public WiaDataSource(WIA.DeviceInfo info)
 {
   fIdent = info;
   fDevice = null;
   fItem = null;
   fCommonDialog = null;
 }
Esempio n. 2
0
        internal override Bitmap TakePicture()
        {
            Bitmap result = null;

            // take a picture
            WIA.Device device = m_deviceInfo.Connect();
            WIA.Item   item   = device.ExecuteCommand(WIA.CommandID.wiaCommandTakePicture);

            foreach (string format in item.Formats)
            {
                // transfer
                WIA.ImageFile imageFile = item.Transfer(format) as WIA.ImageFile;

                // save
                string tempFile = System.IO.Path.GetTempFileName();
                File.Delete(tempFile);
                imageFile.SaveFile(tempFile);

                // delete from cam
                DeleteItem(device.Items, item.ItemID);

                // return image
                MemoryStream ms = new MemoryStream(File.ReadAllBytes(tempFile));
                File.Delete(tempFile);
                result = (Bitmap)Bitmap.FromStream(ms);

                break;
            }

            return(result);
        }
 private void Close()
 {
   if(IsOpen)
   {
     fDevice = null;
     fItem = null;
     fCommonDialog = null;
   }
 }
 private bool Open()
 {
   if(IsOpen == false)
   {
     fDevice = fIdent.Connect();
     fItem = fDevice.Items[1] as WIA.Item;
     fCommonDialog = new WIA.CommonDialog();
   }
   return IsOpen;
 }
        private void Scan(object sender, RoutedEventArgs e)
        {
            try
            {
                AppBarButton button = sender as AppBarButton;
                // hmmm, reusing the device doesn't work because it somehow resets itself to capture higher resolution images.
                bool hasDevice = false; //  device != null;

                GetScannerAsync(new Action(() =>
                {
                    WIA.ImageFile imageFile = null;

                    if (!hasDevice)
                    {
                        imageFile = globalDialog.ShowAcquireImage(DeviceType: WIA.WiaDeviceType.ScannerDeviceType,
                                                                  Bias: WIA.WiaImageBias.MinimizeSize, Intent: WIA.WiaImageIntent.TextIntent, AlwaysSelectDevice: false);
                    }
                    else
                    {
                        WIA.Item scannerItem      = device.Items[1];
                        const string wiaFormatPNG = "{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}";
                        object scanResult         = globalDialog.ShowTransfer(scannerItem, wiaFormatPNG, false);
                        imageFile = (WIA.ImageFile)scanResult;
                    }

                    if (imageFile != null)
                    {
                        string temp = System.IO.Path.GetTempFileName();
                        if (File.Exists(temp))
                        {
                            File.Delete(temp);
                        }
                        imageFile.SaveFile(temp);
                        TempFilesManager.AddTempFile(temp);

                        AttachmentDialogImageItem image = new AttachmentDialogImageItem(temp);
                        AddItem(image);
                        LayoutContent();
                        SelectItem(image);
                        AutoCrop(image);
                    }
                }));
            }
            catch (Exception ex)
            {
                device = null;
                string message = GetWiaErrorMessage(ex);
                MessageBox.Show(this, message, "Scan Error", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }
        /// <summary>
        /// Scan a single image
        /// </summary>
        public byte[] ScanSingle(ScannerInfo source)
        {
            WIA.Device wiaDevice = source.GetDevice();
            // Manager
            WIA.DeviceManager wiaManager = new WIA.DeviceManager();

            try
            {
                // Get items
                WIA.Item wiaItem = wiaDevice.Items[1];
                int      inColor = 2, dpi = 300;
                wiaItem.Properties["6146"].set_Value((int)inColor);//Item MUST be stored in a variable THEN the properties must be set.
                wiaItem.Properties["6147"].set_Value(dpi);
                wiaItem.Properties["6148"].set_Value(dpi);

