TWAIN devices

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TWAIN device manager allows to show standard device selection dialog. Standard device selection dialog allows to view device list and select the default device. Standard device selection dialog can be shown using the DeviceManager.ShowDefaultDeviceSelectionDialog method.

Here is an example that demonstrates how to show standard TWAIN device selection dialog:

VB.NET

' The project, which uses this code, must have references to the following assemblies:
' - Vintasoft.Twain

''' <summary>
''' Shows standard TWAIN device selection dialog.
''' </summary>
Private Sub ShowDeviceSelectionDialog()
    ' create device manager
    Using deviceManager As New Vintasoft.Twain.DeviceManager()
        ' open device manager
        deviceManager.Open()

        ' show standard TWAIN device selection dialog
        deviceManager.ShowDefaultDeviceSelectionDialog()
    End Using
End Sub

// The project, which uses this code, must have references to the following assemblies:
// - Vintasoft.Twain

/// <summary>
/// Shows standard TWAIN device selection dialog.
/// </summary>
void ShowDeviceSelectionDialog()
{
    // create device manager
    using (Vintasoft.Twain.DeviceManager deviceManager = new Vintasoft.Twain.DeviceManager())
    {
        // open device manager
        deviceManager.Open();

        // show standard TWAIN device selection dialog
        deviceManager.ShowDefaultDeviceSelectionDialog();
    }
}

Moreover TWAIN device manager allows to get device list programmatically. Device list can be get using the DeviceManager.Devices property. Information about the default device can be get using the DeviceManager.DefaultDevice property. Information about opened device can be get using the DeviceManager.OpenedDevice property.

Here is an example that demonstrates how to get information about all devices installed in the system:

VB.NET

' The project, which uses this code, must have references to the following assemblies:
' - Vintasoft.Twain

''' <summary>
''' Gets information about all devices installed in the system.
''' </summary>
Private Sub GetDevicesInfo()
    ' create device manager
    Using deviceManager As New Vintasoft.Twain.DeviceManager()
        ' open device manager
        deviceManager.Open()

        Dim devices As Vintasoft.Twain.DeviceCollection = deviceManager.Devices
        ' for each device
        For i As Integer = 0 To devices.Count - 1
            ' output the device name
            Console.WriteLine(String.Format("Device '{0}'", devices(i).Info.ProductName))
        Next
    End Using
End Sub

// The project, which uses this code, must have references to the following assemblies:
// - Vintasoft.Twain

/// <summary>
/// Gets information about all devices installed in the system.
/// </summary>
void GetDevicesInfo()
{
    // create device manager
    using (Vintasoft.Twain.DeviceManager deviceManager = new Vintasoft.Twain.DeviceManager())
    {
        // open device manager
        deviceManager.Open();

        Vintasoft.Twain.DeviceCollection devices = deviceManager.Devices;
        // for each device
        for (int i = 0; i < devices.Count; i++)
        {
            // output the device name
            System.Console.WriteLine(string.Format("Device '{0}'", devices[i].Info.ProductName));
        }
    }
}

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