Unable to get "user computer name"

as mentioned above after doing lot of try & error I still stuck at this, all the reference I found till now still unable to solve this issue as I can't get the real computer name at all, instead most of example I tried before will return server name or the closest one will return "10" no matter how many user it captured. I'm making a log function for my system, so far I can get domain name, user ip address, user id like in my code below :

Please somebody guide me on how to get "User Computer Name"...TQ Everyone

using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Mail;
using System.IO;
using System.Globalization;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using Microsoft.SharePoint;

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    {
        SPSite spSite = SPContext.Current.Site;
        SPSite spConvSite = new SPSite("www.mywebsite.com");
        SPWeb spWeb = SPContext.Current.Web;
        SPWeb spConvWeb = spConvSite.OpenWeb();
        SPUser spUser = spWeb.CurrentUser;

        string strDateLogCreated = DateTime.Now.ToString("ddMMyyyy-hhmmsstt", CultureInfo.InvariantCulture);
        string LogFolder = "D:\\Logs\\Client";
        string[] LocalComputerName = System.Net.Dns.GetHostEntry(Request.ServerVariables["remote_addr"]).HostName.Split(new Char[] { '.' });
        String ecn = System.Environment.MachineName;
        string domainName = System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties().DomainName;
        string hostName = Dns.GetHostName();
        IPGlobalProperties  ipProperties = IPGlobalProperties.GetIPGlobalProperties();
        string testHost = ipProperties.HostName;
        string testDomain = ipProperties.DomainName;
        string strLocalIPAddress = HttpContext.Current.Request.UserHostAddress.ToString();

        string hName = "";      
        System.Net.IPHostEntry host = new System.Net.IPHostEntry();
        host = System.Net.Dns.GetHostEntry(HttpContext.Current.Request.ServerVariables["REMOTE_HOST"]);

        //Split out the host name from the FQDN
        if (host.HostName.Contains("."))
        {
        string[] sSplit = host.HostName.Split('.');
        hName = sSplit[0].ToString();
        }
        else
        {
        hName = host.HostName.ToString();
        }
        //return hName;


        StreamWriter swLogFile = File.AppendText(String.Format(@"{0}\Client-{1}.log", LogFolder, strDateLogCreated));

        swLogFile.WriteLine("*** Date & Time : " + DateTime.Now.ToString("dd/MM/yyyy hh:mm:ss tt", CultureInfo.InvariantCulture));
        swLogFile.WriteLine("*** Initiated By : " + spUser.Name.ToString());
        swLogFile.WriteLine("*** LAN ID : " + spUser.LoginName.ToString());
        swLogFile.WriteLine("*** Computer Name : " + LocalComputerName[0].ToString());
        swLogFile.WriteLine("*** IP Address : " + strLocalIPAddress.ToString());
        swLogFile.WriteLine("---------------------------------------------------");
        swLogFile.WriteLine(DateTime.Now.ToString("hh:mm:ss tt", CultureInfo.InvariantCulture) + " - " + "Successfully captured.");
        swLogFile.WriteLine("=====================================================================================================");
        swLogFile.WriteLine("Test 1 : " + domainName.ToString());
        swLogFile.WriteLine("Test 2 : " + hostName.ToString());
        swLogFile.WriteLine("Test 3 : " + testHost.ToString());
        swLogFile.WriteLine("Test 4 : " + System.Environment.GetEnvironmentVariable("COMPUTERNAME"));
        swLogFile.WriteLine("Test 5 : " + System.Net.Dns.GetHostEntry(Request.ServerVariables["REMOTE_HOST"]).HostName);
        swLogFile.WriteLine("Test 6 : " + hName.ToString());
        swLogFile.Flush();
    }

Example of the output like this :

Date & Time : 18/02/2013 11:45:26 AM

Initiated By : USER NAME

LAN ID : DOMAIN\ID99999

Computer Name : 10 //I don't get the real user computer name here!

IP Address : 99.999.99.999

//-----------------------------------//

11:45:26 AM - Successfully captured.

//===================================//

Test 1 : DOMAIN.COMPANYDOMAIN.com

Test 2 : SERVERNAME

Test 3 : SERVERNAME

Test 4 : SERVERNAME

Test 5 : 99.999.99.999

Test 6 : 10 //Also return the same result

UPDATE :

I manage to get the answer now, the answer link to my answer on another post here :

https://stackoverflow.com/a/38953637/1785641

An updated version from Kelsey post on the link above :

$(function GetInfo() {
    var network = new ActiveXObject('WScript.Network');
        alert('User ID : ' + network.UserName + '\nComputer Name : ' + network.ComputerName + '\nDomain Name : ' + network.UserDomain);
        document.getElementById('<%= currUserID.ClientID %>').value = network.UserName;
        document.getElementById('<%= currMachineName.ClientID %>').value = network.ComputerName;
        document.getElementById('<%= currMachineDOmain.ClientID %>').value = network.UserDomain;
});

To store the value, add these control :

<asp:HiddenField ID="currUserID" runat="server" /> <asp:HiddenField ID="currMachineName" runat="server" /> <asp:HiddenField ID="currMachineDOmain" runat="server" />

Where you also can calling it from behind like this :

Page.ClientScript.RegisterStartupScript(this.GetType(), "MachineInfo", "GetInfo();", true);

Well, you're setting LocalComputerName to

System.Net.Dns.GetHostEntry(
Request.ServerVariables["remote_addr"]).HostName.Split(new Char[] { '.' })

What happens if you change that to:

System.Net.Dns.GetHostEntry(Request.ServerVariables["remote_addr"])

If you end up with an IP address, try using nslookup on that and seeing if you get a hostname. If you don't, your problem is in DNS resolution.

By the way, does the actual IP address start with 10. ?