SetValue(Boolean) Method

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Sub SetValue( _
   ByVal value As Boolean _
)

'Usage
 
Dim instance As DeviceCapability
Dim value As Boolean
 
instance.SetValue(value)

public void SetValue( 
   bool value
)

public: void SetValue( 
   bool value
)

public:
void SetValue( 
   bool value
)

Parameters

value: New current value of device capability.

Exception	Description
TwainInvalidStateException	Thrown if device is in wrong state.
TwainDeviceCapabilityException	Thrown if error occurs during setting value of capability.
DebuggerException	Thrown if the .NET debugger is used and the function evaluation requires all threads to run.

This example shows how to enable duplex using capability of device. Thrown if the .NET debugger is used and the function evaluation requires all threads to run.

VB.NET

Private Shared Sub SetDuplexEnabledCapValue()
    Using deviceManager1 As New DeviceManager()
        ' open the device manager
        deviceManager1.Open()
            
        ' get reference to the default device
        Dim device As Device = deviceManager1.DefaultDevice
            
        ' open the device
        device.Open()
            
        ' get reference to object that manipulates DuplexEnabled capability
        Dim duplexEnabledCap As DeviceCapability = device.Capabilities.Find(DeviceCapabilityId.DuplexEnabled)
        ' if DuplexEnabled capability supported
        If duplexEnabledCap IsNot Nothing Then
            ' set value of DuplexEnabled capability
            duplexEnabledCap.SetValue(True)
        End If
            
        ' close the device
        device.Close()
            
        ' close the device manager
        deviceManager1.Close()
    End Using
End Sub

C#

private static void SetDuplexEnabledCapValue()
{
    using (DeviceManager deviceManager1 = new DeviceManager())
    {
        // open the device manager
        deviceManager1.Open();
            
        // get reference to the default device
        Device device = deviceManager1.DefaultDevice;
            
        // open the device
        device.Open();
            
        // get reference to object that manipulates DuplexEnabled capability
        DeviceCapability duplexEnabledCap = device.Capabilities.Find(DeviceCapabilityId.DuplexEnabled);
        // if DuplexEnabled capability supported
        if (duplexEnabledCap != null)
        {
            // set value of DuplexEnabled capability
            duplexEnabledCap.SetValue(true);
        }
            
        // close the device
        device.Close();
            
        // close the device manager
        deviceManager1.Close();
    }
}

Target Platforms: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2016, Windows Server 2012, Windows Server 2008, Windows Server 2003

Reference

DeviceCapability Class
DeviceCapability Members
Overload List