IPAddress クラス

.NET Framework クラス ライブラリ リファレンス

IPAddress クラス

インターネット プロトコル (IP: Internet Protocol) アドレスを提供します。

名前空間: System.Net
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

<SerializableAttribute> _
Public Class IPAddress

Visual Basic (使用法)

Dim instance As IPAddress

C#

[SerializableAttribute] 
public class IPAddress

C++

[SerializableAttribute] 
public ref class IPAddress

J#

/** @attribute SerializableAttribute() */ 
public class IPAddress

JScript

SerializableAttribute 
public class IPAddress

解説

IPAddress クラスは、IP ネットワーク上のコンピュータのアドレスを格納します。

使用例

サーバーに問い合わせて、ファミリ アドレスおよびそのサーバーがサポートする IP アドレスを取得する方法を次の例に示します。

Visual Basic

' This program shows how to use the IPAddress class to obtain a server
 
' IP addressess and related information.
Imports System
Imports System.Net
Imports System.Net.Sockets
Imports System.Text.RegularExpressions
Imports Microsoft.VisualBasic


Namespace Mssc.Services.ConnectionManagement
  Module M_TestIPAddress

    Class TestIPAddress

      'The IPAddresses method obtains the selected server IP address
 information.
      'It then displays the type of address family supported by the
 server and 
      'its IP address in standard and byte format.
      Private Shared Sub
 IPAddresses(ByVal server As String)
        Try
          Dim ASCII As New
 System.Text.ASCIIEncoding()

          ' Get server related information.
          Dim heserver As IPHostEntry = Dns.Resolve(server)

          ' Loop on the AddressList
          Dim curAdd As IPAddress
          For Each curAdd In
 heserver.AddressList

            ' Display the type of address family supported by the server.
 If the
            ' server is IPv6-enabled this value is: InternNetworkV6.
 If the server
            ' is also IPv4-enabled there will be an additional value
 of InterNetwork.
            Console.WriteLine(("AddressFamily: " +
 curAdd.AddressFamily.ToString()))

            ' Display the ScopeId property in case of IPV6 addresses.
            If curAdd.AddressFamily.ToString() = ProtocolFamily.InterNetworkV6.ToString()
 Then
              Console.WriteLine(("Scope Id: " + curAdd.ScopeId.ToString()))
            End If

            ' Display the server IP address in the standard format.
 In 
            ' IPv4 the format will be dotted-quad notation, in IPv6
 it will be
            ' in in colon-hexadecimal notation.
            Console.WriteLine(("Address: " + curAdd.ToString()))

            ' Display the server IP address in byte format.
            Console.Write("AddressBytes: ")



            Dim bytes As [Byte]() = curAdd.GetAddressBytes()
            Dim i As Integer
            For i = 0 To bytes.Length - 1
              Console.Write(bytes(i))
            Next i
            Console.WriteLine(ControlChars.Cr + ControlChars.Lf)
          Next curAdd 

        Catch e As Exception
          Console.WriteLine(("[DoResolve] Exception: "
 + e.ToString()))
        End Try
      End Sub 'IPAddresses


      ' This IPAddressAdditionalInfo displays additional server address
 information.
      Private Shared Sub
 IPAddressAdditionalInfo()
        Try
          ' Display the flags that show if the server supports IPv4
 or IPv6
          ' address schemas.
          Console.WriteLine((ControlChars.Cr + ControlChars.Lf + "SupportsIPv4:
 " + Socket.SupportsIPv4.ToString()))
          Console.WriteLine(("SupportsIPv6: " + Socket.SupportsIPv6.ToString()))

          If Socket.SupportsIPv6 Then
            ' Display the server Any address. This IP address indicates
 that the server 
            ' should listen for client activity on all network interfaces.
 
            Console.WriteLine((ControlChars.Cr + ControlChars.Lf + "IPv6Any:
 " + IPAddress.IPv6Any.ToString()))

            ' Display the server loopback address. 
            Console.WriteLine(("IPv6Loopback: " +
 IPAddress.IPv6Loopback.ToString()))

            ' Used during autoconfiguration first phase.
            Console.WriteLine(("IPv6None: " + IPAddress.IPv6None.ToString()))

            Console.WriteLine(("IsLoopback(IPv6Loopback): "
 + IPAddress.IsLoopback(IPAddress.IPv6Loopback).ToString()))
          End If
          Console.WriteLine(("IsLoopback(Loopback): "
 + IPAddress.IsLoopback(IPAddress.Loopback).ToString()))
        Catch e As Exception
          Console.WriteLine(("[IPAddresses] Exception: "
 + e.ToString()))
        End Try
      End Sub 'IPAddressAdditionalInfo

      Public Shared Sub
 Main(ByVal args() As String)
        Dim server As String
 = Nothing

