Arbeta med ContentTypeProperties med JavaScript via C++

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Aspose.Cells tillhandahåller Workbook.contentTypeProperties metod för att lägga till anpassade ContentTypeProperties i en Excel-fil. Du kan också göra egenskapen valfri genom att sätta ContentTypeProperty.isNillable() egenskapen till true. Följande kodavsnitt demonstrerar att lägga till valfria anpassade ContentTypeProperties i en Excel-fil. Bilden nedan visar båda egenskaperna som tillfogades av kodexemplet.

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Utdatafilen som genererats av exempelkoden bifogas för referens.

Utdatafil

Exempelkod

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Working With Content Type Properties</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
        <button id="runExample" disabled>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, SaveFormat, FileFormatType } = AsposeCells;

        AsposeCells.onReady({
            license: "/lic/aspose.cells.enc",
            fontPath: "/fonts/",
            fontList: [
                "arial.ttf",
                "NotoSansSC-Regular.ttf"
            ]
        }).then(() => {
            console.log("Aspose.Cells initialized");
            document.getElementById('runExample').disabled = false;
        });

        document.getElementById('runExample').addEventListener('click', async () => {
            const resultDiv = document.getElementById('result');

            // Creating a new Workbook with Xlsx format
            const workbook = new Workbook(FileFormatType.Xlsx);

            // Adding content type properties
            let index = workbook.contentTypeProperties.add("MK31", "Simple Data");
            workbook.contentTypeProperties.get(index).isNillable = false;

            index = workbook.contentTypeProperties.add("MK32", new Date().toISOString(), "DateTime");
            workbook.contentTypeProperties.get(index).isNillable = true;

            // Saving the workbook and preparing download link
            const outputData = workbook.save(SaveFormat.Xlsx);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'WorkingWithContentTypeProperties_out.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Excel File';

            resultDiv.innerHTML = '<p style="color: green;">Workbook created successfully! Click the download link to get the file.</p>';
        });
    </script>
</html>
Frigör ohanterade resurser i arbetsboken med JavaScript via C++