POS for .NET Forum

Invalid Parameter: Name handle Exception

Mon, 23 Nov 2009 12:21:37 Z

I am using VB.Net code to print barcode label in Zebra TLP 2844 printer. And the printer is connected to system by USB port. When i execute the code i get an error "Invalid Parameter : Name handle" in the line outFile = New FileStream(_SafeFileHandle, FileAccess.Write) . Can you please help me to rectify this.
As this is a USB port So i shared the printer and used the UNC path. But still i get the error. Below is the complete code

Name Spaces
Imports System.IO
Imports System.Runtime.InteropServices

Here is the button click code

Dim _print as new ZebraPrint
_print.StartWrite("//ComputerName/PrinterSharedName")
dim _Text as String = "Print test"
_print.Write("A30,120,0,4,2,1,N,""" & _Text & """")
_print.EndWrite()

Class

Public Class ZebraPrint
#Region " Private constants "
Private Const GENERIC_WRITE As Integer = &H40000000
Private Const OPEN_EXISTING As Integer = 3
#End Region

#Region " Private members "
Private _SafeFileHandle As Microsoft.Win32.SafeHandles.SafeFileHandle
Private _fileWriter As StreamWriter
Private _outFile As FileStream

#End Region

#Region " private structures "
<StructLayout(LayoutKind.Sequential)> _
Public Structure SECURITY_ATTRIBUTES
Private nLength As Integer
Private lpSecurityDescriptor As Integer
Private bInheritHandle As Integer
End Structure

#End Region

#Region " com calls "
Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Integer, ByVal dwShareMode As Integer, <MarshalAs(UnmanagedType.Struct)> ByRef lpSecurityAttributes As SECURITY_ATTRIBUTES, ByVal dwCreationDisposition As Integer, ByVal dwFlagsAndAttributes As Integer, ByVal hTemplateFile As Integer) As Microsoft.Win32.SafeHandles.SafeFileHandle

#End Region
#Region " Public methods "
Public Sub StartWrite(ByVal printerPath As String)
Dim SA As SECURITY_ATTRIBUTES

_SafeFileHandle = CreateFile(printerPath, GENERIC_WRITE, 0, SA, OPEN_EXISTING, 0, 0)

Try

_outFile = New FileStream(_SafeFileHandle, FileAccess.Write)

_fileWriter = New StreamWriter(_outFile)

Catch ex As Exception

System.Windows.Forms.MessageBox.Show("Can not find printer.", "Warning", Windows.Forms.MessageBoxButtons.OK, Windows.Forms.MessageBoxIcon.Error, Windows.Forms.MessageBoxDefaultButton.Button1)

End Try

End Sub

Public Sub Write(ByVal rawLine As String)

If _fileWriter IsNot Nothing Then

_fileWriter.WriteLine(rawLine)

End If

End Sub

Public Sub EndWrite()

If _fileWriter IsNot Nothing Then

_fileWriter.Flush()

_fileWriter.Close()

_outFile.Close()

End If

_SafeFileHandle.Close()

_SafeFileHandle.Dispose()

End Sub

#End Region

End Class

Point Of Sales: I want create an Application in Point Of Sale in VB.net/C#.net

Tue, 24 Nov 2009 09:17:41 Z

Hi one and all...

I want to create an POS Application in Retail and restaurant management in C#.Net/VB.net. So anyone can post me links regarding POS learning guide (either in pdf/doc document) using C#.net/Vb.net which should be very easy to learn step-by-step.

if u found any application regarding POS learning guide document please attatch the link for download.

Using The POSPrinter Simulator

Tue, 17 Nov 2009 00:38:43 Z

Hello All.

I have been writing a small application which uses a POS printer and everything is working OK. But now I have lost the use of the physical printer and want to use the device simulator in the POS .NET SDK to test my app with. But how do I use it ? How do I set up a virtual POS printer and where do I view the output after sending something to it ? Any help is appreciated.

Thanks

Andrew.

Honeywell POS .NET scanner issues

Fri, 20 Nov 2009 22:54:33 Z

I have started this thread for known issues with the Honeywell imagers using POS for .NET. If you encounter any others, please post them here.

I have found several bugs or problems in the Honeywell service object for imagers such as 4600g, 4600r, 4800, 4820. Maybe eventually HOneywell will fix them, but if they bother you consider buying another manufacturer's devices or contact Honeywell support and complain.

1. Service object not compatible with windows x64.
2. Service object does not utilize imager (camera) in the scanner
3. There is a bug reading 1 or 2 character barcodes.
4. There is a possible bug reading PDF417 barcodes.

C# - POS for .NET - VS2008 - Windows 7 x64

Fri, 20 Nov 2009 16:41:44 Z

Hi all,

I will pose a little problem with that took several days to see if anyone on the forum can give me some solution / explanation of it.

