How to get the computer name using the IP Address

问题:

I am trying to get the computer name for the current user. I am able to get the IP address using System.Net.Dns.GetHostEntry("ComputerName").Address.ToString() but when I replace the *ComputerName*with the IPAddress I receive the following error.

No such host is known

I enabled reverse DNS in IIS7 by running command: Cscript.exe adsutil.vbs set w3svc/EnableReverseDNS TRUE in the C:\inetpub\AdminScripts directory on my server.

Any ideas on what I'm doing wrong?

Update

The overall purpose is that this will be a help desk application and it will be useful for a user to be able to easily provide their computer name for assistance.

Locally everything works but it does not work once published to the server.

回答1:

Here is how to obtain it on a different machine. This will also give you the IPv4 version.

class getIP
{
    public getIP()
    {

        IPAddress ip = Dns.GetHostEntry("whybla01").AddressList.Where(o => o.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork).First();
        Console.WriteLine(ip);
        string name = Dns.GetHostEntry(ip).HostName.ToString();
        Console.WriteLine(name);
    }
}

回答2:

You can try this :

  string machineName = GetMachineNameFromIPAddress(yourIPAdress);

  private static string GetMachineNameFromIPAddress(string ipAdress)
        {
            string machineName = string.Empty;
            try
            {
                IPHostEntry hostEntry = Dns.GetHostEntry(ipAdress);

                machineName = hostEntry.HostName;
            }
            catch (Exception ex)
            {
                // Machine not found...
            }
            return machineName;
        }

回答3:

Thanks to all that answered this post.

Actually, the code was not the problem. There was nothing wrong with the code that I was trying or the suggestions made. I found out that the server DNS entry was not set up correctly.

Maybe this will help someone else.