Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
GetHostByAddress Method (IPAddress)
Collapse the table of content
Expand the table of content

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)

'Declaration
<ObsoleteAttribute("GetHostByAddress is obsoleted for this type, please use GetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")> _
Public Shared Function GetHostByAddress ( _
	address As IPAddress _
) As IPHostEntry

Parameters

address
Type: System.Net.IPAddress

An IPAddress.

Return Value

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

ExceptionCondition
ArgumentNullException

address is Nothing.

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.

Public Sub DisplayHostAddress(IpAddressString As [String])
    Try 
        Dim hostIPAddress As IPAddress = IPAddress.Parse(IpAddressString)

        ' Call the GetHostByAddress(IPAddress) method, passing an IPAddress object as an argument  
        ' to obtain an IPHostEntry instance, containing address information for the specified host. 

        Dim hostInfo As IPHostEntry = Dns.GetHostByAddress(hostIPAddress)
        ' Get the IP address list that resolves to the host names contained in  
        ' the Alias property. 
        Dim address As IPAddress() = hostInfo.AddressList
        ' Get the alias names of the above addresses in the IP address list. 
        Dim [alias] As [String]() = hostInfo.Aliases

        Console.WriteLine(("Host name : " + hostInfo.HostName))
        Console.WriteLine(ControlChars.Cr + "Aliases :")
        Dim index As Integer 
        For index = 0 To [alias].Length - 1
            Console.WriteLine([alias](index))
        Next index
        Console.WriteLine(ControlChars.Cr + "IP address list : ")

        For index = 0 To address.Length - 1
            Console.WriteLine(address(index))
        Next index

    Catch e As SocketException
        Console.WriteLine("SocketException caught!!!")
        Console.WriteLine(("Source : " + e.Source))
        Console.WriteLine(("Message : " + e.Message))

    Catch e As FormatException
        Console.WriteLine("FormatException caught!!!")
        Console.WriteLine(("Source : " + e.Source))
        Console.WriteLine(("Message : " + e.Message))

    Catch e As ArgumentNullException
        Console.WriteLine("ArgumentNullException caught!!!")
        Console.WriteLine(("Source : " + e.Source))
        Console.WriteLine(("Message : " + e.Message))

    Catch e As Exception
        Console.WriteLine("Exception caught!!!")
        Console.WriteLine(("Source : " + e.Source))
        Console.WriteLine(("Message : " + e.Message))
    End Try 
End Sub 'DisplayHostAddress

.NET Framework

Supported in: 1.1
Obsolete (compiler warning) in 4.6
Obsolete (compiler warning) in 4.6
Obsolete (compiler warning) in 4.5
Obsolete (compiler warning) in 4.5.1
Obsolete (compiler warning) in 4.5.2
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

Show:
© 2015 Microsoft