Как сканировать страницы из устройства автоматической подачи документов сканера WIA?

В этом разделе

Если вы хотите сканировать страницы из устройства автоматической подачи документов (АПД) сканера WIA, вам следует проверить наличие АПД с помощью свойства WiaDevice.HasFeeder и включить устройства автоматический подачи документов с помощью свойства WiaDevice.IsFeederEnabled.

Ниже приведен пример, демонстрирующий получение изображений из устройства автоматической подачи документов устройства WIA:

/// <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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