First put them in history, I'm working on a project which is developing technology that can see in the title of this topic, development with Visual Studio 2008 in C # (Framework 3.5), use of POS for. NET to interact with peripherals OPOS and all this on Windows 7 x64.

The program is compiled for x86 and syncs seamlessly to your peripherals, in particular with a printer ( "POSPrinter") Epson and a barcode reader ( "Scanner") Metrologic, both connected via COM ports.

So far everything is correct, well connected, I can access the properties of the devices, can implement the methods of your classes, ... BUT (and as always there must be a but), I can not detect the event none of the devices (or DataEvent or ErrorEvent, or any other event of the peripherals).

However, I have compiled the program for x86 and Framework 2.0, I run on Windows XP and everything works perfectly (including events).

I've also tried without using POS for. NET directly using the dll's that contain device drivers and nothing good properties, functions well, but events there is no way that they work. That yes, this happens to me exclusively when I run the program through a. NET Framework, but if I use other technologies that use the same libraries (same Service Object, same ControlObject), the events work perfectly, as in Windows XP.

If anyone has any idea why this may be happening, I will be very grateful.

Greetings and thank you

Translate by Google, you sorry me for the translate errors.

is this a bug for POS for .NET?

Thu, 19 Nov 2009 04:10:31 Z

Is this a bug of POS for .NET library?

When starting our program which refer Microsoft.PointOfService, claim device, then this event logs keep increasing in windows event viewer.

Event 1. Recreating statistics Xml file.

Event 2. An Xml exception occurred while attempting to load the statistics xml file.

System.Xml.XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 16, position 50.

at System.Xml.XmlTextReaderImpl.Throw(Exception e)

at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)

at System.Xml.XmlTextReaderImpl.Throw(Int32 pos, String res, String[] args)

at System.Xml.XmlTextReaderImpl.ThrowInvalidChar(Int32 pos, Char invChar)

at System.Xml.XmlTextReaderImpl.ParseNumericCharRefInline(Int32 startPos, Boolean expand, BufferBuilder internalSubsetBuilder, Int32& charCount, EntityType& entityType)

at System.Xml.XmlTextReaderImpl.ParseNumericCharRef(Boolean expand, BufferBuilder internalSubsetBuilder, EntityType& entityType)

at System.Xml.XmlTextReaderImpl.HandleEntityReference(Boolean isInAttributeValue, EntityExpandType expandType, Int32& charRefEndPos)

at System.Xml.XmlTextReaderImpl.ParseAttributeValueSlow(Int32 curPos, Char quoteChar, NodeData attr)

at System.Xml.XmlTextReaderImpl.ParseAttributes()

at System.Xml.XmlTextReaderImpl.ParseElement()

at System.Xml.XmlTextReaderImpl.ParseElementContent()

at System.Xml.XmlTextReaderImpl.Read()

at System.Xml.XsdValidatingReader.Read()

at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)

at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)

at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)

at System.Xml.XmlDocument.Load(XmlReader reader)

at Microsoft.PointOfService.BaseServiceObjects.DeviceStatistics.LoadAndValidateStatisticsXml(FileStream xmlStream)

.NET for POS Signature Capture Devices

Tue, 17 Nov 2009 19:34:11 Z

I am working on adding .NET for POS/OPOS/UPOS support to our application. I decided to start with SigCap and thus ordered a very popular SigCap device (Honeywell TT8500) which claimed to have UPOS driver support (which Honeywell claims not to support). I have now worked on this for weeks and have made progress but am now at the realization. The setup of this device's UPOS environment is like duck taping a wheel on a car. Now I've hit a wall in that the POS for .NET framework does not let me access any part of the sigcap device (use of any properties on the Device object throws an exception). I've tried the OPOS assemblies for .NET provided by Curtiss Monroe at http://monroecs.com/posfordotnet/opos_dotnet.htm. and they work but as soon as the "Done" button is pressed on the SigPad, the program simply disappears (no exception, no error, it just ends). The TT8500 is OBVIOUSLY not the defacto SigCap pad for POS for .NET and with Honeywell basically washing their hands of using anything but C++ or VB 6 to access it, I think of it as a dead end device.

My question is there a good list of signature pads which DO work well with POS for .NET and/or OPOS which are easy to setup, whose drivers don't misbehave and whose manufacturer doesn't treat me like a leper for using a modern programming environment?

Thanks, John Hamilton POSitive Software Company http://www.gopositive.com

RFID Device

Mon, 16 Nov 2009 09:26:33 Z

Can you tell us if a service object(SO) that is supplied from one vendor for a RFID scanner with PINPAD will work on any other RFID scanner with PINPAD.
In the bigger picture we are actually looking for a RFID PINPAD device with a generic Service object.

