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IPHostEntry.HostName Property

Gets or sets the DNS name of the host.

[Visual Basic]
Public Property HostName As String
[C#]
public string HostName {get; set;}
[C++]
public: __property String* get_HostName();
public: __property void set_HostName(String*);
[JScript]
public function get HostName() : String;
public function set HostName(String);

Property Value

A string containing the primary host name for the server.

Remarks

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.

Example

[Visual Basic, C#, C++] The following example uses the HostName property to retrieve the primary host name.

[Visual Basic] 
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

[C#] 

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.HostName);
        Console.WriteLine("IP address List : ");
        for(int index=0; index < hostInfo.AddressList.Length; index++)
        {
            Console.WriteLine(hostInfo.AddressList[index]);
        }
    }
    catch(SocketException e) 
    {
        Console.WriteLine("SocketException 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);
    }
}

[C++] 
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);
   }
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard

See Also

IPHostEntry Class | IPHostEntry Members | System.Net Namespace

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