Escanee libros con el escáner de código de barras C#
Categoría del blog: Barcode ; .NET
09.06.2025
				
				
				
/// <summary>
/// Reads barcode from a <see cref="System.Drawing.Bitmap"/>.
/// </summary>
/// <param name="bitmap">A bitmap with barcodes.</param>
public static void ReadIsbnBarcodesFromBitmap(System.Drawing.Bitmap bitmap)
{
    // create barcode reader
    using (Vintasoft.Barcode.BarcodeReader reader = new Vintasoft.Barcode.BarcodeReader())
    {
        // specify that reader must search for ISBN barcodes
        reader.Settings.ScanBarcodeTypes = Vintasoft.Barcode.BarcodeType.ISBN;
        // read barcodes from image
        Vintasoft.Barcode.IBarcodeInfo[] infos = Vintasoft.Barcode.GdiExtensions.ReadBarcodes(reader, bitmap);
        // if barcodes are not detected
        if (infos.Length == 0)
        {
            System.Console.WriteLine("No barcodes found.");
        }
        // if barcodes are detected
        else
        {
            // get information about extracted barcodes
            System.Console.WriteLine(string.Format("{0} barcodes found:", infos.Length));
            System.Console.WriteLine();
            for (int i = 0; i < infos.Length; i++)
            {
                Vintasoft.Barcode.IBarcodeInfo info = infos[i];
                System.Console.WriteLine(string.Format("[{0}:{1}]", i + 1, info.BarcodeType));
                System.Console.WriteLine(string.Format("Value:      {0}", info.Value));
                System.Console.WriteLine(string.Format("Region:     {0}", info.Region));
                System.Console.WriteLine();
            }
        }
    }
}
				
public partial class IsbnBarcodeScannerForm : Form
{
    /// <summary>
    /// The camera barcode scanner.
    /// </summary>
    ImagingCameraBarcodeScanner _cameraBarcodeScanner;
    /// <summary>
    /// Initializes a new instance of the <see cref="IsbnBarcodeScannerForm"/> class.
    /// </summary>
    public IsbnBarcodeScannerForm()
    {
        InitializeComponent();
        _cameraBarcodeScanner = new ImagingCameraBarcodeScanner();
        _cameraBarcodeScanner.BarcodeScanner.FrameScanFinished += BarcodeScanner_FrameScanFinished;
        _cameraBarcodeScanner.ScanningException += CameraBarcodeScanner_ScanningException;
        _cameraBarcodeScanner.BarcodeScanner.ScannerSettings.ScanBarcodeTypes = Vintasoft.Barcode.BarcodeType.QR;
    }
    /// <summary>
    /// Starts the capturing of images from seleced device and recognition of barcodes in captured images.
    /// </summary>
    private void startButton_Click(object sender, EventArgs e)
    {
        textBox1.Text = "Scan Barcodes Types: " + _cameraBarcodeScanner.BarcodeScanner.ScannerSettings.ScanBarcodeTypes.ToString();
        _cameraBarcodeScanner.CaptureDevice = _cameraBarcodeScanner.CaptureDevices[0];
        _cameraBarcodeScanner.StartScanning();
    }
    /// <summary>
    /// Stops the capturing of images from seleced device and recognition of barcodes in captured images.
    /// </summary>
    private void stopButton_Click(object sender, EventArgs e)
    {
        textBox1.Text = "";
        _cameraBarcodeScanner.StopScanning();
    }
    /// <summary>
    /// Shows an error.
    /// </summary>
    private void CameraBarcodeScanner_ScanningException(object sender, Vintasoft.Imaging.ExceptionEventArgs e)
    {
        MessageBox.Show(e.Exception.ToString());
    }
    /// <summary>
    /// Handles the FrameScanFinished event of the BarcodeScanner.
    /// </summary>
    private void BarcodeScanner_FrameScanFinished(object sender, Vintasoft.Barcode.FrameScanFinishedEventArgs e)
    {
        if (e.FoundBarcodes.Length > 0)
            Invoke(new ShowRecognitionResultsDelegate(ShowRecognitionResults), new object[] { e.FoundBarcodes });
    }
    /// <summary>
    /// Shows barcode recognition results.
