SCAN_SDT_UNKNOWN - 摩托罗拉OPOS扫描仪

Question

我的扫描仪集成收到了一个奇怪的错误。我正在我的程序中使用OPOS扫描仪。当程序关闭时，我禁用，释放和关闭设备，但程序运行后没有其他应用程序可以使用它。另外如果我重新启动没有应用程序可以使用它甚至不是我的应用程序导致问题。我确实发现，如果我没有声称设备，问题就不会发生。我目前正在尝试获取DLL的新副本，以防释放方法以某种方式损坏？还有其他想法吗？

    public bool InitBarcode(bool overrideLGBarcode)
    {
        Util.LogMessage("Initializing barcode scanner!");
        if (_barcodeScanner == null)
        {
            Util.LogMessage("Barcode scanner was null. instantiating a new one");
            _barcodeScanner = new OPOSScanner();
            _barcodeScanner.AutoDisable = true;
            _barcodeScanner.DataEvent += BarcodeDataEventHandler;
            Util.LogMessage("Added event handler");
        }
        else
        {
            Util.LogMessage("Barcode scanner was not null");
        }

        if (_barcodeScanner.Open("STI_USBSCANNER") != 0)
        {
            Util.LogMessage("Barcode scanner \"STI_USBSCANNER\" could not be opened!");
            return false;
        }
        else
        {
            Util.LogMessage("STI_USBSCANNER was opened");
        }

        int result = _barcodeScanner.ClaimDevice(-1);
        Util.LogMessage("Claiming barcode scanner returned result: " + result);


        _barcodeScanner.DecodeData = true;
        _barcodeScanner.DeviceEnabled = true;
        _barcodeScanner.DataEventEnabled = true;

        return true;
    }

    public void CloseBarcode()
    {
        Util.LogMessage("Disabling, Releasing and Closing the barcode scanner!");
        _barcodeScanner.DataEvent -= BarcodeDataEventHandler;
        Util.LogMessage("Removed event handler");
        _barcodeScanner.AutoDisable = false;
        _barcodeScanner.DecodeData = false;
        _barcodeScanner.DataEventEnabled = false;
        _barcodeScanner.DeviceEnabled = false;

         if (_barcodeScanner.DeviceEnabled != false)
         {
             Util.LogMessage("Barcode scanner could not be disabled!");
         }
         else
         {
             Util.LogMessage("Barcode scanner was disabled!");
         }

        int result = _barcodeScanner.ReleaseDevice();
        Util.LogMessage("ReleseDevice() yielded result of: " + result);
        if (result != 0)
        {
            Util.LogMessage("Barcode scanner could not be released!");
        }
        else
        {
            Util.LogMessage("Barcode scanner was released!");
        }


        if (_barcodeScanner.Close() != 0)
        {
            Util.LogMessage("Barcode scanner could not be closed!");
        }
        else
        {
            Util.LogMessage("Barcode scanner was closed!");
        }
         _barcodeScanner = null;
    }