(name); 

string name = Dns.GetHostName(); IPAddress[] ipadrlist = Dns.GetHostAddresses(name); foreach (IPAddress ipa in ipadrlist) {   if (ipa.AddressFamily == AddressFamily.InterNetwork)   Console.Writeline(ipa.ToString()); }

/// <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>  /// 获取本机主DNS  /// </summary>  /// <returns></returns>  public static string GetPrimaryDNS()  {  string result = RunApp("nslookup", "",true);  Match m = Regex.Match(result, @"/d+/./d+/./d+/./d+");  if (m.Success)  {   return m.Value;  }  else  {   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();   //}   //上面标记的是原文，下面是我自己调试错误后自行修改的   Thread.Sleep(100);  //貌似调用系统的nslookup还未返回数据或者数据未编码完成，程序就已经跳过直接执行       //txt = sr.ReadToEnd()了，导致返回的数据为空，故睡眠令硬件反应   if (!proc.HasExited)  //在无参数调用nslookup后，可以继续输入命令继续操作，如果进程未停止就直接执行   {    //txt = sr.ReadToEnd()程序就在等待输入，而且又无法输入，直接掐住无法继续运行    proc.Kill();   }   string txt = sr.ReadToEnd();   sr.Close();   if (recordLog)    Trace.WriteLine(txt);   return txt;   }  }  catch (Exception ex)  {   Trace.WriteLine(ex);   return ex.Message;  }  }

private void GetIP()  {  Process cmd = new Process();  cmd.StartInfo.FileName = "ipconfig.exe";//设置程序名  cmd.StartInfo.Arguments = "/all"; //参数  //重定向标准输出  cmd.StartInfo.RedirectStandardOutput = true;  cmd.StartInfo.RedirectStandardInput = true;  cmd.StartInfo.UseShellExecute = false;  cmd.StartInfo.CreateNoWindow = true;//不显示窗口（控制台程序是黑屏）  //cmd.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;//暂时不明白什么意思  /*  收集一下 有备无患  关于:ProcessWindowStyle.Hidden隐藏后如何再显示？  hwndWin32Host = Win32Native.FindWindow(null, win32Exinfo.windowsName);  Win32Native.ShowWindow(hwndWin32Host, 1); //先FindWindow找到窗口后再ShowWindow  */  cmd.Start();  string info = cmd.StandardOutput.ReadToEnd();  cmd.WaitForExit();  cmd.Close();  textBox1.AppendText(info);  }