                //var imageFile = (ImageFile)(new CommonDialog()).ShowTransfer(wiaItem, "{B96B3CAB-0728-11D3-9D7B-0000F81EF32E}", false);

                var imageFile = wiaItem.Transfer("{b96b3caf-0728-11d3-9d7b-0000f81ef32e}") as WIA.ImageFile;
                //private static ImageFormat memoryBMP = new ImageFormat(new Guid("{b96b3caa-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat bmp = new ImageFormat(new Guid("{b96b3cab-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat emf = new ImageFormat(new Guid("{b96b3cac-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat wmf = new ImageFormat(new Guid("{b96b3cad-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat jpeg = new ImageFormat(new Guid("{b96b3cae-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat png = new ImageFormat(new Guid("{b96b3caf-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat gif = new ImageFormat(new Guid("{b96b3cb0-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat tiff = new ImageFormat(new Guid("{b96b3cb1-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat exif = new ImageFormat(new Guid("{b96b3cb2-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat photoCD = new ImageFormat(new Guid("{b96b3cb3-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat flashPIX = new ImageFormat(new Guid("{b96b3cb4-0728-11d3-9d7b-0000f81ef32e}"));
                // private static ImageFormat icon = new ImageFormat(new Guid("{b96b3cb5-0728-11d3-9d7b-0000f81ef32e}"));
                return(imageFile.FileData.get_BinaryData());

                //Bitmap image1 = (Bitmap)Image.FromFile(@"D:\omr\tagilid.bmp", true);
                //MemoryStream ms = new MemoryStream();
                //image1.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
                //return ms.ToArray();
            }
            catch (Exception)
            {
                throw;
            }
        }
        void scan(string scannerId)
        {
            scanner = null;
            foreach (WIA.DeviceInfo devInfo in manager.DeviceInfos)
            {
                if (devInfo.DeviceID == scannerId)
                {
                    scanner = devInfo.Connect();
                }
            }
            if (scanner == null)
            {
                throw new Exception("Selected scanner is unavailable!");
            }

            WIA.Item item = scanner.Items[1];

            try
            {
                commonDialog = null;
                commonDialog = new WIA.CommonDialog();
                scanInit();
                scannedImage = (WIA.ImageFile)commonDialog.ShowTransfer(item, wiaFormatBMP, false);
                imageBytes   = (byte[])scannedImage.FileData.get_BinaryData();
                MemoryStream ms = new MemoryStream(imageBytes);
                image = Image.FromStream(ms);
                pbScannedImage.Image = image;
            }
            catch (Exception e)
            {
                throw e;
            }
            finally
            {
                Marshal.ReleaseComObject(scannedImage);
            }
        }
    /// <summary>
    /// Use scanner to scan an image (scanner is selected by its unique id).
    /// </summary>
    /// <param name="scannerName"></param>
    /// <returns>Scanned images.</returns>
    public static List <Image> Scan(string scannerId)
    {
        List <Image> images = new List <Image>();

        bool hasMorePages = true;

        while (hasMorePages)
        {
            // select the correct scanner using the provided scannerId parameter
            WIA.DeviceManager manager = new WIA.DeviceManager();
            WIA.Device        device  = null;
            foreach (WIA.DeviceInfo info in manager.DeviceInfos)
            {
                if (info.DeviceID == scannerId)
                {
                    // connect to scanner
                    device = info.Connect();
                    break;
                }
            }

            // device was not found
            if (device == null)
            {
                // enumerate available devices
                string availableDevices = "";
                foreach (WIA.DeviceInfo info in manager.DeviceInfos)
                {
                    availableDevices += info.DeviceID + "\n";
                }

                // show error with available devices
                throw new Exception("The device with provided ID could not be found. Available Devices:\n" + availableDevices);
            }

            WIA.Item item = device.Items[1] as WIA.Item;

            try
            {
                // scan image
                WIA.ICommonDialog wiaCommonDialog = new WIA.CommonDialog();
                WIA.ImageFile     image           = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatBMP, false);

                // save to temp file
                string fileName = Path.GetTempFileName();
                File.Delete(fileName);
                image.SaveFile(fileName);
                image = null;

                // add file to output list
                images.Add(Image.FromFile(fileName));
            }
            catch (Exception exc)
            {
                throw exc;
            }
            finally
            {
                item = null;

                //determine if there are any more pages waiting
                WIA.Property documentHandlingSelect = null;
                WIA.Property documentHandlingStatus = null;

                foreach (WIA.Property prop in device.Properties)
                {
                    if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT)
                    {
                        documentHandlingSelect = prop;
                    }

                    if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_STATUS)
                    {
                        documentHandlingStatus = prop;
                    }
                }