    /// </summary>
    private void ShowRecognitionResults(Vintasoft.Barcode.IBarcodeInfo[] barcodes)
    {
        StringBuilder result = new StringBuilder();
        foreach (Vintasoft.Barcode.IBarcodeInfo barcode in barcodes)
            result.AppendLine(string.Format("{0}: {1}", barcode.BarcodeType, barcode.Value));
        // show barcode recognition in text box
        textBox1.Text = result.ToString();
    }
    delegate void ShowRecognitionResultsDelegate(Vintasoft.Barcode.IBarcodeInfo[] barcodeInfo);
}
/// <summary>
/// Allows to capture images from DirectShow camera (VintaSoft Imaging .NET SDK) and recognize barcodes in captured images (VintaSoft Barcode .NET SDK).
/// </summary>
public class ImagingCameraBarcodeScanner : IDisposable
{
    #region Fields
    /// <summary>
    /// Monitor for capture devices.
    /// </summary>
    Vintasoft.Imaging.Media.ImageCaptureDevicesMonitor _captureDevicesMonitor;
    /// <summary>
    /// Image capture source for barcode recognition.
    /// </summary>
    Vintasoft.Imaging.Media.ImageCaptureSource _imageCaptureSource;
    #endregion
    #region Constructors
    /// <summary>
    /// Initializes a new instance of the <see cref="ImagingCameraBarcodeScanner"/> class.
    /// </summary>
    public ImagingCameraBarcodeScanner()
    {
        _barcodeScanner = new Vintasoft.Barcode.CameraBarcodeScanner();
        _barcodeScanner.FrameScanException += BarcodeScanner_FrameScanException;
        _barcodeScanner.ScannerSettings.ScanBarcodeTypes = Vintasoft.Barcode.BarcodeType.ISBN;
        _captureDevicesMonitor = new Vintasoft.Imaging.Media.ImageCaptureDevicesMonitor();
        _captureDevicesMonitor.CaptureDevicesChanged += CaptureDevicesMonitor_CaptureDevicesChanged;
        if (!Vintasoft.Imaging.ImagingEnvironment.IsInDesignMode)
            _captureDevicesMonitor.Start();
        _imageCaptureSource = new Vintasoft.Imaging.Media.ImageCaptureSource();
        _imageCaptureSource.CaptureCompleted += ImageCaptureSource_CaptureCompleted;
    }
    #endregion
    #region Properties
    Vintasoft.Imaging.Media.ImageCaptureDevice _captureDevice;
    /// <summary>
    /// Gets or sets current capture device.
    /// </summary>
    public Vintasoft.Imaging.Media.ImageCaptureDevice CaptureDevice
    {
        get
        {
            return _captureDevice;
        }
        set
        {
            if (_captureDevice != value)
            {
                _captureDevice = value;
                UpdateCapureFormats();
            }
        }
    }
    ReadOnlyCollection<Vintasoft.Imaging.Media.ImageCaptureFormat> _captureFormats = null;
    /// <summary>
    /// Gets the available capture formats of current capture device.
    /// </summary>
    /// <seealso cref="CaptureDevice"/>
    public ReadOnlyCollection<Vintasoft.Imaging.Media.ImageCaptureFormat> CaptureFormats
    {
        get
        {
            return _captureFormats;
        }
    }
    /// <summary>
    /// Gets available capture devices.
    /// </summary>
    public ReadOnlyCollection<Vintasoft.Imaging.Media.ImageCaptureDevice> CaptureDevices
    {
        get
        {
            return Vintasoft.Imaging.Media.ImageCaptureDeviceConfiguration.GetCaptureDevices();
        }
    }
    Vintasoft.Barcode.CameraBarcodeScanner _barcodeScanner;
    /// <summary>
    /// Gets the barcode scanner.
