LightPath Property (Device)

In This Topic

Determines that the image was captured transmissively or reflectively.

Syntax

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

'Declaration

Public Property LightPath As LightPath

public LightPath LightPath { get; set; }

public: __property LightPath get_LightPath();
public: __property void set_LightPath(
   LightPath value
);

public:
property LightPath LightPath {
   LightPath get();
   void set(LightPath value);
}

Exceptions

Exception	Description
TwainInvalidStateException	Thrown if device is in wrong state.
TwainDeviceCapabilityException	Thrown if device does not support capability.
DebuggerException	Thrown if the .NET debugger is used and the function evaluation requires all threads to run.

Remarks

Call this property only when device is opened (State == DeviceState.Opened).

Supported pixel types can be received by the GetSupportedLightPaths method.

Example

This C#/VB.NET code shows how to scan negatives using a scanner.

VB.NET


Public Sub ScanColorImageWithLightPath(device As Vintasoft.Twain.Device)
        device.ShowUI = False
        device.DisableAfterAcquire = True

        device.Open()
        device.PixelType = Vintasoft.Twain.PixelType.RGB
        device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
        device.Resolution = New Vintasoft.Twain.Resolution(300F, 300F)
        device.LightPath = Vintasoft.Twain.LightPath.Transmissive

        device.Acquire()
End Sub


public void ScanColorImageWithLightPath(Vintasoft.Twain.Device device)
{
    device.ShowUI = false;
    device.DisableAfterAcquire = true;

    device.Open();
    device.PixelType = Vintasoft.Twain.PixelType.RGB;
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
    device.Resolution = new Vintasoft.Twain.Resolution(300f, 300f);
    device.LightPath = Vintasoft.Twain.LightPath.Transmissive;

    device.Acquire();
}

Requirements

Target Platforms: .NET 8, .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

Device Class
Device Members

GetSupportedLightPaths
LampState
LightSource
Open

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