Also let us know how we could utilise the service objects provided with the SDK in our scenario of RFID PINPAD device.

If it works only with a specific RFID PINPAD device and not ANY RFID PINPAD device it will not help our project.
Thanks,

How to use a generic printer

Wed, 11 Nov 2009 16:09:48 Z

Hi everybody!
I'm using POS for .NET for printing on my epson TM-T88IV printer (on the serial port). I make a program in C# that realize what I want to print.

So.. if I want to print on a generic printer?

I explain: I would like that the program will able to "see" which printers is connected to the pc (serial port/usb), epson or not is not important! And then the user can choose which printer will use to print!

What I've to do for realize this?!

Thanks!!

Multiple device category

Mon, 16 Nov 2009 09:29:13 Z

I have a multiple device that means RFID,MSR and IC card reader in one unit. How many SO's do i need and how will they work?Also why is the hardware id not getting recognised when i invoke getdevices. What is required for the harware id to be recognised if i plug a multipe category device in the usb port.

Printing receipts using Epson LX-300 +

Sat, 14 Nov 2009 14:57:04 Z

Hi .NET superstars,

I'm absolutely new to .NET and world of printing. I basically need to printer some information in a receipt-like paper (almost half of the A4 size). Printer that I've is Epson LX-300 +. I've searched these forums & realized I need to download two things a)- Microsoft POS.NET b)-ESPON OPS ADK for .NET and I did download these two. So far so good.
So I've three questions

1- Has anyone programmed using Espon LX-300 +? How is the process like? I'm a junior programmer but what I can see from source code samples is that you basically send a plain text to printers? Furthermore, paper sized aren't specified in the source code, right? I mean how do we control paper-size in LX 300 + --from Printer Prefences?

2- I downloaded ESPON OPOS ADK.NET . After the download I can see application programming guides for all kinds of printers but I don't see a programming guide for LX 300 +. Can you please help me in locating the application programming guide for LX 300 +.

3- I attached the printer with PC and then opened up "SetupPOS" utility. In that utility, when I click on "Add Device" button it pops up a screen that contains various device names. However, among those device names I don't see "LX 300 +". Any ideas what should I do in this scenario?

I'm sorry if these sound like easy questions but I honestly have no clue. So I will really appreciate any help in this regard.

Thanks,
Rao

USB HID Msr ( POS for .NET )

Fri, 13 Nov 2009 07:11:12 Z

Hi, I have one USB HID Msr device.

When i plug this device to my machine by default HID drive get control of this device.
I want to implement the POS for .NET plug and play utility for this device.

I have put this XML at following path with name configuration.xml
Path :
C:\Program Files\Common Files\Microsoft Shared\Point Of Service\Control Configurations

XML:

<?xml version="1.0"?>
<PointOfServiceConfig Version="1.0">
    <ServiceObject Type="Msr" Name="eZeeMsr" Override="yes">
        <HardwareId From="USB\VID_0801&amp;PID_001"
        To="USB\VID_0801&amp;PID_001"/>
        <HardwareId From="USB\VID_0801&amp;PID_001&amp;REV_0100"
        To="USB\VID_0801&amp;PID_001&amp;REV_0100"/>
    </ServiceObject>
</PointOfServiceConfig>

VB.NET Code :

    WithEvents myExplorer As New PosExplorer
    WithEvents myMsr As Msr

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim div As DeviceCollection = myExplorer.GetDevices("Msr")
        For Each d As DeviceInfo In div
            MsgBox(d.ToString)
        Next
    End Sub

    Private Sub myExplorer_DeviceAddedEvent(ByVal sender As Object, ByVal e As Microsoft.PointOfService.DeviceChangedEventArgs) Handles myExplorer.DeviceAddedEvent
        If (e.Device.Type = DeviceType.Msr) Then
            myMsr = myExplorer.CreateInstance(e.Device)
            myMsr.Open()
            myMsr.Claim(1000)
            myMsr.DeviceEnabled = True
            myMsr.DataEventEnabled = True
            myMsr.DecodeData = True
        End If
    End Sub

Problem :
I have tried many times, not even my device coming into that form load list, or even when i plug again my device
Pos explorer Device add event not get called.

Things Rechecked :
XML is on valid path : true
XML is valid format : true
Hardware ID is correct : true ( verified from Windows Device Manager )

Can anybody suggest me any solution ? , or i have done any mistake in logic.

Any help will be greatly appreciated.

Thanks in advance.

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Thu, 09 Jul 2009 04:07:49 Z

I used pos.net for usb barcode scanner integration in windows apllication . I got the following error when i activate the device " Attempted to read or write protected memory. This is often an indication that other memory is corrupt ".

thanks for your solutions ..........