    /// </summary>
    public Vintasoft.Barcode.CameraBarcodeScanner BarcodeScanner
    {
        get
        {
            return _barcodeScanner;
        }
    }
    /// <summary>
    /// Gets a value indicating whether barcode scanning is started.
    /// </summary>
    public bool IsStarted
    {
        get
        {
            return _imageCaptureSource.State == Vintasoft.Imaging.Media.ImageCaptureState.Started;
        }
    }
    #endregion
    #region Methods
    #region PUBLIC
    /// <summary>
    /// Starts the capturing of images from seleced device and recognition of barcodes in captured images.
    /// </summary>
    public void StartScanning()
    {
        try
        {
            if (CaptureDevice == null)
                throw new ArgumentNullException("CaptureDevice");
            if (CaptureFormats == null || CaptureFormats.Count == 0)
                throw new ArgumentNullException("CaptureFormats");
            if (_imageCaptureSource.State != Vintasoft.Imaging.Media.ImageCaptureState.Started)
            {
                if (CaptureDevice.DesiredFormat == null)
                    CaptureDevice.DesiredFormat = CaptureFormats[0];
                _barcodeScanner.StartScanning();
                _imageCaptureSource.CaptureDevice = _captureDevice;
                _imageCaptureSource.Start();
                _imageCaptureSource.CaptureAsync();
                OnScanningStart(EventArgs.Empty);
            }
        }
        catch (Exception ex)
        {
            OnScanningException(new Vintasoft.Imaging.ExceptionEventArgs(ex));
        }
    }
    /// <summary>
    /// Stops the capturing of images from seleced device and recognition of barcodes in captured images.
    /// </summary>
    public void StopScanning()
    {
        try
        {
            if (_imageCaptureSource.State != Vintasoft.Imaging.Media.ImageCaptureState.Stopped)
            {
                _barcodeScanner.StopScanning();
                _imageCaptureSource.Stop();
                OnScanningStop(EventArgs.Empty);
            }
        }
        catch (Exception ex)
        {
            OnScanningException(new Vintasoft.Imaging.ExceptionEventArgs(ex));
        }
    }
    /// <summary>
    /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
    /// </summary>
    public void Dispose()
    {
        _captureDevicesMonitor.CaptureDevicesChanged -= CaptureDevicesMonitor_CaptureDevicesChanged;
        _barcodeScanner.BarcodeReader.Dispose();
    }
    #endregion
    #region PROTECTED
    /// <summary>
    /// Raises the <see cref="CaptureDevicesChanged" /> event.
    /// </summary>
    /// <param name="args">The <see cref="ImageCaptureDevicesChangedEventArgs"/> instance containing the event data.</param>
    protected virtual void OnCaptureDevicesChanged(Vintasoft.Imaging.Media.ImageCaptureDevicesChangedEventArgs args)
    {
        if (CaptureDevicesChanged != null)
            CaptureDevicesChanged(this, args);
    }
    /// <summary>
    /// Raises the <see cref="ScanningException" /> event.
    /// </summary>
    /// <param name="args">The <see cref="ExceptionEventArgs"/> instance containing the event data.</param>
    protected virtual void OnScanningException(Vintasoft.Imaging.ExceptionEventArgs args)
    {
        if (ScanningException != null)
            ScanningException(this, args);
    }
    /// <summary>
    /// Raises the <see cref="ScanningStart" /> event.
    /// </summary>
    /// <param name="args">The <see cref="EventArgs"/> instance containing the event data.</param>
    protected virtual void OnScanningStart(EventArgs args)
    {
        if (ScanningStart != null)
            ScanningStart(this, args);
    }
    /// <summary>
    /// Raises the <see cref="ScanningStop" /> event.
    /// </summary>
    /// <param name="args">The <see cref="EventArgs"/> instance containing the event data.</param>
    protected virtual void OnScanningStop(EventArgs args)
    {
        if (ScanningStop != null)
            ScanningStop(this, args);
    }
    #endregion
    #region PRIVATE
    /// <summary>
    /// Handles the FrameScanException event of the BarcodeScanner control.
