Device Class Members

In This Topic

The following tables list the members exposed by Device.

Public Properties

	Name	Description
	AcquiredImage	Gets the last acquired image.
	AsyncEventArgs	Gets the object that provides information about async event of device if image acquisition process is synchronous.
	AsyncEvents	Gets or sets an array with asynchronous events which the application wants the device to report.
	AutoBright	Determines that brightness should be automatically detected.
	AutoScan	Gets or sets a value indicating whether the device should capture the number of images indicated by the value of XferCount without waiting for the Application to request the image transfers.
	BarcodeRecognizer	Gets an object that allows to enable barcode recognition in acquired images and get information about recognized barcodes.
	BitDepth	Gets or sets the bit depth of images for current scan session.
	BitDepthReductionMode	Gets or sets the bit depth reduction mode of images for current scan session.
	Brightness	Gets or sets the brightness of gray/palette/color images for current scan session.
	BufferedImageCount	Gets the count of images in the device buffer.
	Cameras	Gets a list of cameras supported by device.
	Capabilities	Gets the collection of the device capabilities.
	CloseAfterModalAcquire	Gets or sets a value indicating whether the device must be closed after modal acquisition of images.
	Contrast	Gets or sets the contrast of gray/palette/color images for current scan session.
	DisableAfterAcquire	Gets or sets a value indicating whether the device must be disabled after acquisition of images.
	DocumentFeeder	Allows to manipulate the document feeder of device.
	EndOfJob	Detects the end of batch job.
	ErrorString	Gets the string that describes the error.
	ExtendedImageInfo	Gets an object that allows to get an extended information about the acquired image.
	FileFormat	Gets or sets the file format for images when File transfer mode is used.
	FileJpegQuality	Gets or sets the JPEG quality for acquired images saved as JPEG files when File transfer mode is used.
	FileName	Gets or sets the path to a file where next acquired image should be saved when File transfer mode is used.
	Halftones	Gets or sets the halftones for bit depth reduction of images for current scan session.
	HasFeeder	Gets or sets a value indicating whether the device has automatic document feeder.
	HasFlatbed	Gets or sets a value indicating whether the device has flatbed.
	ImageAcquiringProgressValue	Gets the progress, in percents, of synchronous image acquisition process.
	ImageCompression	Gets or sets the image compression for images when Memory or File transfer mode is used.
	ImageFilter	Gets or sets the image filter for current scan session.
	ImageLayout	Allows to manipulate the image layout of device.
	Info	Gets the information about device.
	IsAsyncEventsSupported	Gets a value indicating whether the device supports asynchronous events.
	IsDisposed	Gets a value that indicates whether the object is disposed.
	JobControl	Allows multiple jobs in batch mode.
	LampState	Determines that the lamp of device is on.
	LightPath	Determines that the image was captured transmissively or reflectively.
	LightSource	Gets or sets the general color characteristic of the light source for current scan session.
	MaxBatchBuffers	Gets or sets the number of images that the device can buffer when AutoScan is enabled.
	ModalUI	Determines that the User Interface of device should be shown in modal state.
	NoiseFilter	Gets or sets the noise filter for current scan session.
	Online	Gets a value indicating whether the device is powered up and available.
	PageAutoSize	Gets or sets the mode of size detection for current scan session.
	PageOrientation	Gets or sets the orientation of images for current scan session.
	PageSize	Gets or sets the page size for current scan session.
	PixelFlavor	Gets or sets the value of pixel flavor for current scan session.
	PixelType	Gets or sets the pixel type of images for current scan session.
	Resolution	Gets or sets the resolution of images for current scan session.
	ShowIndicators	Determines that progress indicator of scan process should be shown.
	ShowUI	Determines that the User Interface of device should be shown.
	State	Gets the state of device.
	Threshold	Gets or sets the threshold of black-white images for current scan session.
	TransferMode	Gets or sets the transfer mode, which should be used when images are acquiring from TWAIN device. The property also changes value of DeviceCapabilityId.IXferMech capability if device is opened.
	UnitOfMeasure	Gets or sets the unit of measure for current scan session.
	WorkWithCapabilitiesDirectly	Gets or sets a value indicating whether the device will try to get/set the capability value only if capability is present in device capability list (Capabilities).
	XferCount	Specifies how many images application wants to receive from the device.

