public override void Open()
{
if (string.IsNullOrWhiteSpace(_oposDeviceName))
{
try
{
_oposDeviceName = GetConfigurationProperty("OposDeviceName");
_oposDeviceName.Trim();
}
catch
{
_oposDeviceName = "";
}
}
if (string.IsNullOrWhiteSpace(_oposDeviceName))
{
string strMessage = "OposDeviceName is not configured on " + DevicePath + ".";
throw new Microsoft.PointOfService.PosControlException(strMessage, ErrorCode.NoExist);
}
if (_cco == null)
{
try
{
// CCO object CreateInstance
_cco = new POS.Devices.OPOSPOSPrinter();
// Register event handler
_cco.DirectIOEvent += new _IOPOSPOSPrinterEvents_DirectIOEventEventHandler(_cco_DirectIOEvent);
_cco.ErrorEvent += new _IOPOSPOSPrinterEvents_ErrorEventEventHandler(_cco_ErrorEvent);
_cco.OutputCompleteEvent += new _IOPOSPOSPrinterEvents_OutputCompleteEventEventHandler(_cco_OutputCompleteEvent);
_cco.StatusUpdateEvent += new _IOPOSPOSPrinterEvents_StatusUpdateEventEventHandler(_cco_StatusUpdateEvent);
}
catch
{
string strMessage = "Can not create Common ControlObject on " + DevicePath + ".";
throw new Microsoft.PointOfService.PosControlException(strMessage, ErrorCode.Failure);
}
}
VerifyResult(_cco.Open(_oposDeviceName));
}