get ip address and pc name of client

You can get the Client IP address: Request.UserHostAddress will give it to you.

However, they is probably not the actual IP address of the client PC, and you can't get that or the PC name. The IP you get will be the IP of the ADSL connection device that transports between the internet (via the ISP) and the local PC on any internal network. The internal address is meaningless without access to the entire internal network, which you won't have, since it will probably be randomly assigned in the 192.x.x.x range.

Basically, you can't get what you want. The PC name is unavailable for security reasons, and the IP is unavailable because you have no access beyond the ADSL router to the local internal network.

Did you try [REMOTE_ADDR] exactly? Or did you try

Request.ServerVariables("remote_host")

http://www.w3schools.com/asp/coll_servervariables.asp[^]

i have tried
string PCName = Dns.GetHostEntry(Request.ServerVariables["REMOTE_ADDR"]).HostName;
and

With system.Net.DNS.GetHostByName(system.Net.DNS.GetHostName())
    sam = New System.Net.IPAddress(.AddressList(0).Address)
    sam1 = sam.ToString
End With

but it gives me server address

by request.userhostaddress i am getting 127.0.0.1