{WebTwainObject} Util

The properties and methods on this page live in the namespace {WebTwainObject}. {WebTwainObject} denotes the WebTwain instance. Learn about how to create a web twain object.

• Desktop Service
• Android Service

Methods

Properties

The Android Service Edition only supports a subset of the APIs available in the Desktop Service Edition. For the APIs that are compatible with both editions, the usage remains the same. To learn how to use the APIs, please refer to the documentation for the Desktop Service Edition.

Methods

Properties

isUsingActiveX

Return whether the WebTwain object is running the ActiveX edition.

Syntax

isUsingActiveX(): boolean;

Availability

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.

Availability

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.

Availability

Usage notes

There can only be one listener for each built-in event. If you call RegisterEvent on the same event again, the new callback will replace the old one.

SetLanguage

Set the language for the authorization dialogs.

Syntax

SetLanguage(
    language: Dynamsoft.DWT.EnumDWT_Language | number
): boolean;

Parameters

language: Specify the language. Please refer to EnumDWT_Language

Availability

Usage notes

The language set with this method is only for the built-in security dialogs which show up when the user tries to access a scanner, a camera or a local file.

GenerateURLForUploadData

Generate a URL to be used by a FileUpoader instance to fetch the data to upload.

Syntax

GenerateURLForUploadData(
    indices: number[],
    type: Dynamsoft.DWT.EnumDWT_ImageType | number,
    successCallback: (
        resultURL: string,
        indices: number[],
        type: Dynamsoft.DWT.EnumDWT_ImageType | number
    ) => void,
    failureCallback: (
        errorCode: number,
        errorString: string
    ) => void
): void;

Parameters

indices: Specify the images to upload.

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

successCallback: A callback function that is executed if the request succeeds.

• resultURL: The generated URL.
• indices: The indices of the images.
• type: The file type. Please refer to EnumDWT_ImageType.

failureCallback: A callback function that is executed if the request fails.

• errorCode: The error code.
• errorString: The error string.

Availability

ErrorCode

Return the error code.

Syntax

readonly ErrorCode: number;

Availability

Usage notes

The ErrorCode and ErrorString always reflect the result of the last API call. So make sure you read them in time.

ErrorString

Return the error string.

Syntax

readonly ErrorString: string;

Availability

Usage notes

The ErrorCode and ErrorString always reflect the result of the last API call. So make sure you read them in time.

LogLevel

Return or set the log level for debugging.

Syntax

LogLevel: number;

Availability

Usage notes

The logs for the Dynamic Web TWAIN library are saved in the directory C:\Windows\SysWOW64\Dynamsoft\DynamsoftServicex64_17\log\. By default, LogLevel is 0 and nothing is recorded. When it is set to 1, all debugging information is recorded. This setting in your application will apply to all machines. Please set it back to 0 if you don’t need to record log as it will slow down the speed.

Manufacturer

Manufacturer in the identity string of the Dynamic Web TWAIN library.

Syntax

readonly Manufacturer: string;

Availability

Usage notes

Manufacturer , ProductFamily , ProductName and VersionInfo together form the identity string of the Dynamic Web TWAIN library.

ProductFamily

ProductFamily in the identity string of the Dynamic Web TWAIN library.

Syntax

readonly ProductFamily: string;

Availability

Usage notes

Manufacturer , ProductFamily , ProductName and VersionInfo together form the identity string of the Dynamic Web TWAIN library.

ProductName

ProductName in the identity string of the Dynamic Web TWAIN library.

Syntax

readonly ProductName: string;

Availability

Usage notes

Manufacturer , ProductFamily , ProductName and VersionInfo together form the identity string of the Dynamic Web TWAIN library.

VersionInfo

VersionInfo in the identity string of the Dynamic Web TWAIN library.

Syntax

readonly VersionInfo: string;

Availability

Usage notes

Manufacturer , ProductFamily , ProductName and VersionInfo together form the identity string of the Dynamic Web TWAIN library.