PrintNormal（）问题'它未初始化'

PrintNormal()

CheckHealth

void K8POSPrint()
{
    /// <summary>
    /// PosPrinter object
    /// </summary>
    PosPrinter m_Printer = null;
    try
    {
        //Use a Logical Device Name which has been set on the SetupPOS.
        string strLogicalName = "PosPrinter";
        try
        {
            //Create PosExplorer
            PosExplorer posExplorer = new PosExplorer();
            DeviceInfo deviceInfo = null;

            try
            {
                // Device Info is not null when the printer has the logical name
                deviceInfo = posExplorer.GetDevice(DeviceType.PosPrinter, strLogicalName);
                m_Printer = (PosPrinter)posExplorer.CreateInstance(deviceInfo);
            }
            catch (Exception ExDevice)
            {
            }

            //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;
            //    ////CheckHealth.
            //m_Printer.CheckHealth(Microsoft.PointOfService.HealthCheckLevel.Interactive);
            //    //As using the PrintNormal method, send strings to a printer, and print it [n] is the standard code for starting a new line.
            /// Current Issue Next Line thows an exception - 'It is not initialized' 
            m_Printer.PrintNormal(PrinterStation.Receipt, "Hey Now OPOS for .NETn");
            // the next line would throw the exception 'The specified station is not mounted.'
            // m_Printer.PrintNormal(PrinterStation.Slip,"Hey Now Slip OPOS.NETn");
        }
        catch (PosControlException)
        {

        }
    }
    catch (Exception ex)
    {

    }
}