Scanner with imager support

Fri, 13 Nov 2009 06:10:48 Z

Are there yet any barcode scanners that support imager functions with POS for .NET?

Honeywell acquires HHP + Metrologic and lays an egg. I will give credit to HHP for trying to build a POS for .NET driver, but come on--can't you take it a bit further and integrate the imager functions. The possibilities for integration with a POS imager camera are amazing. Their UPOS java based driver is horrible.

Motorola buys Symbol and still sucks in my opinion.

Intermec --- nope

Need help with EPOS please

Tue, 10 Nov 2009 15:56:41 Z

Hi, I'm new to EPOS so i'm just wondering if it is the best solution to my problem. I'm developing a point of sale system in VS.NET using C#. The printers are not directly connected to the terminals, they are accessed via the network. Most of the printable info are generated by Crystal Reports,some are done in code. In the database I store the printer info for each terminal,ie the printer I should send this info to for printing. So when a printable info is generated I send it to the printer "assigned" to that terminal. I need to redirect the info to another printer in the event that this malfunctions(out of paper, off..etc). Can EPOS help me in this regard? If so how does it do it? I trust i explained my self certainly. I'd really appreciate any help on this. I was reading an answer from Yort that was helpful in understandin a few things about POS.

how to print a Bill info with header Logo and Store info.

Tue, 10 Nov 2009 06:07:53 Z

Hi All,

I want to print Bill receipt with Header logo and info along with Bill information.
POSPrinter.PrintMethod is printing line information, how would I print complete items and Logo in the Print.

Please post sample code.

Thanks in advance.

POS Printer example in C# 2005

Wed, 14 Oct 2009 09:00:25 Z

Hi All,

I am new to POS Devlopment. Plase help me in POS Printer.

I need an example, which will checks the Printer is connected. enabled and it should print sample. I am using EPSON (POS printer) TM -T881V.

Please send me C# sample applciation. Thanks in advance.

Evento del scroll en un treeview

Sat, 07 Nov 2009 18:23:59 Z

Hola!!.. alguien sabe cual es el evento que se ejecuta cuando el sroll de un tree view se mueve para arriba o para abajo?.. en vb.net

Printing on Ithaca Receipt printer

Wed, 04 Nov 2009 17:15:06 Z

Hi ,

I am using Ithaca Series 90 Plus Printer to print receipts and validate checks. I couldn't find any helpful info to start with. I am using SQl Server reports for both the receipts and check validations. It will helpful if any one here helps me out.

Thanks.

Sree

Implement Pole Display in DOS Mode in VB.NET

Fri, 09 Oct 2009 10:50:45 Z

Hi, I want to implement Pole Display in DOS Base through VB.NET. How can I align the text which is Display in the Pole Display and also clear the text when I want to clear it. I have required three type of Port(COM, LPT, USB) for Pole display.

NOTE: Don't use of OPOS driver.

Failed to open registry key HKEY_LOCAL_MACHINE\SOFTWARE\POSfor.NET\ControlAssemblies (with Windows7)

Mon, 02 Nov 2009 21:37:22 Z

We are receiving the following error when running POS for .NET 1.12 on Windows 7 x86 version. My guess is that it is a permissions related error caused by UAC in Windows7. The code worked fine under Windows XP. Does anyone have any idea about how to resolve this?

An exception of type 'System.TypeInitializationException' occurred and was caught.

----------------------------------------------------------------------------------

11/02/2009 13:32:33

Type : System.TypeInitializationException

Message : The type initializer for 'Microsoft.PointOfService.Management.Explorer' threw an exception.

Source : Microsoft.PointOfService

Help link :

TypeName : Microsoft.PointOfService.Management.Explorer

Data : System.Collections.ListDictionaryInternal

TargetSite : Microsoft.PointOfService.Management.Explorer CreateExplorer()

Stack Trace : at Microsoft.PointOfService.Management.Explorer.CreateExplorer()

at Microsoft.PointOfService.PosExplorer.LoadExplorer()

at Microsoft.PointOfService.PosExplorer.Initialize()

at Microsoft.PointOfService.PosExplorer..ctor(ISynchronizeInvoke synchronizingObject)

at Maddog.WePOSDevices.CardReader..ctor(ISynchronizeInvoke sinvoke)

at Maddog.Client.Contact.CustomerQuickAdd.CustomerQuickAdd_Load(Object sender, EventArgs e)

Additional Info:

MachineName : PC4116
TimeStamp : 11/2/2009 7:32:33 PM
FullName : Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null
AppDomainName : Maddog.Client.exe
ThreadIdentity :
WindowsIdentity :
Inner Exception

---------------

Type : Microsoft.PointOfService.PosLibraryException

Message : Failed to open registry key HKEY_LOCAL_MACHINE\SOFTWARE\POSfor.NET\ControlAssemblies.

