Regarding telnet

[praveenkumar palla]

how to connect to telnet and execute the commands using c#.net Please help me on this Praveenkumar Palla

[Ermak86]

use TcpClient class. to connect use its constructor TcpClient(String hostname, int Port) to write a command: byte[] buf = System.Text.ASCIIEncoding.ASCII.GetBytes(command.Replace("\0xFF","\0xFF\0xFF")); TcpClient.GetStream().Write(buf, 0, buf.Length); to read: byte[] bytes = new byte[tcpClient.ReceiveBufferSize]; TcpClient.GetStream().Read(bytes, 0, (int)tcpClient.ReceiveBufferSize); String s = Encoding.ASCII.GetString(bytes); Choose encoding which you need in read and write instead of TcpClient use your TcpClient instance name Pawel

[praveenkumar palla]

Thanks for the reply Pawel But One issue, First I connected to remote system(using IP,port) using TcpClient constructor. then I red command (why because when I connected to that system it is prompting for the login and then password) It returns the string "??
??????\0??\0Microsoft (R) Windows (TM) Version 5.00 (Build 2195)\r\nWelcome to Microsoft Telnet Service \r\nTelnet Server Build 5.00.99206.1\n\rlogin: \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0" then I wrote a command string command="administrator";////////"administrator" that system login name byte[] buf = System.Text.ASCIIEncoding.ASCII.GetBytes(command.Replace("\0xFF","\0xFF\0xFF")); TcpClient.GetStream().Write(buf, 0, buf.Length); Again I red command(actually it should return "Password:" ) but it returns "administrator?\0Microsoft (R) Windows (TM) Version 5.00 (Build 2195)\r\nWelcome to Microsoft Telnet Service \r\nTelnet Server Build 5.00.99206.1\n\rlogin: \0\0\0\0\0\0\0\0\0\0\0\0\0\0\" So not connected.....Please help me on this Actually my application needs backend execution of commands at cmd.exe of remote systems (using IP) and should return command result. Please help me on this