                // assume there are no more pages
                hasMorePages = false;

                // may not exist on flatbed scanner but required for feeder
                if (documentHandlingSelect != null)
                {
                    // check for document feeder
                    if ((Convert.ToUInt32(documentHandlingSelect.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_SELECT.FEEDER) != 0)
                    {
                        hasMorePages = ((Convert.ToUInt32(documentHandlingStatus.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_STATUS.FEED_READY) != 0);
                    }
                }
            }
        }

        return(images);
    }
        public void Scan(WiaDocumentHandlingType handlingType      = WiaDocumentHandlingType.Feeder,
                         WiaDocumentHandlingType?duplexOrOtherMode = null,
                         List <string> imagesFromScanner           = null)
        {
            if (imagesFromScanner == null)
            {
                imagesFromScanner = new List <string>();
            }
            SelectDevice();

            if (SelectedDevice == null)
            {
                return;
            }


            bool hasMorePages = true;


            // select the correct scanner using the provided scannerId parameter
            WIA.DeviceManager manager = new WIA.DeviceManager();
            WIA.Device        device  = null;
            try
            {
                if (manager.DeviceInfos == null || manager.DeviceInfos.Count < 1)
                {
                    throw new WiaScannerDeviceNotFoundException((string)Application.Current.FindResource("NemaDostupnihSkeneraUzvicnik"));
                }

                foreach (WIA.DeviceInfo info in manager.DeviceInfos)
                {
                    if (info.DeviceID == SelectedDevice.DeviceID)
                    {
                        // connect to scanner
                        device = info.Connect();
                        break;
                    }
                }

                if (handlingType == WiaDocumentHandlingType.Feeder)
                {
                    if (duplexOrOtherMode != null)
                    {
                        SetProperty(device.Properties, (uint)WiaProperty.DocumentHandlingSelect, (uint)(handlingType | duplexOrOtherMode));
                    }
                    else
                    {
                        SetProperty(device.Properties, (uint)WiaProperty.DocumentHandlingSelect, (uint)handlingType);
                    }
                }
            }
            catch (Exception ex)
            {
                device = null;
            }

            while (hasMorePages)
            {
                // device was not found
                if (device == null)
                {
                    throw new WiaScannerDeviceNotFoundException((string)Application.Current.FindResource("OdabraniSkenerNijeDostupanUzvicnik"));
                }

                WIA.Item item = device.Items[1] as WIA.Item;
                try
                {
                    PreviousPropertyValues.Clear();

                    foreach (var property in PropertyValues)
                    {
                        WIA.Property prop = GetProperty(item.Properties, property.Key);
                        PreviousPropertyValues.Add(property.Key, prop?.get_Value());

                        var supported = prop.SubTypeValues;
                        SetProperty(item.Properties, property.Key, property.Value);
                    }


                    // scan image
                    WIA.ICommonDialog wiaCommonDialog = new WIA.CommonDialog();


                    WIA.ImageFile image = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatBMP, true);

                    WIA.ImageFile duplexImage = null;
                    if (duplexOrOtherMode == WiaDocumentHandlingType.Duplex)
                    {
                        Thread.Sleep(100);
                        duplexImage = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatBMP, true);
                    }
                    // save to temp file
                    string fileName = Path.GetTempFileName();
                    if (image != null)
                    {
                        File.Delete(fileName);
                        image.SaveFile(fileName);
                        Marshal.FinalReleaseComObject(image);
                        image = null;
                        // add file to output list
                        imagesFromScanner.Add(fileName);
                    }
                    if (duplexImage != null)
                    {
                        string duplexFileName = Path.GetTempFileName();
                        File.Delete(duplexFileName);
                        duplexImage.SaveFile(duplexFileName);
                        Marshal.FinalReleaseComObject(duplexImage);
                        duplexImage = null;
                        // add file to output list
                        imagesFromScanner.Add(duplexFileName);
                    }


                    item = null;