Source : Microsoft.PointOfService

Help link :

Data : System.Collections.ListDictionaryInternal

TargetSite : Microsoft.PointOfService.Management.ServiceObjectCollection Scan()

Stack Trace : at Microsoft.PointOfService.Management.AssemblyLoader.Scan()

at Microsoft.PointOfService.Management.AssemblyLoader.Scan()

at Microsoft.PointOfService.Management.Explorer.ScanForSOAssemblies()

at Microsoft.PointOfService.Management.Explorer.Refresh()

at Microsoft.PointOfService.Management.Explorer..ctor()

at Microsoft.PointOfService.Management.Explorer..cctor()

---------------------------
OK
---------------------------

Interfacing with Biometric Devices from POS applications

Wed, 23 Sep 2009 16:34:20 Z

A new blog has been posted to help people who want to interface with biometric devices (such as fingerprint readers). It is on the team blog site here:

http://blogs.msdn.com/pointofservice/archive/2009/09/23/interfacing-with-biometric-devices-from-pos-applications.aspx

Printing an DevExpress Report using an OPOS Printer

Mon, 02 Nov 2009 08:36:07 Z

Good Morning Everyone,

I have been struggling for a few days now, trying to print an DevExppress report to an OPOS printer using the Microsoft Point of Service component.

Does anyone know if it is possible to do so, and if so has a code sample that I can have a look at or a few hints on how this could be done?

Thanks in advance.

POS through Citrix

Fri, 30 Oct 2009 14:07:37 Z

Hi all,

I have been in a team developing a cash register system using Microsoft POS for .Net. So far so good, the devices work properly.

However, now we're considering launching the application through Citrix. The problem here is how do we let the application know about local environment and pick up the local OPOS devices?

Any suggestions?
Thanks in advance!

ESC/POS printer SO

Wed, 05 Aug 2009 06:49:08 Z

We need to develop a SO for ESC/POS printer under POS for .NET.
We are new at this area and want to estimate how many effort will be cost to develop such a service object. (about how many weeks per person) Are there any reference code is this case??

Microsoft.PointOfService

Thu, 01 Oct 2009 13:23:10 Z

Hi all,

I'm writing a POS Web application under Windows XP with .NET 2.0. I have an Epson TM-T88IV thermal printer where I downloaded and installed both Microsoft POS for .NET 1.11 and Epson OPOS for .NET 1.11.6. I wrote the following testing ActiveX control:

using System;

using System.Collections;

using System.ComponentModel;

using System.Drawing;

using System.Data;

using System.Reflection;

using System.Runtime.CompilerServices;

using System.Security;

using System.Security.Permissions;

using System.Windows.Forms;

using Microsoft.PointOfService;



[assembly: AssemblyVersion("1.0.0.6")]

[assembly: AllowPartiallyTrustedCallers]

namespace printer

{

    /// &ltsummary>

    /// Summary description for rtfcontrol.

    /// </summary>

    public class ThermalPrinter : System.Windows.Forms.UserControl

    {

        private System.Windows.Forms.Button btnPrint;

        /// &ltsummary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.Container components = null;



        public ThermalPrinter()

        {

            // This call is required by the Windows.Forms Form Designer.

            InitializeComponent();

        }



        /// &ltsummary>

        /// Clean up any resources being used.

        /// </summary>

        protected override void Dispose(bool disposing)

        {

            if (disposing)

            {

                if (components != null)

                    components.Dispose();

            }

            base.Dispose(disposing);

        }



        #region Component Designer generated code

        /// &ltsummary>

        /// Required method for Designer support - do not modify 

        /// the contents of this method with the code editor.

        /// </summary>

        private void InitializeComponent()

        {

            this.btnPrint = new System.Windows.Forms.Button();

            this.SuspendLayout();

            // 

            // btnPrint

            // 

            this.btnPrint.Location = new System.Drawing.Point(80, 48);

            this.btnPrint.Name = "btnPrint";

            this.btnPrint.Size = new System.Drawing.Size(108, 36);

            this.btnPrint.TabIndex = 0;

            this.btnPrint.Text = "Print";

            this.btnPrint.Click += new System.EventHandler(this.btnPrint_Click);



            this.Controls.AddRange(new Control[] { btnPrint });



            this.Load += new System.EventHandler(this.frmStep1_Load);

            this.ResumeLayout(false);



        }

        #endregion



        /// <summary>

        /// PosPrinter object

        /// </summary>

        PosPrinter m_Printer = null;



        /// <summary>

        ///  A method "Print" calls some another method.

