C#获取本地IP的四种方式示例详解

/// <summary>
  /// 网络不通畅可以获取
  /// 不过能获取到具体的IP
  /// </summary>
  /// <returns></returns>
  public static List<IPAddress> GetByGetHostAddresses()
  {
   try
   {
    IPAddress[] adds = Dns.GetHostAddresses(Dns.GetHostName());
    return adds == null || adds.Length == 0 ? new List<IPAddress>() : adds.ToList<IPAddress>();
   }
   catch (Exception)
   {
    return new List<IPAddress>();

   }
  }

/// <summary>
  /// 只有网络通畅才能获取
  /// </summary>
  /// <returns></returns>
  public static List<IPAddress> GetByManagementClass()
  {
   try
   {
    ManagementClass mClass = new System.Management.ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection managementObjectCollection = mClass.GetInstances();
    List<IPAddress> ls = new List<IPAddress>();
    foreach (var item in managementObjectCollection)
    {
     if ((bool)item["IPEnabled"] == true)
     {
      foreach (var ip in (string[])item["IPAddress"])
      {
       IPAddress ipout = null;
       IPAddress.TryParse(ip, out ipout);
       if (ipout != null)
       {

        ls.Add(ipout);
       }
      }
     }
    }
    return ls;
   }
   catch (Exception)
   {
    return new List<IPAddress>();

   }
  }

public static List<IPAddress> GetByCMD()
  {
   try
   {
    Process cmd = new Process();
    cmd.StartInfo.FileName = "ipconfig.exe";
    cmd.StartInfo.Arguments = "/all";
    cmd.StartInfo.RedirectStandardOutput = true;
    cmd.StartInfo.RedirectStandardInput = true;
    cmd.StartInfo.UseShellExecute = false;
    cmd.StartInfo.CreateNoWindow = true;
    cmd.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
    cmd.Start();
    string info = "";
    List<IPAddress> ls = new List<IPAddress>();
    // info = cmd.StandardOutput.ReadToEnd();
    Regex validipregex = new Regex(@"\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}");
    //new Regex(@"^(([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$");
    while ((info = cmd.StandardOutput.ReadLine()) != null)
    {
     IPAddress ip = null;
     Console.WriteLine(info);
     info = validipregex.Match(info).Value;

     IPAddress.TryParse(info, out ip);

     if (ip != null)
     {
      ls.Add(ip);
     }
    }

    cmd.WaitForExit();
    cmd.Close();
    return ls;
   }
   catch (Exception)
   {
    return new List<IPAddress>();

   }
  }

/// <summary>
  /// 无论网络通不通都能获取到Ip
  /// </summary>
  /// <returns></returns>
  public static List<IPAddress> GetByNetworkInterface()
  {
   try
   {
    NetworkInterface[] intf = NetworkInterface.GetAllNetworkInterfaces();
    List<IPAddress> ls = new List<IPAddress>();
    foreach (var item in intf)
    {
     IPInterfaceProperties adapterPropertis = item.GetIPProperties();
     UnicastIPAddressInformationCollection coll = adapterPropertis.UnicastAddresses;
     foreach (var col in coll)
     {
      ls.Add(col.Address);
     }
    }
    return ls;
   }
   catch (Exception)
   {
    return new List<IPAddress>();

   }
  }