                    WIA.Property documentHandlingSelect = null;
                    WIA.Property documentHandlingStatus = null;
                    foreach (WIA.Property prop in device.Properties)
                    {
                        if (prop.PropertyID == (uint)WiaProperty.DocumentHandlingSelect)
                        {
                            documentHandlingSelect = prop;
                        }
                        if (prop.PropertyID == (uint)WiaProperty.DocumentHandlingStatus)
                        {
                            documentHandlingStatus = prop;
                        }
                    }
                    hasMorePages = false;

                    if (documentHandlingSelect != null)
                    {
                        var propId            = documentHandlingSelect.PropertyID;
                        var propValue         = documentHandlingSelect.get_Value();
                        var propValueBitCheck = (propValue & ((uint)WiaDocumentHandlingType.Feeder));
                        if (propValueBitCheck != 0)
                        {
                            var statusId            = documentHandlingStatus.PropertyID;
                            var statusValue         = documentHandlingStatus.get_Value();
                            var statusValueBitCheck = (statusValue & WIA_DPS_DOCUMENT_HANDLING_STATUS.FEED_READY);
                            hasMorePages = (statusValueBitCheck != 0);
                        }
                    }


                    //Thread.Sleep(500);
                }
                catch (WiaScannerDeviceNotFoundException exc)
                {
                    throw exc;
                }
                catch (IOException exc)
                {
                    throw exc;
                }
                catch (COMException exc)
                {
                    if (imagesFromScanner?.Count() < 1)
                    {
                        if ((uint)exc.ErrorCode == 0x80210003)
                        {
                            throw new WiaScannerInsertPaperException(exc.Message);
                        }
                        else
                        {
                            throw exc;
                        }
                    }
                    else // U slucaju da su pokupljene slike, kad dodje do poruke o poslednjoj skeniranoj prekidamo izvrsavanje
                    {
                        return;
                    }
                }
                catch (Exception exc)
                {
                    throw exc;
                }
            }
        }
        /// <summary>
        /// Start scan
        /// </summary>
        public void ScanAsync(ScannerInfo source)
        {
            if (source == null)
            {
                return;
            }

            WIA.Device wiaDevice = source.GetDevice();
            // Manager
            WIA.DeviceManager wiaManager = new WIA.DeviceManager();

            bool hasMorePages = true;

            while (hasMorePages)
            {
                try
                {
                    // Get items
                    WIA.Item wiaItem = wiaDevice.Items[1];
                    int      inColor = 1;
                    int      dpi     = 300;
                    wiaItem.Properties["6146"].set_Value((int)inColor);//Item MUST be stored in a variable THEN the properties must be set.
                    wiaItem.Properties["6147"].set_Value(dpi);
                    wiaItem.Properties["6148"].set_Value(dpi);

                    //var imageFile = (ImageFile)(new CommonDialog()).ShowTransfer(wiaItem, "{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}", false); //wiaItem.Transfer("{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}") as WIA.ImageFile;

                    //var imageFile = wiaItem.Transfer("{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}") as WIA.ImageFile;
                    var imageFile = wiaItem.Transfer("{b96b3cab-0728-11d3-9d7b-0000f81ef32e}") as WIA.ImageFile;


                    if (this.ScanCompleted != null)
                    {
                        this.ScanCompleted(this, new ScanCompletedEventArgs(imageFile.FileData.get_BinaryData()));
                    }
                }
                catch (Exception)
                {
                    break;
                }
                finally
                {
                    //determine if there are any more pages waiting
                    WIA.Property documentHandlingSelect = null;
                    WIA.Property documentHandlingStatus = null;

                    foreach (WIA.Property prop in wiaDevice.Properties)
                    {
                        if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT)
                        {
                            documentHandlingSelect = prop;
                        }
                        if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_STATUS)
                        {
                            documentHandlingStatus = prop;
                        }
                    }
                    hasMorePages = false; //assume there are no more pages
                    if (documentHandlingSelect != null)
                    //may not exist on flatbed scanner but required for feeder
                    {
                        //check for document feeder
                        if ((Convert.ToUInt32(documentHandlingSelect.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_SELECT.FEEDER) != 0)
                        {
                            hasMorePages = ((Convert.ToUInt32(documentHandlingStatus.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_STATUS.FEED_READY) != 0);
                        }
                    }

