Zebra printer KR403 port number

Question

I try to print to zebra printer. Zebra provided me a standard code sample in C# There they used port 9100 to connect to the printer

    System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();

    client.Connect("127.0.0.1", 9100);

However each time i run this code it crashes as there is no such port number available I also used telnet 127.0.01 9100 and that confirmed that there is nothing listening to 9100 I also tried port 6101 as used by some Zebra printers no success either.

I can run in a dos command

    print /D:\\127.0.0.1\KR403 d:\print.txt

This does print, and proves it listens somehow to network Internally. This device is a USB printer, and that's making it complex to set a static port ID. Perhaps also strange the above command does print a barcode, but doesnt cut the paper; when i print using notepad (which i assume does not use the network to print) then it cuts paper but the paper is 40cm long (way to large).. so i am in driver battle it seams.

What i hope to do, is send a print command using C# and use ZPL commands to print Microsoft wrote an article about raw printing too, but it fails on this printer.

All i want to do is send ZPL instructions to this printer. Aslo tried generic txt driver, this works for notepad but not for C#

Code used :

   using System;
   using System.Collections.Generic;
   using System.ComponentModel;
   using System.Data;
   using System.Drawing;
   using System.Linq;
   using System.Text;
   using System.Windows.Forms;

   // print /D:\\127.0.0.1\KR403 d:\print.txt


  namespace PrinterTest
  {
  public partial class Form1 : Form
  {
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        // Printer IP Address and communication port
        string ipAddress = @"192.168.2.109";
        int port = 6101; // 9100;//

        // ZPL Command(s)
        string ZPLString =
            "^XA" +
            "^FO50,50" +
            "^A0N50,50" +
            "^FDHello, World!^FS" +
            "^XZ";

        try
        {
            // Open connection
            System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
            //client.Connect(ipAddress, port);
           client.Connect(ipAddress, port);
           // string tmp = "\\127.0.0.1\KR403";
           // client.Connect(@"\\localhost",9100);



            // Write ZPL String to connection
            System.IO.StreamWriter writer = new System.IO.StreamWriter(client.GetStream());
            writer.Write(ZPLString);
            writer.Flush();

            // Close Connection
            writer.Close();
            client.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error");
        }
    }

  }
  }

is the printer installed on your machine? Printer settings should show the port it's connected with in your control panel. — Brad Christie
Yes it is, but where it normally would read a port nummber, i see USB0001 not something i can use. — user613326

Ovi Tisler Ovi Tisler · Accepted Answer · 2013-02-28T18:42:29

You can't use a TcpClient to connect to a locally attached device like USB. TcpClient is for network devices. If you put your printer on your network, then you can use TcpClient.

Zebra printer KR403 port number

4 Answers