        ///  They are method for printing.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void btnPrint_Click(object sender, System.EventArgs e)

        {

            //<<<step1>>> Start

            try

            {

                //As using the PrintNormal method, send strings to a printer, and print it

                //[\n] is the standard code for starting a new line.

                m_Printer.PrintNormal(PrinterStation.Receipt, "Hello OPOS for .Net\n");

            }

            catch (PosControlException)

            {

            }

            //<<<step1>>> End

        }



        /// <summary>

        /// When the method "changeButtonStatus" was called,

        /// all buttons other than a button "closing" become invalid.

        /// </summary>

        private void ChangeButtonStatus()

        {

            btnPrint.Enabled = false;

        }



        /// <summary>

        /// The processing code required in order to enable to use of service is written here.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]

        private void frmStep1_Load(object sender, System.EventArgs e)

        {

            //<<<step1>>>--Start

            //Use a Logical Device Name which has been set on the SetupPOS.

            string strLogicalName = "ThermalPrinter";



            try

            {

                //Create PosExplorer

                PosExplorer posExplorer = new PosExplorer();



                DeviceInfo deviceInfo = null;



                try

                {

                    deviceInfo = posExplorer.GetDevice(DeviceType.PosPrinter, strLogicalName);

                    m_Printer = (PosPrinter)posExplorer.CreateInstance(deviceInfo);

                }

                catch (Exception err)

                {

                    MessageBox.Show("Exception", err.Message);

                    ChangeButtonStatus();

                    return;

                }



                //Open the device

                m_Printer.Open();



                //Get the exclusive control right for the opened device.

                //Then the device is disable from other application.

                m_Printer.Claim(1000);



                //Enable the device.

                m_Printer.DeviceEnabled = true;

            }

            catch (PosControlException)

            {

                ChangeButtonStatus();

            }

            //<<<step1>>>--End

        }

    }

}

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="Test.Default" %>



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

    <title>Test</title>

</head>

<body>

    <form id="form1" runat="server">

        <div>

	<object id="rtfcontrol" height="472" width="488"

         classid="../../ThermalPrinter.dll#printer.ThermalPrinter">

     </object>

        </div>

    </form>

</body>

</html>

At first, when I run the program in a remote PC, I got the following error message:

See the end of this message for details on invoking 

just-in-time (JIT) debugging instead of this dialog box.



************** Exception Text **************

System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)

   at System.Security.CodeAccessPermission.Demand()

   at System.Environment.GetFolderPath(SpecialFolder folder)

   at Microsoft.PointOfService.InternalLogger.Initialize()

   at Microsoft.PointOfService.InternalLogger..ctor()

   at Microsoft.PointOfService.Logger.get_s_logger()

   at Microsoft.PointOfService.Logger.Info(String caller, String message)

   at Microsoft.PointOfService.PosExplorer..ctor()

   at devhood.ThermalPrinter.frmStep1_Load(Object sender, EventArgs e)

   at System.Windows.Forms.UserControl.OnLoad(EventArgs e)

   at System.Windows.Forms.UserControl.OnCreateControl()

   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

   at System.Windows.Forms.Control.CreateControl()

   at System.Windows.Forms.Control.WmShowWindow(Message& m)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

   at System.Windows.Forms.ContainerControl.WndProc(Message& m)

   at System.Windows.Forms.UserControl.WndProc(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

   at System.Windows.Forms.Control.ActiveXImpl.System.Windows.Forms.IWindowTarget.OnMessage(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

The action that failed was:

Demand

The type of the first permission that failed was:

System.Security.Permissions.FileIOPermission

The Zone of the assembly that failed was:

MyComputer





************** Loaded Assemblies **************

mscorlib

    Assembly Version: 2.0.0.0

    Win32 Version: 2.0.50727.42 (RTM.050727-4200)

    CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll

----------------------------------------

System

    Assembly Version: 2.0.0.0

    Win32 Version: 2.0.50727.42 (RTM.050727-4200)

    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll

----------------------------------------

ThermalPrinter

    Assembly Version: 1.0.0.1

    Win32 Version: n/a

    CodeBase: http://192.168.1.2:424/ThermalPrinter.DLL

----------------------------------------

System.Windows.Forms

    Assembly Version: 2.0.0.0

    Win32 Version: 2.0.50727.42 (RTM.050727-4200)

    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll

----------------------------------------

System.Drawing

    Assembly Version: 2.0.0.0

    Win32 Version: 2.0.50727.42 (RTM.050727-4200)

    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll

----------------------------------------

Microsoft.PointOfService

    Assembly Version: 1.11.0.0

    Win32 Version: 1.11.1139.0

    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Microsoft.PointOfService/1.11.0.0__31bf3856ad364e35/Microsoft.PointOfService.dll

