Belge Dönüşüm Sürecini İzle Javascript ile C++ kullanarak
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Olası Kullanım Senaryoları
Bazen büyük Excel dosyalarını dönüştürmek zaman alabilir. Bu süre zarfında, uygulamanızın kullanılabilirliğini artırmak için sadece yükleniyor ekranı yerine belge dönüşüm sürecini göstermek isteyebilirsiniz. Aspose.Cells for JavaScript, C++ aracılığıyla, özel sınıfınızda uygulayabileceğiniz IPageSavingCallback arayüzü sağlayarak belge dönüştürme işlemini izlemeyi destekler. IPageSavingCallback arayüzü, IPageSavingCallback.pageStartSaving(PageStartSavingArgs) ve IPageSavingCallback.pageEndSaving(PageEndSavingArgs) yöntemleriyle kendi özel sınıfınızda uygulayabileceğiniz özellikler sunar. Ayrıca, nasıl sayfaların görüntüleneceği üzerinde kontrol sağlayabilirsiniz, bu örnekte TestPageSavingCallback özel sınıfı gösterilmiştir.
Belge Dönüşüm İlerlemesini İzle
Aşağıdaki kod örneği, kaynak excel dosyasını yükler ve TestPageSavingCallback özelleştirilmiş sınıfını kullanarak dönüştürme ilerlemesini konsola yazdırır. Bu sınıf, IPageSavingCallback arayüzünü uygular.
Örnek Kod
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Pages to PDF with Progress Callback</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, PdfSaveOptions, SaveFormat } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
// Define TestPageSavingCallback class
class TestPageSavingCallback {
onPageSaving(pageIndex, fileName) {
console.log(`Saving page ${pageIndex} to ${fileName}`);
}
}
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const resultDiv = document.getElementById('result');
resultDiv.innerHTML = '';
if (!fileInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate Workbook from uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Create PdfSaveOptions and assign the page saving callback
const pdfSaveOptions = new PdfSaveOptions();
pdfSaveOptions.pageSavingCallback = new TestPageSavingCallback();
// Save workbook as PDF with options
const outputData = workbook.save(SaveFormat.Pdf, pdfSaveOptions);
const blob = new Blob([outputData], { type: "application/pdf" });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'DocumentConversionProgress.pdf';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download PDF File';
resultDiv.innerHTML = '<p style="color: green;">PDF conversion started/completed. Click the download link to get the PDF file.</p>';
});
</script>
</html>
TestPageSavingCallback özel sınıfının kodu aşağıdadır.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Page Saving Callback Example</title>
</head>
<body>
<h1>Page Saving Callback Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example (Save as PDF with Callback)</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, PdfSaveOptions, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
class TestPageSavingCallback {
pageStartSaving(args) {
console.log(`Start saving page index ${args.pageIndex} of pages ${args.pageCount}`);
// don't output pages before page index 2.
if (args.pageIndex < 2) {
args.isToOutput = false;
}
}
pageEndSaving(args) {
console.log(`End saving page index ${args.pageIndex} of pages ${args.pageCount}`);
// don't output pages after page index 8.
if (args.pageIndex >= 8) {
args.hasMorePages = false;
}
}
}
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Create PDF save options and attach the page saving callback
const options = new PdfSaveOptions();
options.pageSavingCallback = new TestPageSavingCallback();
// Save workbook as PDF with the callback applied
const outputData = workbook.save(SaveFormat.Pdf, options);
const blob = new Blob([outputData], { type: 'application/pdf' });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.pdf';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download PDF File';
document.getElementById('result').innerHTML = '<p style="color: green;">PDF generated successfully! Click the download link to get the file.</p>';
});
</script>
</html>
Konsol Çıktısı
Start saving page index 0 of pages 11</br>
End saving page index 0 of pages 11</br>
Start saving page index 1 of pages 11</br>
End saving page index 1 of pages 11</br>
Start saving page index 2 of pages 11</br>
End saving page index 2 of pages 11</br>
Start saving page index 3 of pages 11</br>
End saving page index 3 of pages 11</br>
Start saving page index 4 of pages 11</br>
End saving page index 4 of pages 11</br>
Start saving page index 5 of pages 11</br>
End saving page index 5 of pages 11</br>
Start saving page index 6 of pages 11</br>
End saving page index 6 of pages 11</br>
Start saving page index 7 of pages 11</br>
End saving page index 7 of pages 11</br>
Start saving page index 8 of pages 11</br>
End saving page index 8 of pages 11