Dns.GetHostByAddress Method (IPAddress)

Note: This API is now obsolete.

Creates an IPHostEntry instance from the specified IPAddress.

Namespace:  System.Net
Assembly:  System (in System.dll)

[ObsoleteAttribute("GetHostByAddress is obsoleted for this type, please use GetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public static IPHostEntry GetHostByAddress(
	IPAddress address
)

Parameters

address
Type: System.Net.IPAddress

An IPAddress.

Return Value

Type: System.Net.IPHostEntry
An IPHostEntry.
An IPHostEntry instance.

ExceptionCondition
ArgumentNullException

address is null.

SocketException

An error is encountered when resolving address.

NoteNote

This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing in the .NET Framework.

The following example creates a IPHostEntry from an IPAddress.

      try 
      {
         IPAddress hostIPAddress = IPAddress.Parse(IpAddressString);
         IPHostEntry hostInfo = Dns.GetHostByAddress(hostIPAddress);
         // Get the IP address list that resolves to the host names contained in  
         // the Alias property.
         IPAddress[] address = hostInfo.AddressList;
         // Get the alias names of the addresses in the IP address list.
         String[] alias = hostInfo.Aliases;

         Console.WriteLine("Host name : " + hostInfo.HostName);
         Console.WriteLine("\nAliases :");
         for(int index=0; index < alias.Length; index++) {
           Console.WriteLine(alias[index]);
         } 
         Console.WriteLine("\nIP address list : ");
         for(int index=0; index < address.Length; index++) {
            Console.WriteLine(address[index]);
         }
      }
      catch(SocketException e) 
      {
	 Console.WriteLine("SocketException caught!!!");
         Console.WriteLine("Source : " + e.Source);
         Console.WriteLine("Message : " + e.Message);
      }
      catch(FormatException e)
      {
	 Console.WriteLine("FormatException caught!!!");
         Console.WriteLine("Source : " + e.Source);
         Console.WriteLine("Message : " + e.Message);
      }
      catch(ArgumentNullException e)
      {
	 Console.WriteLine("ArgumentNullException caught!!!");
         Console.WriteLine("Source : " + e.Source);
         Console.WriteLine("Message : " + e.Message);
      }
	  catch(Exception e)
	  {
		  Console.WriteLine("Exception caught!!!");
		  Console.WriteLine("Source : " + e.Source);
		  Console.WriteLine("Message : " + e.Message);
	  }

.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4.6
Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

.NET Framework Client Profile

Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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