        ' Define a regular expression to parse user's input.
        ' This is a security check. It allows only
        ' alphanumeric input string between 2 to 40 character long.
        'Define a regular expression to parse user's input.
        'This is a security check. It allows only
        'alphanumeric input string between 2 to 40 character long.
        Dim rex As New Regex("^[a-zA-Z]\w{1
,39}$")

        If args.Length < 1 Then
          ' If no server name is passed as an argument to this program,
 use the current 
          ' server name as default.
          server = Dns.GetHostName()
          Console.WriteLine(("Using current host: "
 + server))
        Else
          server = args(0)
          If Not rex.Match(server).Success
 Then
            Console.WriteLine("Input string format not allowed.")
            Return
          End If
        End If

        ' Get the list of the addresses associated with the requested
 server.
        IPAddresses(server)

        ' Get additonal address information.
        IPAddressAdditionalInfo()
      End Sub 'Main
    End Class 'TestIPAddress
  End Module
End Namespace

C#

// This program shows how to use the IPAddress class to obtain a server
 
// IP addressess and related information.

using System;
using System.Net;
using System.Net.Sockets;
using System.Text.RegularExpressions;

namespace Mssc.Services.ConnectionManagement
{

  class TestIPAddress 
  {

    /**
      * The IPAddresses method obtains the selected server IP address information.
      * It then displays the type of address family supported by the server and its
 
      * IP address in standard and byte format.
      **/
    private static void
 IPAddresses(string server) 
    {
      try 
      {
        System.Text.ASCIIEncoding ASCII = new System.Text.ASCIIEncoding();
  
        // Get server related information.
        IPHostEntry heserver = Dns.Resolve(server);

        // Loop on the AddressList
        foreach (IPAddress curAdd in heserver.AddressList)
 
        {


          // Display the type of address family supported by the server.
 If the
          // server is IPv6-enabled this value is: InternNetworkV6.
 If the server
          // is also IPv4-enabled there will be an additional value
 of InterNetwork.
          Console.WriteLine("AddressFamily: " + curAdd.AddressFamily.ToString());
          
          // Display the ScopeId property in case of IPV6 addresses.
          if(curAdd.AddressFamily.ToString() == ProtocolFamily.InterNetworkV6.ToString())
            Console.WriteLine("Scope Id: " + curAdd.ScopeId.ToString());


          // Display the server IP address in the standard format. In
 
          // IPv4 the format will be dotted-quad notation, in IPv6 it
 will be
          // in in colon-hexadecimal notation.
          Console.WriteLine("Address: " + curAdd.ToString());
        
          // Display the server IP address in byte format.
          Console.Write("AddressBytes: ");



          Byte[] bytes = curAdd.GetAddressBytes();
          for (int i = 0; i < bytes.Length;
 i++) 
          {
            Console.Write(bytes[i]);
          }                          

          Console.WriteLine("\r\n");

        }

      }
      catch (Exception e) 
      {
        Console.WriteLine("[DoResolve] Exception: " + e.ToString());
      }
    }

    // This IPAddressAdditionalInfo displays additional server address
 information.
    private static void
 IPAddressAdditionalInfo() 
    {
      try 
      {
        // Display the flags that show if the server supports IPv4 or
 IPv6
        // address schemas.
        Console.WriteLine("\r\nSupportsIPv4: " + Socket.SupportsIPv4);
        Console.WriteLine("SupportsIPv6: " + Socket.SupportsIPv6);

        if (Socket.SupportsIPv6)
        {
          // Display the server Any address. This IP address indicates
 that the server 
          // should listen for client activity on all network interfaces.
 
          Console.WriteLine("\r\nIPv6Any: " + IPAddress.IPv6Any.ToString());

          // Display the server loopback address. 
          Console.WriteLine("IPv6Loopback: " + IPAddress.IPv6Loopback.ToString());
      
          // Used during autoconfiguration first phase.
          Console.WriteLine("IPv6None: " + IPAddress.IPv6None.ToString());
      
          Console.WriteLine("IsLoopback(IPv6Loopback): " + IPAddress.IsLoopback(IPAddress.IPv6Loopback));
        }
        Console.WriteLine("IsLoopback(Loopback): " + IPAddress.IsLoopback(IPAddress.Loopback));
      }
      catch (Exception e) 
      {
        Console.WriteLine("[IPAddresses] Exception: " + e.ToString());
      }
    }


    public static void Main(string[]
 args) 
    {
      string server = null;
    
      // Define a regular expression to parse user's input.
      // This is a security check. It allows only
      // alphanumeric input string between 2 to 40 character long.
      Regex rex = new Regex(@"^[a-zA-Z]\w{1,39}$");

      if (args.Length < 1)
      {
        // If no server name is passed as an argument to this program,
 use the current 
        // server name as default.
        server = Dns.GetHostName();
        Console.WriteLine("Using current host: " + server);
      }
      else
      {
        server = args[0];
        if (!(rex.Match(server)).Success)
        {
          Console.WriteLine("Input string format not allowed.");
          return;
        }
      }

