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Form1.cs
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Form1.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using WIA;
namespace ScannerDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
ListScanners();
// Set start output folder TMP
textBox1.Text = Path.GetTempPath();
// Set JPEG as default
comboBox1.SelectedIndex = 1;
}
private void ListScanners()
{
// Clear the ListBox.
listBox1.Items.Clear();
// Create a DeviceManager instance
var deviceManager = new DeviceManager();
// Loop through the list of devices and add the name to the listbox
for (int i = 1; i <= deviceManager.DeviceInfos.Count; i++)
{
// Add the device only if it's a scanner
if (deviceManager.DeviceInfos[i].Type != WiaDeviceType.ScannerDeviceType)
{
continue;
}
// Add the Scanner device to the listbox (the entire DeviceInfos object)
// Important: we store an object of type scanner (which ToString method returns the name of the scanner)
listBox1.Items.Add(
new Scanner(deviceManager.DeviceInfos[i])
);
}
}
private void button1_Click(object sender, EventArgs e)
{
Task.Factory.StartNew(StartScanning).ContinueWith(result => TriggerScan());
}
private void TriggerScan()
{
Console.WriteLine("Image succesfully scanned");
}
public void StartScanning()
{
Scanner device = null;
this.Invoke(new MethodInvoker(delegate ()
{
device = listBox1.SelectedItem as Scanner;
}));
if (device == null)
{
MessageBox.Show("You need to select first an scanner device from the list",
"Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}else if(String.IsNullOrEmpty(textBox2.Text))
{
MessageBox.Show("Provide a filename",
"Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
ImageFile image = new ImageFile();
string imageExtension = "";
this.Invoke(new MethodInvoker(delegate ()
{
switch (comboBox1.SelectedIndex)
{
case 0:
image = device.ScanImage(WIA.FormatID.wiaFormatPNG);
imageExtension = ".png";
break;
case 1:
image = device.ScanImage(WIA.FormatID.wiaFormatJPEG);
imageExtension = ".jpeg";
break;
case 2:
image = device.ScanImage(WIA.FormatID.wiaFormatBMP);
imageExtension = ".bmp";
break;
case 3:
image = device.ScanImage(WIA.FormatID.wiaFormatGIF);
imageExtension = ".gif";
break;
case 4:
image = device.ScanImage(WIA.FormatID.wiaFormatTIFF);
imageExtension = ".tiff";
break;
}
}));
// Save the image
var path = Path.Combine(textBox1.Text, textBox2.Text + imageExtension);
if (File.Exists(path))
{
File.Delete(path);
}
image.SaveFile(path);
pictureBox1.Image = new Bitmap(path);
}
private void button2_Click(object sender, EventArgs e)
{
FolderBrowserDialog folderDlg = new FolderBrowserDialog();
folderDlg.ShowNewFolderButton = true;
DialogResult result = folderDlg.ShowDialog();
if (result == DialogResult.OK)
{
textBox1.Text = folderDlg.SelectedPath;
}
}
}
}