/// <summary> /// Use scanner to scan an image (with user selecting the scanner from a dialog). /// </summary> /// <returns>Scanned images. (Base64 strings)</returns> public static List <string> Scan() { WIA.ICommonDialog dialog = new WIA.CommonDialog(); WIA.Device device = dialog.ShowSelectDevice(WIA.WiaDeviceType.UnspecifiedDeviceType, true, false); ScanSettings settings = new ScanSettings(); settings.DeviceId = device.DeviceID; if (device != null) { return(Scan(settings)); } else { throw new Exception("You must select a device for scanning."); } }
/// <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 <string> Scan(ScanSettings settings) { List <string> images = new List <string>(); 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 == settings.DeviceId) { // 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(); WIAScanner.AdjustScannerSettings(item, settings.WIA_Intent); WIA.ImageFile image = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatBMP, false); var imageBytes = (byte[])image.FileData.get_BinaryData(); images.Add(Convert.ToBase64String(imageBytes)); } 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); }