How to scan pages from the automatic document feeder (ADF) of WIA scanner?

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If you want to scan pages from the automatic document feeder (ADF) of WIA scanner, you should check if ADF is present using the using WiaDevice.HasFeeder property and enable the ADF using the WiaDevice.IsFeederEnabled property.

Here is an example that demonstrates how to acquire images from automatic document feeder of WIA device:

/// <summary>
/// Acquires images from the automatic document feeder (ADF) of WIA device.
/// </summary>
public void AcquireImagesFromDocumentFeederOfWiaDevice()
{
    // create WIA device manager
    using (Vintasoft.WiaImageScanning.WiaDeviceManager deviceManager = new Vintasoft.WiaImageScanning.WiaDeviceManager())
    {
        // open WIA device manager
        deviceManager.Open();

        // get count of WIA devices
        int deviceCount = deviceManager.Devices.Count;
        if (deviceCount == 0)
        {
            System.Console.WriteLine("Devices are not found.");
            return;
        }

        // select the first WIA device
        Vintasoft.WiaImageScanning.WiaDevice device = deviceManager.Devices[0];

        // open WIA device
        device.Open();

        // if device does not have the automatic document feeder
        if (!device.HasFeeder)
        {
            System.Console.WriteLine("Device does not have the automatic document feeder.");
            return;
        }
        // enable the automatic document feeder
        device.IsFeederEnabled = true;
        // if the automatic document feeder can work in duplex mode
        if (device.HasDuplex)
        {
            // enable the duplex mode for the automatic document feeder
            device.IsDuplexEnabled = true;
        }

        Vintasoft.WiaImageScanning.WiaAcquiredImage acquiredImage;
        do
        {
            try
            {
                // acquire image from WIA device
                acquiredImage = device.AcquireImageSync();
                // if image is received
                if (acquiredImage != null)
                {
                    System.Console.WriteLine("Image is acquired.");
                }
                // if image is not received
                else
                {
                    System.Console.WriteLine("Scan is completed.");
                    break;
                }
            }
            catch (System.Exception ex)
            {
                System.Console.WriteLine(string.Format("Scan is failed: {0}", ex.Message));
                break;
            }
        }
        // while image is acquired
        while (acquiredImage != null);

        // close WIA device
        device.Close();

        // close WIA device manager
        deviceManager.Close();
    }

    System.Console.ReadLine();
}

VB.NET

''' <summary>
''' Acquires images from the automatic document feeder (ADF) of WIA device.
''' </summary>
Public Sub AcquireImagesFromDocumentFeederOfWiaDevice()
    ' create WIA device manager
    Using deviceManager As New Vintasoft.WiaImageScanning.WiaDeviceManager()
        ' open WIA device manager
        deviceManager.Open()

        ' get count of WIA devices
        Dim deviceCount As Integer = deviceManager.Devices.Count
        If deviceCount = 0 Then
            System.Console.WriteLine("Devices are not found.")
            Return
        End If

        ' select the first WIA device
        Dim device As Vintasoft.WiaImageScanning.WiaDevice = deviceManager.Devices(0)

        ' open WIA device
        device.Open()

        ' if device does not have the automatic document feeder
        If device.HasFeeder = False Then
            System.Console.WriteLine("Device does not have the automatic document feeder.")
            Return
        End If
        ' enable the automatic document feeder
        device.IsFeederEnabled = True
        ' if the automatic document feeder can work in duplex mode
        If device.HasDuplex = True Then
            ' enable the duplex mode for the automatic document feeder
            device.IsDuplexEnabled = True
        End If

        Dim acquiredImage As Vintasoft.WiaImageScanning.WiaAcquiredImage
        Do
            Try
                ' acquire image from WIA device
                acquiredImage = device.AcquireImageSync()
                ' if image is received
                If acquiredImage IsNot Nothing Then
                    System.Console.WriteLine("Image is acquired.")
                Else
                    ' if image is not received
                    System.Console.WriteLine("Scan is completed.")
                    Exit Try
                End If
            Catch ex As System.Exception
                System.Console.WriteLine(String.Format("Scan is failed: {0}", ex.Message))
                Exit Try
            End Try
            ' while image is acquired
        Loop While acquiredImage IsNot Nothing

        ' close WIA device
        device.Close()

        ' close WIA device manager
        deviceManager.Close()
    End Using

    System.Console.ReadLine()
End Sub

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