                    if (hasMorePages && this.SingleOnly)
                    {
                        hasMorePages = false;
                    }
                }
            }
        }
Esempio n. 11
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        public static List <Image> Scan(string scannerName)
        {
            List <Image> images       = new List <Image>();
            bool         hasMorePages = true;
            bool         paperEmpty   = false;

            while (hasMorePages)
            {
                Dictionary <string, string> devices = WiaScanner.GetDevices();
                var scannerId             = devices.FirstOrDefault(x => x.Value == scannerName).Key;
                WIA.DeviceManager manager = new WIA.DeviceManager();
                WIA.Device        device  = null;
                // select the correct scanner using the provided scannerId parameter
                foreach (WIA.DeviceInfo info in manager.DeviceInfos)
                {
                    if (info.DeviceID == scannerId && info.Type == WIA.WiaDeviceType.ScannerDeviceType)
                    {
                        // connect to scanner
                        device = info.Connect();
                        break;
                    }
                }

                // device was not found
                if (device == null)
                {
                    // enumerate available devices
                    string availableDevices = "";
                    foreach (var d in devices)
                    {
                        availableDevices += d.Value + "\n";
                    }

                    // show error with available devices
                    throw new Exception("The device with provided ID could not be found. Available Devices:\n" + availableDevices);
                }

                WIA.Item item = SetPaperSetting(device);

                try
                {
                    // scan image
                    WIA.ICommonDialog wiaCommonDialog = new WIA.CommonDialog();
                    WIA.ImageFile     image           = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatJPEG, true);

                    //WIA.ImageProcess imp = new WIA.ImageProcess();  // use to compress jpeg.
                    //imp.Filters.Add(imp.FilterInfos["Convert"].FilterID);
                    ////imp.Filters[1].Properties["FormatID"].set_Value(wiaFormatJPEG);
                    //imp.Filters[1].Properties["FormatID"].set_Value(wiaFormatJPEG);
                    //imp.Filters[1].Properties["Quality"].set_Value(80); // 1 = low quality, 100 = best
                    //image = imp.Apply(image);  // apply the filters

                    // get a tempfile path
                    string fileName = Path.GetTempFileName();
                    // delete any existing file first
                    File.Delete(fileName);
                    // save to temp file
                    image.SaveFile(fileName);
                    // make the original (wia) image null
                    image = null;
                    // get system.drawing image from temporary file and add file to output list
                    images.Add(Image.FromFile(fileName, true));

                    //var imageBytes = (byte[])image.FileData.get_BinaryData();
                    //var stream = new MemoryStream(imageBytes);
                    //images.Add(Image.FromStream(stream));
                }
                catch (System.Runtime.InteropServices.COMException cx)
                {
                    string ex           = string.Empty;
                    int    comErrorCode = GetWIAErrorCode(cx);
                    if (comErrorCode > 0)
                    {
                        ex = GetErrorCodeDescription(comErrorCode);
                    }
                    if (comErrorCode == 3 && images.Count == 0)
                    {
                        throw new Exception(ex);
                    }
                    else if (comErrorCode == 3 && images.Count > 0)
                    {
                        paperEmpty = true;
                    }
                }

                finally
                {
                    item = null;
                    // assume there are no more pages
                    hasMorePages = false;
                    if (!paperEmpty)
                    {
                        //determine if there are any more pages waiting
                        WIA.Property documentHandlingSelect = null;
                        WIA.Property documentHandlingStatus = null;

                        foreach (WIA.Property prop in device.Properties)
                        {
                            if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT)
                            {
                                documentHandlingSelect = prop;
                            }

                            if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_STATUS)
                            {
                                documentHandlingStatus = prop;
                            }
                        }

