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IPHostEntry.HostName Property

Gets or sets the DNS name of the host.

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

'Declaration
Public Property HostName As String
'Usage
Dim instance As IPHostEntry
Dim value As String

value = instance.HostName

instance.HostName = value
/** @property */
public String get_HostName ()

/** @property */
public void set_HostName (String value)

public function get HostName () : String

public function set HostName (value : String)

Not applicable.

Property Value

A string that contains the primary host name for the server.

The HostName property contains the primary host name for a server. If the DNS entry for the server defines additional aliases, they will be available in the Aliases property.

The following example uses the HostName property to retrieve the primary host name.

Public Sub GetIpAddressList(hostString As [String])
    Try
        ' Get 'IPHostEntry' object which contains information like host name, IP addresses, aliases
    ' for specified url
        Dim hostInfo As IPHostEntry = Dns.GetHostByName(hostString)
        Console.WriteLine(("Host name : " + hostInfo.HostName))
        Console.WriteLine("IP address List : ")
        Dim index As Integer
        For index = 0 To hostInfo.AddressList.Length - 1
            Console.WriteLine(hostInfo.AddressList(index))
        Next index
    Catch e As SocketException
        Console.WriteLine("SocketException 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 'GetIpAddressList

    public void GetIpAddressList(String hostString)
    {
        try {
            // Get 'IPHostEntry' object containing information like host name,
            //IP addresses, aliases for a host.
            IPHostEntry hostInfo = Dns.GetHostByName(hostString);

            Console.WriteLine("Host name : " + hostInfo.get_HostName());
            Console.WriteLine("IP address List : ");
            for (int index = 0; index < hostInfo.get_AddressList().
                length; index++) {
                Console.WriteLine(hostInfo.get_AddressList().get_Item(index));
            }
        }
        catch (SocketException e) {
            Console.WriteLine("SocketException caught!!!");
            Console.WriteLine("Source : " + e.get_Source());
            Console.WriteLine("Message : " + e.get_Message());
        }
        catch (ArgumentNullException e) {
            Console.WriteLine("ArgumentNullException caught!!!");
            Console.WriteLine("Source : " + e.get_Source());
            Console.WriteLine("Message : " + e.get_Message());
        }
        catch (System.Exception e) {
            Console.WriteLine("Exception caught!!!");
            Console.WriteLine("Source : " + e.get_Source());
            Console.WriteLine("Message : " + e.get_Message());
        }
    } //GetIpAddressList
} //HostInfoSample

Windows 98, Windows Server 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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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