      // Get the list of the addresses associated with the requested
 server.
      IPAddresses(server);
    
      // Get additonal address information.
      IPAddressAdditionalInfo();
    }

  }
}

J#

// This program shows how to use the IPAddress class to obtain a server
 
// IP addressess and related information.
import System.*;
import System.Net.*;
import System.Net.Sockets.*;
import System.Text.RegularExpressions.*;

class TestIPAddress
{
    /**
       The IPAddresses method obtains the selected server IP address 
       information.It then displays the type of address family supported by 
       the server and its IP address in standard and byte format.
     */
    private static void
 IPAddresses(String server)
    {
        try {
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();

            // Get server related information.
            IPHostEntry heserver = Dns.Resolve(server);
            // Loop on the AddressList
            for (int iCtr = 0; iCtr < heserver.get_AddressList().length;
                iCtr++) {            
                IPAddress curAdd = heserver.get_AddressList()[iCtr];

                // Display the type of address family supported by the
 server. 
                // If the server is IPv6-enabled this value is:InternNetworkV6.
                // If the server is also IPv4-enabled there will be
 an 
                // additional value of InterNetwork.
                Console.WriteLine(("AddressFamily: " 
                    + curAdd.get_AddressFamily().ToString()));

                // Display the ScopeId property in case of IPV6 addresses.
                if (curAdd.get_AddressFamily().ToString().equals(
                        ProtocolFamily.InterNetworkV6.ToString())) {
                    Console.WriteLine(("Scope Id: " 
                        +(new Long(curAdd.get_ScopeId())).ToString()));
                }

                // Display the server IP address in the standard format. In
 
                // IPv4 the format will be dotted-quad notation, in
 IPv6 
                // it will be in in colon-hexadecimal notation.
                Console.WriteLine(("Address: " + curAdd.ToString()));
                // Display the server IP address in byte format.
                Console.Write("AddressBytes: ");

                ubyte bytes[] = curAdd.GetAddressBytes();
                for (int i = 0; i < bytes.length;
 i++) {
                    Console.Write(bytes[i]);
                }
                Console.WriteLine("\r\n");
            }
        }
        catch (System.Exception e) {
            Console.WriteLine(("[DoResolve] Exception: " + e.ToString()));
        }    
    } //IPAddresses

    // This IPAddressAdditionalInfo displays additional server address
 
    // information.
    private static void
 IPAddressAdditionalInfo()
    {
        try {
            // Display the flags that show if the server supports IPv4 or
 IPv6
            // address schemas.
            Console.WriteLine("\r\nSupportsIPv4: " 
                + System.Convert.ToString(Socket.get_SupportsIPv4()));
            Console.WriteLine("SupportsIPv6: " 
                + System.Convert.ToString(Socket.get_SupportsIPv6()));
            if (Socket.get_SupportsIPv6()) {
                // Display the server Any address. This IP address indicates
 
                // that the server should listen for client activity
 on all 
                // network interfaces. 
                Console.WriteLine(("\r\nIPv6Any: " 
                    + (IPAddress.IPv6Any).ToString()));

                // Display the server loopback address. 
                Console.WriteLine(("IPv6Loopback: "
                    + (IPAddress.IPv6Loopback).ToString()));

                // Used during autoconfiguration first phase.
                Console.WriteLine(("IPv6None: " 
                    + (IPAddress.IPv6None).ToString()));
                Console.WriteLine(("IsLoopback(IPv6Loopback): " 
                    + IPAddress.IsLoopback(IPAddress.IPv6Loopback)));
            }
            Console.WriteLine(("IsLoopback(Loopback): " 
                + System.Convert.ToString(IPAddress.
                IsLoopback(IPAddress.Loopback))));
        }
        catch (System.Exception e) {
            Console.WriteLine(("[IPAddresses] Exception: " + e.ToString()));
        } 
    } //IPAddressAdditionalInfo

    public static void main(String[]
 args)
    {
        String server = null;
        // Define a regular expression to parse user's input.
        // This is a security check. It allows only
        // alphanumeric input string between 2 to 40 character long.
        Regex rex = new Regex("^[a-zA-Z]\\w{1,39}$");
        if (args.length < 1) {
            // If no server name is passed as an argument to this program,
 
            // use the current server name as default.
            server = Dns.GetHostName();
            Console.WriteLine(("Using current host: " + server));
        } 
        else {
            server = args[0];
            if (!(rex.Match(server).get_Success())) {
                Console.WriteLine("Input string format not
 allowed.");
                return;
            } 
        } 
        // Get the list of the addresses associated with the requested
 server.
        IPAddresses(server);

        // Get additonal address information.
        IPAddressAdditionalInfo();
    } //main
} //TestIPAddress

継承階層

System.Object
  System.Net.IPAddress

スレッド セーフ

この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバの場合は、スレッド セーフであるとは限りません。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
IPAddress メンバ
System.Net 名前空間