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Integrate image scanning within a C# application: Part VI

Posted by Bechir Bejaoui Articles | COM Interop November 07, 2008
In this tutorial, I will show a very simple trick of how to integrate the functionality of scanning your documentation with a numeric scanner in your C# application.
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Walkthrough

You have to know that this kind of operation is only leveraged within windows XP environment, moreover, the WIA API is not automatically delivered with Windows; therefore, it must be downloaded from this link.

http://www.microsoft.com/downloads/details.aspx?FamilyID=a332a77a-01b8-4de6-91c2-b7ea32537e29&displaylang=en

First, install the WIA API by extracting the content of the zipped file then by copying and pasting the wiaaut.dll assembly to C:\Windows\System32 and finally by registering the assembly using the regsvc32.exe



Figure 1.

Now, include the WIA library within your project by adding a reference to it :



Figure 2.

Add a new class to your project and name it Scanner:

using System;
using WIA;

namespace ScanImage
{
    public class Scanner
    {
        Device oDevice;
        Item oItem;
        CommonDialogClass dlg;
        public Scanner()
        {
         dlg = new CommonDialogClass();
         oDevice = dlg.ShowSelectDevice(WiaDeviceType.ScannerDeviceType, true, false);
        }
        public void Scann()
        {
            dlg.ShowAcquisitionWizard(oDevice);
        }
    }
}

In order to consume the services of this very simple class add a button and a picture box to your form as your project is Windows form one, the form should looks like this bellow:



Figure 3.

Do implement the button1_click as follow:

private void button1_Click(object sender, EventArgs e)
{
    Scanner oScanner = new Scanner();
    oScanner.Scann();
    button1.Text = "Image scanned";
    OpenFileDialog dlg = new OpenFileDialog();
    if (dlg.ShowDialog() == DialogResult.OK)
    {
       pictureBox1.Image = Image.FromFile(dlg.FileName);
    }
}

Now run the application and observe:

Figure 4.

Click OK



Figure 5.

Then the below windows appears :



Figure 6.

Choose the colored photo, and then click next:



Figure 7.

In the above window, select JPG then click next

Figure 8 .

As showed above, the scanning process will be lunched as normally, click next then finish and the paper will be scanned as bellow:

Figure 9

You can browse to the emplacement of the given scanned image and display it using the picture box.

Figure 10

That's it

God Dotneting !!!
 

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