我目前正在试用 VB.NET PrinterSample_Step1, "Hello OPOS for .Net" 。我已经使用 EPSON 高级驱动程序安装了 TM-H6000IV 的驱动程序，并在 SetUpPOS for OPOS.NET 中进行了设置。当我运行示例程序时，它会返回异常：{"The printer is currently being initialized."}. 当我运行 CheckHealthTest 时，它会卡在这个屏幕上：https ://imgur.com/41Z26Ny ，它会返回这个错误：https ://imgur.com/avz0wyz 。这是示例程序中的代码：
Imports Microsoft.PointOfService
Public Class FrameStep1
Inherits System.Windows.Forms.Form
Private m_Printer As Microsoft.PointOfService.PosPrinter = Nothing
#Region " Windows Forms Designer generated code."
Public Sub New()
MyBase.New()
' The InitializeComponent() call is required for windows Forms designer support.
InitializeComponent()
' TODO: Add counstructor code after the InitializeComponent() call.
End Sub
' Rear treatment is carried out in the resource being used.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
' Design variable.
Private components As System.ComponentModel.IContainer
' This method is required for Windows Forms designer support.
'Do not change the method contents inside the source code editor.
' The Forms designer might not be able to load this method if it was changed manually.
Friend WithEvents btnPrint As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.btnPrint = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'btnPrint
'
Me.btnPrint.Location = New System.Drawing.Point(84, 40)
Me.btnPrint.Name = "btnPrint"
Me.btnPrint.Size = New System.Drawing.Size(120, 32)
Me.btnPrint.TabIndex = 0
Me.btnPrint.Text = "Print"
'
'FrameStep1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 12)
Me.ClientSize = New System.Drawing.Size(280, 125)
Me.Controls.Add(Me.btnPrint)
Me.MaximizeBox = False
Me.Name = "FrameStep1"
Me.Text = "Step1 Print ""Hello OPOS for .Net"""
Me.ResumeLayout(False)
End Sub
#End Region
''' <summary>
''' A method "Print" calls some another method.
''' They are method for printing.
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
Private Sub btnPrint_Click(ByVal sender As System.Object _
, ByVal e As System.EventArgs) Handles btnPrint.Click
'<<<step1>>> Start
Try
'As using the PrintNormal method, send strings to a printer, and print it
'[vbCrLf] is the standard code for starting a new line.
m_Printer.PrintNormal(PrinterStation.Receipt, "Hello OPOS for .Net" + vbCrLf)
Catch ex As PosControlException
End Try
'<<<step2>>> End
End Sub
''' <summary>
''' When the method "changeButtonStatus" was called,
''' all buttons other than a button "closing" become invalid.
''' </summary>
Private Sub ChangeButtonStatus()
'Disable control.
btnPrint.Enabled = False
End Sub
''' <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>
Private Sub FrameStep1_Load(ByVal sender As System.Object _
, ByVal e As System.EventArgs) Handles MyBase.Load
'<<<step1>>>--Start
'Use a Logical Device Name which has been set on the SetupPOS.
Dim strLogicalName As String
Dim deviceInfo As DeviceInfo
Dim posExplorer As PosExplorer
strLogicalName = "PosPrinter2"
'Create PosExplorer
posExplorer = New PosExplorer
m_Printer = Nothing
Try
deviceInfo = posExplorer.GetDevice(DeviceType.PosPrinter, strLogicalName)
m_Printer = posExplorer.CreateInstance(deviceInfo)
Catch ex As Exception
ChangeButtonStatus()
Return
End Try
Try
'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 ex As PosControlException
ChangeButtonStatus()
End Try
'<<<step1>>>--End
End Sub
''' <summary>
''' When the method "closing" is called,
''' the following code is run.
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
Private Sub FrameStep1_Closing(ByVal sender As Object _
, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
'<<<step1>>>--Start
If m_Printer Is Nothing Then
Return
End If
Try
'Cancel the device
m_Printer.DeviceEnabled = False
'Release the device exclusive control right.
m_Printer.Release()
Catch ex As Exception
Finally
'Finish using the device.
m_Printer.Close()
End Try
'<<<step1>>>--End
End Sub
End Class
异常将在以下几行中被捕获：
Private Sub btnPrint_Click(ByVal sender As System.Object _
, ByVal e As System.EventArgs) Handles btnPrint.Click
'<<<step1>>> Start
Try
'As using the PrintNormal method, send strings to a printer, and print it
'[vbCrLf] is the standard code for starting a new line.
m_Printer.PrintNormal(PrinterStation.Receipt, "Hello OPOS for .Net" + vbCrLf)
Catch ex As PosControlException
End Try
'<<<step2>>> End
End Sub
我发现了这个问答：https ://okbizcs.okwave.jp/epson/questiondetail/?qid=8318452但它似乎与这个问题无关。
这是 CheckHealthTest 的完整例外：
================== Exception =====================
Microsoft.PointOfService.PosControlException
ErrorCode : Offline (108)
ErrorCodeExtended : 5010
Message : The printer is currently being initialized.
Target : System.String CheckHealth(Microsoft.PointOfService.HealthCheckLevel)
## StackTrace ##
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.CheckHealth(HealthCheckLevel level)
at CheckHealthTest.MainForm.ExecuteCheckHealth(DeviceInfo objInfo)
at CheckHealthTest.MainForm.btnCheckHealth_Click(Object sender, EventArgs e)
---------InnerException-----------
jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterStateException
Message : The printer is currently being initialized.