                        // may not exist on flatbed scanner but required for feeder
                        if (documentHandlingSelect != null)
                        {
                            // check for document feeder
                            if ((Convert.ToUInt32(documentHandlingSelect.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_SELECT.FEEDER) != 0)
                            {
                                hasMorePages = ((Convert.ToUInt32(documentHandlingStatus.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_STATUS.FEED_READY) != 0);
                            }
                        }
                    }
                }
            }
            return(images);
        }
Esempio n. 12
0
        private static WIA.Item SetPaperSetting(WIA.Device device)
        {
            WIA.Item item   = device.Items[1] as WIA.Item;
            double   width  = 8.5; //8.5 inches
            double   height = 11;  //11 inches
            //int dpi = Avari_Receiving.Properties.Settings.Default.ScannerDPI;
            int dpi = Skanny.Properties.Settings.Default.ScannerDPI;

            switch (Skanny.Properties.Settings.Default.ScannerColorFormat)
            {
            case (int)ColorFormats.BlackandWhiteOnly:
                try
                {
                    item.Properties["6146"].set_Value(4); //b&w
                }
                catch (Exception)
                {
                }
                break;

            case (int)ColorFormats.Grayscale:
                try
                {
                    item.Properties["6146"].set_Value(2); //grayscale
                }
                catch (Exception)
                {
                }
                break;

            case (int)ColorFormats.Color:
                try
                {
                    item.Properties["6146"].set_Value(1); //color
                }
                catch (Exception)
                {
                }
                try
                {
                    item.Properties["4104"].set_Value(24); //color depth - read only on some scanners. catch exception if so.
                }
                catch (Exception)
                {
                }
                break;

            default:
                try
                {
                    item.Properties["6146"].set_Value(2); //grayscale
                }
                catch (Exception)
                {
                }
                break;
            }
            item.Properties["6147"].set_Value(dpi);
            item.Properties["6148"].set_Value(dpi);
            item.Properties["6151"].set_Value((int)(dpi * width));
            item.Properties["6152"].set_Value((int)(dpi * height));
            return(item);
        }
Esempio n. 13
0
        private void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                // parametros de scanner
                int resolucion  = 150;
                int anchoImagen = 1200;
                int altoImagen  = 1500;
                int modoColor   = 1;

                // la mas importante
                bool HayMasPaginas = true; // tiene mas paginas :)

                // ruta principal donde se guardan los archivos
                string rutaBase = string.Format("{0}\\{1}", Application.StartupPath, DateTime.Now.ToString("yyyMMddhhmmss"));

                Directory.CreateDirectory(rutaBase);

                // elegir escanner
                WIA.CommonDialog dialogoSeleccionaEscanner = new WIA.CommonDialog();
                WIA.Device       escaner = dialogoSeleccionaEscanner.ShowSelectDevice(WIA.WiaDeviceType.ScannerDeviceType, true, false);

                if (escaner != null)
                {
                    idEscaner = escaner.DeviceID;
                }
                else
                {
                    MessageBox.Show("No se eligió Escaner");
                    return;
                }

                int x             = 0;
                int numeroPaginas = 0;

                while (HayMasPaginas)
                {
                    // mientras la bandera de mas paginas este activa
                    // conectar escaner
                    // mostrando avance de escaneo
                    WIA.CommonDialog  dialogoEscaneo = new WIA.CommonDialogClass();
                    WIA.DeviceManager manager        = new WIA.DeviceManagerClass();
                    WIA.Device        dispoWIA       = null;

                    // cargando el dispositivo
                    foreach (WIA.DeviceInfo scannerInfo in manager.DeviceInfos)
                    {
                        if (scannerInfo.DeviceID == idEscaner)
                        {
                            WIA.Properties infoprop = null;
                            infoprop = scannerInfo.Properties;

                            dispoWIA = scannerInfo.Connect();

                            break;
                        }
                    }

                    // inicia escaneo
                    WIA.ImageFile imgEscaneo  = null;
                    WIA.Item      escanerItem = dispoWIA.Items[1] as WIA.Item;

                    AdjustScannerSettings(escanerItem, resolucion, 0, 0, anchoImagen, altoImagen, 0, 0, modoColor);

                    // tomando la imagen
                    imgEscaneo = (WIA.ImageFile)dialogoEscaneo.ShowTransfer(escanerItem, WIA.FormatID.wiaFormatPNG, false);

                    string RutaNombreEscaneo = String.Format("{0}\\{1}.png", rutaBase, x.ToString());

                    if (File.Exists(RutaNombreEscaneo))
                    {
                        //file exists, delete it
                        File.Delete(RutaNombreEscaneo);
                    }

                    imgEscaneo.SaveFile(RutaNombreEscaneo);
                    numeroPaginas++;
                    x++;
                    imgEscaneo = null;