----------------------------------------

Accessibility

    Assembly Version: 2.0.0.0

    Win32 Version: 2.0.50727.42 (RTM.050727-4200)

    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Accessibility/2.0.0.0__b03f5f7f11d50a3a/Accessibility.dll

----------------------------------------

Microsoft.mshtml

    Assembly Version: 7.0.3300.0

    Win32 Version: 7.0.3300.0

    CodeBase: file:///C:/WINDOWS/assembly/GAC/Microsoft.mshtml/7.0.3300.0__b03f5f7f11d50a3a/Microsoft.mshtml.dll

----------------------------------------



************** JIT Debugging **************

To enable just-in-time (JIT) debugging, the .config file for this

application or computer (machine.config) must have the

jitDebugging value set in the system.windows.forms section.

The application must also be compiled with debugging

enabled.



For example:



<configuration>

    <system.windows.forms jitDebugging="true" />

</configuration>



When JIT debugging is enabled, any unhandled exception

will be sent to the JIT debugger registered on the computer

rather than be handled by this dialog box.

After I made some changes with the coding and set the strong named dll in .NET Framework 2.0 Configuration with Full Trust, the Internet Explorer just frozen and I need to kill the Internet Explorer in Windows Task Manager. Anyone knows how can I solve this problem?

Thanks,
John

OPOS Printing hanging main application although printing done in secondary thread

Sat, 15 Aug 2009 15:27:27 Z

Hi,

I've recently acquired an EPOS application and I'm having some problems with printing under OPOS hanging the main thread. The print is done be a secondary thread so it's effect should be relatively mimimal on the main UI thread.

In theory at least (if I do a threading.thread.sleep in the print thread for e.g. 10 seconds before it starts to print, the UI thread still functions for those 10 seconds) any OPOS printing is done in the secondary thread.

I've got 2 printers, a thermal using the normal Epson OPOS driver (PosLigne TRP-100 using Epson ADK V2.50) and a dot-matrix (Bixolon SRP-275C using Bixolon Opos Driver V4.1.1).

They behave differently (as is often the way with drivers). The Epson OPOS driver hangs the main app thread when printing, but throws an error if, e.g., the printer runs out of paper or the print door is opened mid-print). The Bixolon doesn't hang the main thread, but will not notice errors mid-print (it errors on paper-out at the start of printing, but not during).

I'm mainly concerned with the main app locking up while printing. The processor doesn't go to max so I'm open to clues why something running in an independant thread can stop the main thread, or really any other thoughts or ideas on what might be going wrong.

Many thanks

Mike

POS LineDisplay Issue when Claim

Fri, 30 Oct 2009 09:25:47 Z

Hi All,

My code to Show info in PoleDisplay is

DeviceInfo

oDevice = myExplorer.GetDevice(DeviceType.LineDisplay, "POSLineDisplay");
oDisplay = (LineDisplay)myExplorer.CreateInstance(oDevice);
if (oDisplay != null)
{
oDisplay.Open();
oDisplay.Claim(1000); // Exception throwing here
oDisplay.DeviceEnabled = true;
oDisplay.ClearText();
oDisplay.DisplayTextAt(line, 0, textToDisplay);
oDisplay.Release();
oDisplay.Close();
}

even the PoleDisplay is Pluggedin and ON still getting the error.

Error Message :
Method ClaimDevice threw an exception. The device is not connected to the system or is not powered on.

Please help to fix this.

Barcode Scanner reading

Sun, 18 Oct 2009 08:42:41 Z

Thanks Seam for your answer

I have a barcode scanner mode Z3010 of Zebex with USB connection.
I want to provide a solution to a customer that will use this barcode to scan data which can be scanned only with my software but not with any other scanner without the software. Is it possible!

If yes pls help me how i can do that with provide some clue.

ESC/POS Black Mark Command

Wed, 21 Oct 2009 08:04:45 Z

i need a sample code for c# for set the position of the paper in correspondence of the top of the form using the black mark feed command.
Anyone can help me?

thanks

Sergio

Reading Data from Scanner

Thu, 22 Oct 2009 09:08:23 Z

Hi Everybody

Is it possible to capture raw data from scanner before it is transformed into encoded in any symbology.
If yes. Is there anybody who can help me.

POS Device utilization exaples and questions

Wed, 28 Oct 2009 06:51:40 Z

Hi All,

I have few doubts regarding POS Device usage with OPOS.