Target : Void ConfirmConditionForNotOfflineCommand(Int32)
## StackTrace ##
at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmConditionForNotOfflineCommand(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.CheckError(Int32[] aiStationIndex, Boolean bAfterQueue)
这是程序的堆栈跟踪：
ErrorCode: Failure
ErrorCodeExtended: 0
Stack trace: at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at Microsoft.PointOfService.PosException.GetExceptionText(Exception e)
at Microsoft.PointOfService.PosException.LogError()
at Microsoft.PointOfService.PosControlException..ctor(String message, ErrorCode errorCode, Int32 errorCodeExtended)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.OutputData(Byte[] abyData, Boolean bAddSelect, Int64 lTimeout, Boolean bFlow)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.OutputData(Byte[] abyData, Boolean bFlow)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.GetPrinterStatus(Boolean bFullCheck, Int64 lTimeout)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.GetPrinterStatus(Boolean bFullCheck)
at jp.co.epson.upos.H6000IV.pntr.init.H6000IV_Initialization.InitializeCommon()
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.Initialize()
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.Initialize(Int32 iResetCounter)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.InitializationThread.ThreadProcess()
at jp.co.epson.uposcommon.core.v1_14_0001.util.EpsonCommonThread.Run()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
[PosException]: Microsoft.PointOfService.PosControlException: The device is offline.
ErrorCode: Failure
ErrorCodeExtended: 0
Stack trace: at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at Microsoft.PointOfService.PosException.GetExceptionText(Exception e)
at Microsoft.PointOfService.PosException.LogError()
at Microsoft.PointOfService.PosControlException..ctor(String message, ErrorCode errorCode, Int32 errorCodeExtended)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.OutputData(Byte[] abyData, Boolean bAddSelect, Int64 lTimeout, Boolean bFlow)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.GetRealtimeStatus()
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.GetPrinterStatus(Boolean bFullCheck, Int64 lTimeout)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.GetPrinterStatus(Boolean bFullCheck)
at jp.co.epson.upos.H6000IV.pntr.init.H6000IV_Initialization.InitializeCommon()
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.Initialize()
at jp.co.epson.upos.core.v1_14_0001.pntr.init.AbstractPrinterInitialization.Initialize(Int32 iResetCounter)
at jp.co.epson.upos.core.v1_14_0001.pntr.init.InitializationThread.ThreadProcess()
at jp.co.epson.uposcommon.core.v1_14_0001.util.EpsonCommonThread.Run()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
[PosException]: Microsoft.PointOfService.PosControlException: The printer is currently being initialized. ---> jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterStateException: The printer is currently being initialized.
at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmConditionForNotOfflineCommand(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmCondition(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.CheckError(Int32[] aiStationIndex, Boolean bAfterQueue)
--- End of inner exception stack trace ---
ErrorCode: Failure
ErrorCodeExtended: 0
Stack trace: at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at Microsoft.PointOfService.PosException.GetExceptionText(Exception e)
at Microsoft.PointOfService.PosException.LogError()
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonUPOSExceptionCreator.CreatePosControlException(Int32 iErrorCode, Int32 iErrorCodeExtended, String strMessage, Exception orgException)
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonUPOSExceptionCreator.CreatePosControlException(PrinterStateException orgException, Boolean bAfterQueue)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.CheckError(Int32[] aiStationIndex, Boolean bAfterQueue)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.OutputToPrinterImp(OutputDataStruct dataStruct, Boolean fromPrinterService)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.OutputToPrinter(OutputDataStruct dataStruct)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.OutputToPrinterForProcessID_EJ.OutputToPrinter(OutputDataStruct dataStruct)
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.SendOutputData(OutputDataStruct outputData, Int32 iTransmitType, Boolean bAsync, Boolean bFlow, Boolean bImmediate)
at jp.co.epson.upos.H6000IV.pntr.H6000IVService.SendOutputData(OutputDataStruct outputData, Int32 iTransmitType, Boolean bAsync, Boolean bFlow, Boolean bImmediate)
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.SendOutputData(OutputDataStruct outputData, Boolean bAsync, Boolean bFlow, Boolean bImmediate)
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.ExecuteNormalPrint(Int32 iStationIndex, String strData, Boolean bTransaction, Boolean bFlow, Boolean bImmediate)
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.PrintNormal(PrinterStation station, String strData)
at jp.co.epson.upos.H6000IV.pntr.H6000IVService.PrintNormal(PrinterStation station, String strData)
at PrinterSample_Step1.FrameStep1.btnPrint_Click(Object sender, EventArgs e) in D:\Epson-OPOS-ADK\Samples\VB.NET\Printer\PrinterSample_Step1\FrameStep1.vb:line 78
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at PrinterSample_Step1.FrameStep1.Main()
Inner Exception: jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterStateException: The printer is currently being initialized.
at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmConditionForNotOfflineCommand(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmCondition(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.CheckError(Int32[] aiStationIndex, Boolean bAfterQueue)
Stack trace: at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmConditionForNotOfflineCommand(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.state.PrinterState_USBSerialCompatible.ConfirmCondition(Int32 iStation)
at jp.co.epson.upos.core.v1_14_0001.pntr.io.CommonOutputToPrinterAndEJ.CheckError(Int32[] aiStationIndex, Boolean bAfterQueue)
Exception thrown: 'Microsoft.PointOfService.PosControlException' in Epson.opos.tm.service.v1_14_0001.dll
The program '[16316] PrinterSample_Step1.exe' has exited with code -1 (0xffffffff).