    /// </summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The <see cref="Vintasoft.Barcode.FrameScanExceptionEventArgs"/> instance containing the event data.</param>
    private void BarcodeScanner_FrameScanException(object sender, Vintasoft.Barcode.FrameScanExceptionEventArgs e)
    {
        OnScanningException(new Vintasoft.Imaging.ExceptionEventArgs(e.Exception));
    }
    /// <summary>
    /// Handles the CaptureCompleted event of the ImageCaptureSource.
    /// </summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The <see cref="ImageCaptureCompletedEventArgs"/> instance containing the event data.</param>
    private void ImageCaptureSource_CaptureCompleted(object sender, Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs e)
    {
        try
        {
            // get captured image
            Vintasoft.Imaging.VintasoftImage image = e.GetCapturedImage();
            // recognize barcodes from captured image
            using (Vintasoft.Imaging.VintasoftBitmap bitmap = image.GetAsVintasoftBitmap())
                _barcodeScanner.ScanFrame(bitmap);
            // if image capturing is started
            if (_imageCaptureSource.State == Vintasoft.Imaging.Media.ImageCaptureState.Started)
            {
                // capture next image
                _imageCaptureSource.CaptureAsync();
            }
        }
        catch (Exception ex)
        {
            OnScanningException(new Vintasoft.Imaging.ExceptionEventArgs(ex));
        }
    }
    /// <summary>
    /// Handles the CaptureDevicesChanged event of the CaptureDevicesMonitor.
    /// </summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The <see cref="ImageCaptureDevicesChangedEventArgs"/> instance containing the event data.</param>
    private void CaptureDevicesMonitor_CaptureDevicesChanged(object sender, Vintasoft.Imaging.Media.ImageCaptureDevicesChangedEventArgs e)
    {
        if (Array.IndexOf(e.RemovedDevices, CaptureDevice) >= 0)
        {
            StopScanning();
        }
        OnCaptureDevicesChanged(e);
    }
    /// <summary>
    /// Updates the capture formats.
    /// </summary>
    private void UpdateCapureFormats()
    {
        Vintasoft.Imaging.Media.ImageCaptureDevice device = CaptureDevice;
        if (device == null || device.SupportedFormats == null)
        {
            _captureFormats = null;
        }
        else
        {
            List<Vintasoft.Imaging.Media.ImageCaptureFormat> captureFormats = new List<Vintasoft.Imaging.Media.ImageCaptureFormat>();
            List<uint> imageCaptureFormatSizes = new List<uint>();
            for (int i = 0; i < device.SupportedFormats.Count; i++)
            {
                // if format has bit depth less or equal than 12 bit
                if (device.SupportedFormats[i].BitsPerPixel <= 12)
                {
                    // ignore formats with bit depth less or equal than 12 bit because they may cause issues on Windows 8
                    continue;
                }
                uint imageCaptureFormatSize = (uint)(device.SupportedFormats[i].Width | (device.SupportedFormats[i].Height << 16));
                if (!imageCaptureFormatSizes.Contains(imageCaptureFormatSize))
                {
                    imageCaptureFormatSizes.Add(imageCaptureFormatSize);
                    captureFormats.Add(device.SupportedFormats[i]);
                }
            }
            _captureFormats = captureFormats.AsReadOnly();
        }
    }
    #endregion
    #endregion
    #region Events
    /// <summary>
    /// Occurs when barcode scanning is started.
    /// </summary>
    public event EventHandler ScanningStart;
    /// <summary>
    /// Occurs when barcode scanning is stopped.
    /// </summary>
    public event EventHandler ScanningStop;
    /// <summary>
    /// Occurs when barcode scanning error occurs.
    /// </summary>
    public event EventHandler<Vintasoft.Imaging.ExceptionEventArgs> ScanningException;
    /// <summary>
    /// Occurs when <see cref="CaptureDevices"/> property is changed.
    /// </summary>
    public event EventHandler<Vintasoft.Imaging.Media.ImageCaptureDevicesChangedEventArgs> CaptureDevicesChanged;
    #endregion
}