continous scanning in windows forms

Question

i want to add a device property to continously scan papers using scanjet pro f1 in c# windows forms, only this device.Properties["3088"].set_Value(5); // 5 = duplex (front back) is working but the continous scan, please hel

Abhishek Yadav · Answer

To continuously scan documents using the ScanJet Pro F1 in a C# Windows Forms application, you'll need to set up a loop that continuously retrieves and processes scans. Below is a simplified example of how to accomplish this, along with the configuration for duplex scanning. Prerequisites Ensure you have the necessary drivers installed for the ScanJet Pro F1. Include references to the appropriate imaging libraries, like WIA (Windows Image Acquisition) or TWAIN. Sample Code Here's a basic example using WIA: using System; using System.Windows.Forms; using WIA; namespace ContinuousScanningApp { public partial class MainForm : Form { private Device scanner; private bool isScanning; public MainForm() { InitializeComponent(); InitializeScanner(); } private void InitializeScanner() { var wia = new WIA.ImageFile(); var deviceManager = new DeviceManager(); // Select the desired scanner foreach (DeviceInfo deviceInfo in deviceManager.DeviceInfos) { if (deviceInfo.Type == WIA.WiaDeviceType.ScannerDeviceType) { scanner = deviceInfo.Connect(); break; } } if (scanner != null) { // Set duplex mode scanner.Properties["3088"].set_Value(5); // 5 = duplex } else { MessageBox.Show("Scanner not found."); } } private void StartScanningButton_Click(object sender, EventArgs e) { isScanning = true; ContinuousScan(); } private void StopScanningButton_Click(object sender, EventArgs e) { isScanning = false; } private void ContinuousScan() { while (isScanning) { try { // Acquire an image from the scanner ImageFile image = (ImageFile)scanner.Transfer(FormatID.wiaFormatJPEG); // Process the scanned image (save/display) ProcessImage(image); } catch (Exception ex) { MessageBox.Show($"Error during scanning: {ex.Message}"); break; } } } private void ProcessImage(ImageFile image) { // Save the image or display it string filePath = $"C:\ScannedImages\scan_{DateTime.Now:yyyyMMdd_HHmmss}.jpg"; image.SaveFile(filePath); } } }

Stein Makhambera · Answer

thanks for the reply Abhishek Yadav, now continous scanning is working but it is resting in between scans, i want to scan one after another without resting until the feeder is empty and if i run with this line of code // Enable continuous scanning device.Properties["3104"].set_Value(1); it is showing error >>E_ACCESSDENIED help me to fix it.