POS Printer Device Enabled - POSControlException Thrown


  • I'm attempting to print to an NCR 7197 receipt printer using the Microsoft.PointOfService dll that's part of Microsoft POS for .NET SDK.

    Here are some of the resources I've examined:




    The simplified C# 2008 code I'm working with is the following:

    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;
    using Microsoft.PointOfService;
    namespace MyOPOSPrinterTest
      public partial class frmPOSTest : Form
        PosExplorer posExplorer = new PosExplorer();
        string strLogicalName = "MyTestPrinter";
        public frmPOSTest()
        private void Form1_Load(object sender, EventArgs e)
          DeviceInfo oDevicePrinter = posExplorer.GetDevice("PosPrinter", strLogicalName);
          PosPrinter oPrinter = (PosPrinter)posExplorer.CreateInstance(oDevicePrinter);
            if (oPrinter != null)
              oPrinter.DeviceEnabled = true;
          catch (Exception exPrinter)
            MessageBox.Show(exPrinter.ToString(), "Warning");

    I get a POSControlException on the following line:

    oPrinter.DeviceEnabled = true;

    Additional details on the exception:

    "Microsoft.PointOfService.PosControlException: Failed to set property DeviceEnabled

    at Microsoft.PointOfService.Legacy.LegacyProxy.SetProperty(String propertyName, Object propertyValue)

    at Microsoft.PointOfService.Legacy.LegacyProxy.set_DeviceEnabled(Boolean value)

    at Microsoft.PointOfService.Legacy.LegacyPosPrinter.set_DeviceEnabled(Boolean value)

    at MyOPOSPrinterTest.frmPOSTest.Form1_Load(Object sender, EventArgs e) ...

    ErrorCode: Failure

    ErrorCodeExtended: 0

    End of Additional Details

    I'd appreciate some suggestions on what I might be missing.



    Friday, September 10, 2010 5:16 PM

All replies

  • I've also done quite a bit of searching on the MSDN Forums.
    Friday, September 10, 2010 5:33 PM