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IPAddress Class
Visual Studio 2010
Provides an Internet Protocol (IP) address.
Assembly: System (in System.dll)
The IPAddress type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | IPAddress(Byte[]) | Initializes a new instance of the IPAddress class with the address specified as a Byte array. |
![]() | IPAddress(Int64) | Initializes a new instance of the IPAddress class with the address specified as an Int64. |
![]() | IPAddress(Byte[], Int64) | Initializes a new instance of the IPAddress class with the address specified as a Byte array and the specified scope identifier. |
| Name | Description | |
|---|---|---|
![]() | Address | Obsolete. An Internet Protocol (IP) address. |
![]() | AddressFamily | Gets the address family of the IP address. |
![]() | IsIPv6LinkLocal | Gets whether the address is an IPv6 link local address. |
![]() | IsIPv6Multicast | Gets whether the address is an IPv6 multicast global address. |
![]() | IsIPv6SiteLocal | Gets whether the address is an IPv6 site local address. |
![]() | IsIPv6Teredo | Gets whether the address is an IPv6 Teredo address. |
![]() | ScopeId | Gets or sets the IPv6 address scope identifier. |
| Name | Description | |
|---|---|---|
![]() | Equals | Compares two IP addresses. (Overrides Object.Equals(Object).) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetAddressBytes | Provides a copy of the IPAddress as an array of bytes. |
![]() | GetHashCode | Returns a hash value for an IP address. (Overrides Object.GetHashCode().) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() ![]() | HostToNetworkOrder(Int16) | Converts a short value from host byte order to network byte order. |
![]() ![]() | HostToNetworkOrder(Int32) | Converts an integer value from host byte order to network byte order. |
![]() ![]() | HostToNetworkOrder(Int64) | Converts a long value from host byte order to network byte order. |
![]() ![]() | IsLoopback | Indicates whether the specified IP address is the loopback address. |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() ![]() | NetworkToHostOrder(Int16) | Converts a short value from network byte order to host byte order. |
![]() ![]() | NetworkToHostOrder(Int32) | Converts an integer value from network byte order to host byte order. |
![]() ![]() | NetworkToHostOrder(Int64) | Converts a long value from network byte order to host byte order. |
![]() ![]() | Parse | Converts an IP address string to an IPAddress instance. |
![]() | ToString | Converts an Internet address to its standard notation. (Overrides Object.ToString().) |
![]() ![]() | TryParse | Determines whether a string is a valid IP address. |
| Name | Description | |
|---|---|---|
![]() ![]() | Any | Provides an IP address that indicates that the server must listen for client activity on all network interfaces. This field is read-only. |
![]() ![]() | Broadcast | Provides the IP broadcast address. This field is read-only. |
![]() ![]() | IPv6Any | The Socket.Bind method uses the IPv6Any field to indicate that a Socket must listen for client activity on all network interfaces. |
![]() ![]() | IPv6Loopback | Provides the IP loopback address. This property is read-only. |
![]() ![]() | IPv6None | Provides an IP address that indicates that no network interface should be used. This property is read-only. |
![]() ![]() | Loopback | Provides the IP loopback address. This field is read-only. |
![]() ![]() | None | Provides an IP address that indicates that no network interface should be used. This field is read-only. |
The following code example shows how to query a server to obtain the family addresses and the IP addresses it supports.
// 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.GetHostEntry(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(); } } }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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