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

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

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

/// <summary>
/// Acquires images from the automatic document feeder (ADF) of eSCL device.
/// </summary>
public void AcquireImagesFromDocumentFeederOfEsclDevice()
{
    // create eSCL device manager
    using (Vintasoft.EsclImageScanning.EsclDeviceManager deviceManager = new Vintasoft.EsclImageScanning.EsclDeviceManager())
    {
        // open eSCL device manager
        deviceManager.Open();

        // wait while the eSCL device manager searches for eSCL devices
        System.Threading.Thread.Sleep(deviceManager.DeviceSearchTimeout);
        // get count of eSCL devices
        int deviceCount = deviceManager.Devices.Count;
        if (deviceCount == 0)
        {
            System.Console.WriteLine("Devices are not found.");
            return;
        }

        // select the first eSCL device
        Vintasoft.EsclImageScanning.EsclDevice device = deviceManager.Devices[0];

        // open eSCL 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.EsclImageScanning.EsclAcquiredImage acquiredImage;
        do
        {
            try
            {
                // acquire image from eSCL 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 eSCL device
        device.Close();

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

    System.Console.ReadLine();
}

VB.NET

''' <summary>
''' Acquires images from the automatic document feeder (ADF) of eSCL device.
''' </summary>
Public Sub AcquireImagesFromDocumentFeederOfEsclDevice()
    ' create eSCL device manager
    Using deviceManager As New Vintasoft.EsclImageScanning.EsclDeviceManager()
        ' open eSCL device manager
        deviceManager.Open()

        ' wait while the eSCL device manager searches for eSCL devices
        System.Threading.Thread.Sleep(deviceManager.DeviceSearchTimeout)
        ' get count of eSCL 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 eSCL device
        Dim device As Vintasoft.EsclImageScanning.EsclDevice = deviceManager.Devices(0)

        ' open eSCL 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.EsclImageScanning.EsclAcquiredImage
        Do
            Try
                ' acquire image from eSCL 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 eSCL device
        device.Close()

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

    System.Console.ReadLine()
End Sub

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