使用适用于 Windows 和 Linux 的 Web 应用程序扫描图像
2024/04/08
// synchronously acquire images from TWAIN/SANE scanner and saves acquired images to PDF file
__synchronouslyAcquireImagesFromTwainScannerAndSaveToPdfFile();
/**
* Synchronously acquires images from TWAIN/SANE scanner and saves acquired images to PDF file.
*/
function __synchronouslyAcquireImagesFromTwainScannerAndSaveToPdfFile() {
// register the evaluation version of VintaSoft Web TWAIN service
// please read how to get evaluation license in documentation: https://www.vintasoft.com/docs/vstwain-dotnet-web/Licensing-Twain_Web-Evaluation.html
Vintasoft.Twain.WebTwainGlobalSettingsJS.register('REG_USER', 'REG_URL', 'REG_CODE', 'EXPIRATION_DATE');
// URL to the VintaSoft Web TWAIN service
var serviceUrl = 'https://localhost:25329/api/VintasoftTwainApi';
// a Web API controller that allows to work with TWAIN and SANE devices
var twainService = new Vintasoft.Shared.WebServiceControllerJS(serviceUrl);
// TWAIN/SANE device manager
var deviceManager = new Vintasoft.Twain.WebTwainDeviceManagerJS(twainService);
// the default settings of device manager
var deviceManagerInitSetting = new Vintasoft.Twain.WebTwainDeviceManagerInitSettingsJS();
var device = null;
try {
// open device manager
deviceManager.open(deviceManagerInitSetting);
// get the default TWAIN/SANE device
device = deviceManager.get_DefaultDevice();
// open device without UI
device.open(false);
// create collection for images acquired from device
var acquiredImages = new Vintasoft.Twain.WebAcquiredImageCollectionJS(deviceManager);
var acquireModalState;
do {
// do one step of modal image acquisition process
var acquireModalResult = device.acquireModalSync();
// get state of image acquisition
acquireModalState = acquireModalResult.get_AcquireModalState().valueOf();
switch (acquireModalState) {
case 2: // image is acquired
// get acquired image
var acquiredImage = acquireModalResult.get_AcquiredImage();
// add acquired image to the collection of acquired images
acquiredImages.add(acquiredImage);
// save acquired image to "result.pdf" file
acquiredImages.saveImages("d:\\result.pdf", false, [ acquiredImage.get_Id() ]);
break;
case 4: // image scan is failed
alert(acquireModalResult.get_ErrorMessage());
break;
case 9: // image scan is finished
break;
}
}
while (acquireModalState !== 0);
}
catch (ex) {
alert(ex);
}
finally {
if (device != null) {
// close the device
device.close();
}
// close the device manager
deviceManager.close();
}
}