TcpClient tc = new TcpClient();
                 IPAddress ip = IPAddress.Parse(192.168.1.1);
                 int notePort = int.Parse(9100);
                 tc.Connect(ip, notePort);
                 NetworkStream stream = tc.GetStream();
                 string a = "BF ON:PP 125,40:BT \"CODE39\":PB \"232323232\":PF";
                 Byte[] data = Encoding.ASCII.GetBytes(a);
                 stream.Write(data, data.Length, 0);
                 stream.Close();
                 tc.Close();
                 MessageBox.Show("已发送");
                 txtData.SelectAll();
                 txtData.Focus(); 程序能通过,但是发送出去的指令,条码打印机没反应,只是闪了一下灯,是不是我发送的指令错了还是应该用那种方式发送。在此谢过了