Public Methods

	Name	Description
	Acquire	Acquires image(s) from the device asynchronously.
	AcquireModal	Acquires image(s) from the device synchronously.
	CancelTransfer	Sends the cancel current transfer command to the device (transfer will not be canceled right after execution of this method).
	ClearBuffers	Clears the device buffers according to the specified mode.
	Close	Closes the device.
	Disable	Disables the device.
	Dispose	Releases all resources used by this object.
	Enable	Enables the device.
	GetSupportedAsyncEvents	Returns an array of asynchronous events supported by device.
	GetSupportedBitDepthReductionModes	Returns an array of bit depth reduction modes supported by device.
	GetSupportedBitDepths	Returns an array of bit depths supported by device.
	GetSupportedBrightnessValues	Returns an array of brightness values supported by device.
	GetSupportedContrastValues	Returns an array of contrast values supported by device.
	GetSupportedHalftones	Returns an array of halftones supported by device.
	GetSupportedHorizontalResolutions	Returns an array of horizontal resolutions supported by device.
	GetSupportedImageCompressions	Returns an array of image compressions supported by device in File transfer mode.
	GetSupportedImageFileFormats	Returns an array of image file formats supported by device in File transfer mode.
	GetSupportedImageFilters	Returns an array of image filters supported by device.
	GetSupportedJobControlValues	Returns an array of job control values supported by device.
	GetSupportedLightPaths	Returns an array of light paths supported by device.
	GetSupportedLightSources	Returns an array of light sources supported by device.
	GetSupportedMaxBatchBufferValues	Returns an array with supported numbers of images that the device can buffer when AutoScan is enabled.
	GetSupportedNoiseFilters	Returns an array of noise filters supported by device.
	GetSupportedPageOrientations	Returns an array of page orientations supported by device.
	GetSupportedPageSizes	Returns an array of page sizes supported by device.
	GetSupportedPixelFlavors	Returns an array of pixel flavors supported by device.
	GetSupportedPixelTypes	Returns an array of pixel types supported by device.
	GetSupportedThresholdValues	Returns an array of threshold values supported by device.
	GetSupportedTransferModes	Returns an array of transfer modes supported by device.
	GetSupportedUnitsOfMeasure	Returns an array of units of measure supported by device.
	GetSupportedVerticalResolutions	Returns an array of vertical resolutions supported by device.
	LoadSettings	Overloaded. Loads device settings from the stream.
	Open	Opens the device.
	PerformTwainCommand	Performs TWAIN command.
	SaveSettings	Overloaded. Saves the current device settings to the stream.
	SetResolution	Sets the resolution of images for current scan session.
	ShowSetupDialog	Overloaded. Displays the device setup dialog.
	StopFeeder	Sends the stop document feeder command to the device (document feeder will not be stopped right after execution of this method).

Protected Methods

	Name	Description
	Finalize	Releases all resources used by this object.

Public Events

	Name	Description
	AsyncEvent	Occurs when the asynchronous device event is occurs.
	ImageAcquired	Occurs when image is acquired from device.
	ImageAcquiring	Occurs when image acquisition starts.
	ImageAcquiringProgress	Occurs when image acquisition is in progress (only if Memory transfer mode is used).
	ScanCanceled	Occurs when scan process is canceled.
	ScanCompleted	Occurs when scan session is completed.
	ScanFailed	Occurs when scan process is failed.
	ScanFinished	Occurs when Scan process is finished (scan session is completed; scan is canceled; scan is failed; user interface is closed).
	UserInterfaceClosed	Occurs when the user interface of device is closed.

Reference

Device Class
Vintasoft.Twain Namespace

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