How to get the domain name and username of the client machine to save it to DB?

[Aman Aman]

how can I get the domain name and username of the client machine to save it to DB in my intranet application.

I have used
System.Environm ent.UserDomainN ame.ToString() System.Environm ent.UserName.To String()
Request.UserHos tName System.Net.Dns. GetHostEntry(Re quest.UserHostN ame).HostName System.Security .Principal.Wind owsIdentity.Get Current().Name;

none of them gives me the logged in user and domain in the client machine.

I am using windows authentication.

thanks