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{RemoteScanObject}

The methods and events on this page live in {RemoteScanObject}.


Scanner

Method

getDynamsoftService

Get all active Dynamsoft Service.

Syntax

getDynamsoftService(forceRefresh?: boolean): Promise<ServiceInfo[]>;;

Parameters

forceRefresh: Default value is false.


getDevices

Based on parameters, return all eligible scan devices.

Syntax

getDevices(deviceQueryParams?:{serviceInfo?: ServiceInfo, deviceType?: Dynamsoft.DWT.EnumDWT_DeviceType, refresh?: boolean}): Promise<Device[]>;

Parameters

serviceInfo: The service information. Please refer to ServiceInfo.

deviceType: The value to filter scanners. Default: TWAINSCANNER. Please refer to EnumDWT_DeviceType.

refresh: Default value is false.


acquireImage

Scan documents into RemoteScanObject.

Syntax

acquireImage(device: Device, deviceConfiguration?: DeviceConfiguration) : Promise<void>;

Parameters

deviceConfiguration: The device configuration. Please refer to DeviceConfiguration


setDefaultDynamsoftService

Set the default service which is used to store the scanned image data.

Syntax

setDefaultDynamsoftService(serviceInfo: ServiceInfo):Promise<void>;

Parameters

serviceInfo: The service information. Please refer to ServiceInfo.

Remark

If the specified service is not working, the default service will keep to the last set one. If the default service is never set, it will return null. If setDefaultDynamsoftService is not called, the default service will be set to the first working service automatically when scanning.


getDefaultDynamsoftService

Get the default service info.

Syntax

getDefaultDynamsoftService(): ServiceInfo|null;

getCapabilities

Gets detailed information about all capabilities of the current data source.

Syntax

getCapabilities(device: Device): Promise<CapabilityDetails[]>;

Parameters

device: Please refer to Device.

Argument

CapabilityDetails: Please refer to CapabilityDetails.


setCapabilities

Sets up one or multiple capabilities in one call.

Syntax

setCapabilities(device: Device, capabilities: Capabilities): Promise<void>;

Parameters

device: Please refer to Device.

capabilities: An object that describes how to set capabilities. Please refer to Capabilities.


closeSource

Close the data source to free it to be used by other applications.

Syntax

closeSource(device: Device): Promise<void>;

Parameters

device: Please refer to Device.


getProfile

Gets custom scanner profile and returns it in a base64 string.

Syntax

getProfile(device: Device): Promise<string>;

Parameters

device: Please refer to Device.


setProfile

Set custom scanner profile to be used for scanning, the input is a base64 string.

Syntax

setProfile(device: Device, dsDataString: string): Promise<void>;

Parameters

device: Please refer to Device.

dsDataString: The base64 string that contains custom scanner profile.


Event

onPostTransferAsync

This event is triggered after each page has been scanned and transferred.

Syntax

registerEvent("onPostTransferAsync", function (outputInfo: OutputInfo) {});

Arguments

outputInfo: Detailed information about the image that just got transferred. Please refer to OutputInfo.

Example

RemoteScanObject.registerEvent("onPostTransferAsync", function (outputInfo) {
  console.log("The image ID is " + outputInfo.imageId);
});

Buffer

Method

howManyImagesInBuffer

Return how many images are held in the buffer.

Syntax

readonly howManyImagesInBuffer: number;

currentImageIndexInBuffer

Return the index of the current image in the buffer or set the image specified by index as the current image.

Syntax

currentImageIndexInBuffer: number;

imageIDToIndex

Return the index of an image specified by the imageId.

Syntax

imageIDToIndex(imageId: number): number;

Parameters

imageId: The imageId of the image.


indexToImageID

Return the imageId of an image specified by the index.

Syntax

indexToImageID(index: number): number;

Parameters

index: The index of the image.


removeImages

Remove the specified images.

Syntax

removeImages(indices: number[]): Promise<void>;

Parameters

indices: The array of specified indices.


Event

onBufferChanged

An enhanced callback triggered when a change occurs in the buffer.

Syntax

registerEvent('onBufferChanged',
    function (bufferChangeInfo: BufferChangeInfo) {}
): boolean;

Arguments

bufferChangeInfo: Details about the buffer change. Please refer to BufferChangeInfo.

Usage notes

Action types include

  • add: New pages are added to the buffer.
  • remove: The existing pages are removed.
  • modify: The existing pages are modified.
  • shift: The existing pages are reordered.
  • filter: The existing pages are filtered by a tag.

IO

getImages

Get the url/blob/base64 string of specified images.

Syntax

getImages(indices: number[], type: Dynamsoft.DWT.EnumDWT_ImageType, imageFormatType: Dynamsoft.DWT.EnumDWT_ImageFormatType):Promise<Blob|string>;

Parameters

indices: The array of specified indices.

type: Specify the image type. Please refer to EnumDWT_ImageType.

imageFormatType: Specify image format to obtain. Please refer to EnumDWT_ImageFormatType.


httpUpload

Syntax

httpUpload(
    URL: string,
    indices: number[],
    type: Dynamsoft.DWT.EnumDWT_ImageType,
    dataFormat: Dynamsoft.DWT.EnumDWT_UploadDataFormat,
    fileName: string,
    optionConfig?:{
      responseType?: Dynamsoft.DWT.EnumDWT_ResponseType, 
      formFields?:[{ 
        name: string,
        value: Blob,
        fileName?: string
      }],
      headers?:[{
      name: string,
      value: string
      }]
    }
): Promise<httpResponse: any>;

Parameters

URL: The server-side script to receive the post. For the sample code of Server Script, please refer to Upload-Server-Script.

indices: Specify the image(s).

type: The format of the file. Please refer to EnumDWT_ImageType.

dataFormat: Whether to upload the file as binary or a base64 string. Please refer to EnumDWT_UploadDataFormat.

fileName: The file name to upload.

responseType: Please refer to EnumDWT_ResponseType.


saveImages

Syntax

saveImages(fileName: string, indices: number[], type: Dynamsoft.DWT.EnumDWT_ImageType):Promise<void>;

Parameters

fileName: The file name to save.

indices: The array of specified indices.

type: Specify the image type. Please refer to EnumDWT_ImageType.


showProgressBar

Return or set whether the progress bar is/should be displayed during encoding or decoding.

Syntax

showProgressBar: Boolean;  //default: true 

Util

registerEvent

Specify an event listener for the specified built-in event.

Syntax

registerEvent(name: string, callback: () => void): boolean;

Parameters

name: Specify the event.

callback: The event listener.


unregisterEvent

Remove an event listener from the specified built-in event.

Syntax

unregisterEvent(name: string, callback: () => void): boolean;

Parameters

name: Specify the event.

callback: The event listener.


dispose

Dispose RemoteScanObject.

Syntax

dispose(): boolean;

setLogLevel

Set the log level for debugging.

Syntax

setLogLevel(value: number):boolean;

Parameters

value: 0 means turn off collecting log, 1 means turn on collecting log.

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