TcpClient和TcpListen

 

private void btn_send_Click(object sender, EventArgs e)
        {
            byte[] bt = System.Text.Encoding.Default.GetBytes(this.txt_msg.Text);
            TcpClient tc = new TcpClient(this.txt_tarip.Text, int.Parse(this.txt_tarport.Text));
            NetworkStream nks = tc.GetStream();
            nks.Write(bt, 0, bt.Length);
            nks.Flush();
        }

        private void btn_begin_Click(object sender, EventArgs e)
        {
            Thread t = new Thread(Listen);
            t.Start();
        }

        private void Listen()
        {
            TcpListener tl = new TcpListener(ep);
            tl.Start();
            while (true)
            {
                try
                {
                    Socket s = tl.AcceptSocket();
                    byte[] bt = new byte[256];
                    int i = s.Receive(bt);
                    string msg = System.Text.Encoding.Default.GetString(bt, 0, i);
                    if (msg.Length != 0)
                    {
                        this.txt_accmsg.AppendText(msg + "\r\n");
                    }
                }
                catch 
                { }
            }
        }