                    // preguntar si hay mas documentos pendientes de escaneo
                    if (MessageBox.Show("¿Deseas escanear otro documento?. Antes de seleccionar 'Yes' Por favor introduzca el documento a escanear.", "Escaner", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
                    {
                        HayMasPaginas = false;
                    }
                }

                // una vez escaneado los dosucmentos, se hace un pdf con ellos para despues hacerlo zip
                // rutaBase es el nombre de la variable de la carpeta
                MessageBox.Show("Escaneo finalizado. Armando archivo pdf");
                string nombreArchivoPdf = string.Format("{0}\\{1}.pdf", rutaBase, DateTime.Now.ToString("yyyMMddhhmmss"));

                Document  pdfDoc = new Document(PageSize.LETTER, 2, 2, 2, 2);
                PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream(nombreArchivoPdf, FileMode.CreateNew));

                pdfDoc.Open();

                // tomar las imagenes del escaneo
                for (int i = 0; i < x; i++)
                {
                    // tomar la imagen
                    string rutaImagen = String.Format("{0}\\{1}.png", rutaBase, i.ToString());

                    PdfContentByte cb = writer.DirectContent;

                    using (FileStream fsSource = new FileStream(rutaImagen, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                    {
                        Image img = Image.GetInstance(fsSource);
                        img.ScaleToFit(pdfDoc.PageSize.Width, pdfDoc.PageSize.Height);
                        pdfDoc.Add(img);
                    }
                }

                pdfDoc.Close();

                MessageBox.Show("Archivo pdf generado. Generando archivo zip");

                // comprimir
                FileInfo        pdfFileInfo      = new FileInfo(nombreArchivoPdf);
                string          nombreArchivoZip = string.Format("{0}\\{1}.zip", rutaBase, DateTime.Now.ToString("yyyMMddhhmmss"));
                ZipOutputStream zipStream        = new ZipOutputStream(File.Create(nombreArchivoZip));
                zipStream.SetLevel(6);

                // abrir el archivo para escribirlo
                FileStream pdfFile = File.OpenRead(nombreArchivoPdf);
                byte[]     buffer  = new byte[pdfFile.Length];
                pdfFile.Read(buffer, 0, buffer.Length);

                // agregando el archivo a la carpeta comprimida
                ZipEntry entry = new ZipEntry(Path.GetFileName(nombreArchivoPdf))
                {
                    DateTime = pdfFileInfo.LastWriteTime,
                    Size     = pdfFile.Length
                };

                pdfFile.Close();

                Crc32 objCrc32 = new Crc32();
                objCrc32.Reset();
                objCrc32.Update(buffer);

                entry.Crc = objCrc32.Value;
                zipStream.PutNextEntry(entry);
                zipStream.Write(buffer, 0, buffer.Length);

                zipStream.Finish();
                zipStream.Close();

                MessageBox.Show("Archivo zip generado. Enviando archivo por FTP");

                // enviar el documento en ftp

                MessageBox.Show("proceso completo.");
            }
            catch (Exception ex)
            {
                // cachando errores com
                if (ex is COMException)
                {
                    // Convert the error code to UINT
                    uint errorCode = (uint)((COMException)ex).ErrorCode;

                    // See the error codes
                    if (errorCode == 0x80210006)
                    {
                        MessageBox.Show("The scanner is busy or isn't ready");
                    }
                    else if (errorCode == 0x80210064)
                    {
                        MessageBox.Show("The scanning process has been cancelled.");
                    }
                    else if (errorCode == 0x8021000C)
                    {
                        MessageBox.Show("There is an incorrect setting on the WIA device.");
                    }
                    else if (errorCode == 0x80210005)
                    {
                        MessageBox.Show("The device is offline. Make sure the device is powered on and connected to the PC.");
                    }
                    else if (errorCode == 0x80210001)
                    {
                        MessageBox.Show("An unknown error has occurred with the WIA device.");
                    }
                }
                else
                {
                    MessageBox.Show("Error " + ex.Message);
                }
            }
        }