Currantly I am using List of POS Devices are
a. Printer ----EPSON Printer (TM-T88IV) Model (not usb device)
b. LineDisplay/PoleDisplay -----POSIFLEX (PD-300) (not usb, i.e COM Port)

my questions are

1. Do I need to install the software for Printer and Line Diplay to use.
2. Where wolud I get the service objects for these devices. (from vendor of the devices, which we purchaged ?)
3. How would I Create a New Service Object for Printer/Line Dispaly/any other POS Device ? please post Sample code in C#.

Thanks in advance.

Can somebody teach me how to print a receipt with EPSON TM- U200 POS Receipt Printer?

Mon, 26 Oct 2009 10:53:00 Z

Hi i am a newbie at all for printing codes and i dont know where to start printing, so i need somebody to give a very good and brief clear instruction to how and where to put my records for printing, i was coming up to think about creating a listview with white boarders at a Form with None Style but unfortunately my height is stable size and i want it auto size for my receipt. anyone could give me a better idea for printing? or better format to arrange my recrods for bill number? i have heard from my friends that i have to code my format for the receipt before printing it i dont even know what and how many tools to use before printing and coding it, i hope for your considerations. i just need some instruction.

Thanks

OPOS driver support in POS for .NET

Mon, 10 Aug 2009 16:00:55 Z

Hi to everybody!
First of all let me say that i'm new to this MS world.
I am trying to develop a POS application which has a WPF UI (so i am not a hardware guy seeking for info for how to develop a service). Recently i discovered the POS for .NET Framework (actually i don't know why that late), and i realize i have to throw away code i 've written.

Some things are not very clear to me so what i want to ask is:
1. if a device (for example a receipt printer) has an OPOS driver, can i be sure that at runtime my software will find this device when i call explorer.GetDevices() (i am not interested in Plug 'n Play functionalities.) ?
2. can i install this WPF "enabled" application to a desktop PC running Windows XP, with all these 'POS for .NET' functionalities working correctly (or do i have to install on an OS like POSReady 2009)?
3. Is POSReady 2009 capable of running WPF applications (normaly it should since there is .NET 3.5 support)?

Thanks in advance

How to open a Cash Drawer using C#.NET..?

Wed, 12 Aug 2009 11:36:48 Z

Hi all,

I am developing a POS Application. Here I want to Open a Cash Drawer. Is it different procedures to Open different types of Cash drawers.

Can anybody help me on this...

Can I use MS .NET POS SDK for this purpose...

Thanks in Advance

Send ASCII value through Serial port using OPOS drivers

Sun, 25 Oct 2009 18:33:32 Z

I have point of sale system (catapult ECRS) and would like to send every transaction to my DVR to monitor cashier’s activity. Catapult sells their DVR system, which I don't like. I spoke to them about making connection from Catapult to my DVR, and they said the only other way you can do this by sending ASCII value through the serial port. They also told me that I need get some kind of OPOS driver that sends out every transaction through the serial port. This system only recognizes OPOS drivers. I bought the POS data capture box from AverMedia, but this box depend on what is being sent by the POS and I know POS is not sending anything, there aren’t any OPOS driver select inside the system. Can anyone help me out with this? I will owe you nice bottle of wine if you can help me out. Thanks.

OPOS Service Object causes application crash

Mon, 19 Oct 2009 15:54:27 Z

Hi all,

I appears that the OPOS service object of our printer is sometimes misbehaving and causing our application to crash completely. I'm saying service object here, but it might as well be caused by another (driver) component that is out of our control. If we disable the printer we never have a crash.

I could live with an exception being thrown when something goes wrong, but in this case the application just terminates without giving us a chance to react - no exception is thrown. I didn't even realize that an external (unmanaged) dll could crash the .NET runtime. I would expect Pos for .NET to handle this situation, but apparently it does not. Is there any known solution for this? This probably is a more general problem, so any pointers to a solution are appreciated.

Thanks,

Bert.

Reading Data by barcode scanner before decoding any Symbiology

Wed, 21 Oct 2009 17:56:02 Z

Hi Everybody

I want to devlop an application that will use barcode scanner to identify exam script that script will be identified only by the application.
Scanners will not able to read data without the application. The data will not be readable with any scanner except using the application.
Whether POS for .NET will be helpful or not.

Anybody is there to help me with any suggestions.

What platforums does POS for .NET work on?

Thu, 15 Oct 2009 15:28:31 Z

The only documentation I've found indicates that POS for .NET is for embedded windows. My question is will it work in desktop apps, and if so how do I get the libs into VS2008? I've downloaded and installed the 1.12 from the links in this form but I don't see any references to add nor can I import the libs into a project.

Thanks in advance.

Jacob

Verify POS for .Net is installed

Mon, 19 Oct 2009 12:10:51 Z

I have written an application that provides support for printers using POS for .Net. However, it is not certain that the POS for .Net application will be installed on the system running my application. How can I verify that POS for .Net is installed on the system?