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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 Value

Type: System.String
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
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(S"Host name : {0}", hostInfo->HostName);
      Console::WriteLine(S"IP address List : ");
      for (int index = 0 ; index < hostInfo->AddressList->Length ; index++)
         Console::WriteLine(hostInfo->AddressList->Item[index]);

   } catch (SocketException* e) {
      Console::WriteLine(S"SocketException caught!!!");
      Console::WriteLine(S"Source : {0}", e->Source);
      Console::WriteLine(S"Message : {0}", e->Message);
   } catch (ArgumentNullException* e) {
      Console::WriteLine(S"ArgumentNullException caught!!!");
      Console::WriteLine(S"Source : {0}", e->Source);
      Console::WriteLine(S"Message : {0}", e->Message);
   } catch (Exception* e) {
      Console::WriteLine(S"Exception caught!!!");
      Console::WriteLine(S"Source : {0}", e->Source);
      Console::WriteLine(S"Message : {0}", e->Message);
   }
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
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