How to acquire images from scanner,camera (or another TWAIN or WIA compatible device) with Bytescout Scan SDK for .NET in Visual C#

This sample code demonstrates how to get images from a scanner or a web-camera or any other TWAIN and WIA compatible device using Bytescout Scan SDK for .NET and Visual C#.

Full sample code is included into the SDK.

Screenshot of C# test application:

using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;

using Bytescout.Scan;
using System.IO;

namespace Test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

// Synchronous scan – temporary unavailable

private void btnScanToImages_Click(object sender, EventArgs e)
{
//Scan scan = new Scan();
//ArrayList images = scan.AcquireImages(this.Handle);
//FillTabsWithImages(images);

}

// Starts Asynchronous scan into images. When scan is finished then scan_TransferFinished event is called and array with images objects is passed into this event
private void btnScanToImagesAsync_Click(object sender, EventArgs e)
{
// create new Scan object
Scan scan = new Scan();

// set Scan object to save images into images array (will be passed as a paramtere in scan_TransferFinished event

scan.SaveTo = SaveTo.ImageObject;

// set function for scan finished event to indicate when image transfer is finished
scan.TransferFinished += new TransferFinishedEventHandler(scan_TransferFinished); // see scan_TransferFinished event below

// acquire images
scan.AcquireImagesAsync(this.Handle);
}

// this event captures scanned images and fills images into tabs

// you can also iterate through scannedImages array to get each image as an Image object instead
void scan_TransferFinished(Scan sender, ArrayList scannedImages)
{
FillTabsWithImages(scannedImages);
}

// this function puts retrieved images objects into tabs on the form
private void FillTabsWithImages(ArrayList images)
{
tabControl1.TabPages.Clear();

for (int i = 0; i < images.Count; i++) { TabPage page = new TabPage(); PictureBox pb = new PictureBox(); pb.Dock = DockStyle.Fill; pb.SizeMode = PictureBoxSizeMode.Zoom; if (images[i] is Image) { page.Text = "Image " + (i + 1).ToString(); pb.Image = (Image) images[i]; } else { page.Text = (String) images[i]; pb.Image = Image.FromFile((String) images[i]); } page.Controls.Add(pb); tabControl1.TabPages.Add(page); } } // acquire images into files automatically saved into the given folder with given image format and filename private void btnScanToFilesAsync_Click(object sender, EventArgs e) { // create new Scan object Scan scan = new Scan(); // set SDK to save images into files scan.SaveTo = SaveTo.File; // scan.FileNamingTemplate = "ScannedImage_{0:D2}"; // you can set output filename template // set output format as JPG image format scan.OutputFormat = OutputFormat.JPEG; // you can set output folder as well, by default output folder is the same where executable .exe is running //scan.OutputFolder = Path.GetTempPath(); // assign the event to indicate when image transfer is finished scan.TransferFinished += new TransferFinishedEventHandler(scan_TransferFinished); // acquire images scan.AcquireImagesAsync(this.Handle); } // displays ready-to-use options dialog for the scan SDK private void btnOptions_Click(object sender, EventArgs e) { Scan.ShowOptionsDialog(new Scan()); } } } [/vb]