Définir la police par défaut lors du rendu du tableur en images avec JavaScript via C++

Définir la police par défaut lors du rendu de feuilles de calcul en images

Le code d’exemple suivant crée un classeur, ajoute du texte dans la cellule A4 de la première feuille, et définit sa police avec une police invalide ou inexistante. Ensuite, il prend deux images de la feuille de calcul. La première image est prise en réglant la propriété ImageOrPrintOptions.defaultFont à Courier New et la seconde en réglant la propriété ImageOrPrintOptions.defaultFont à Times New Roman.

Voici l’image de sortie après avoir réglé la propriété ImageOrPrintOptions.defaultFont à Courier New.

todo:image_alt_text

Voici l’image de sortie après avoir réglé la propriété ImageOrPrintOptions.defaultFont à Times New Roman.

todo:image_alt_text

Code d’exemple

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Aspose.Cells Example - Render Worksheet to Images with Default Fonts</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
        <button id="runExample">Run Example</button>
        <div>
            <a id="downloadLink1" style="display: none; margin-right: 10px;">Download Courier New Image</a>
            <a id="downloadLink2" style="display: none;">Download Times New Roman Image</a>
        </div>
        <div id="result"></div>
    </body>

    <script src="aspose.cells.js.min.js"></script>
    <script type="text/javascript">
        const { Workbook, SaveFormat, ImageOrPrintOptions, ImageType, SheetRender } = 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').addEventListener('click', async () => {
            const fileInput = document.getElementById('fileInput');
            const result = document.getElementById('result');
            const downloadLink1 = document.getElementById('downloadLink1');
            const downloadLink2 = document.getElementById('downloadLink2');

            if (!fileInput.files.length) {
                result.innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
                return;
            }

            // Read the selected file
            const file = fileInput.files[0];
            const arrayBuffer = await file.arrayBuffer();

            // Instantiate Workbook from uploaded file
            const wb = new Workbook(new Uint8Array(arrayBuffer));

            // Set default font of the workbook to none
            let s = wb.defaultStyle;
            s.font.name = "";
            wb.defaultStyle = s;

            // Access first worksheet.
            const ws = wb.worksheets.get(0);

            // Access cell A4 and add some text inside it.
            const cell = ws.cells.get("A4");
            cell.value = "This text has some unknown or invalid font which does not exist.";

            // Set the font of cell A4 which is unknown.
            let st = cell.style;
            st.font.name = "UnknownNotExist";
            st.font.size = 20;
            st.isTextWrapped = true;
            cell.style = st;

            // Set first column width and fourth row height
            ws.cells.setColumnWidth(0, 80);
            ws.cells.setRowHeight(3, 60);

            // Create image or print options.
            const opts = new ImageOrPrintOptions();
            opts.onePagePerSheet = true;
            opts.imageType = ImageType.Png;

            // Render worksheet image with Courier New as default font.
            opts.defaultFont = "Courier New";
            let sr = new SheetRender(ws, opts);
            const imgData1 = sr.toImage(0);
            const blob1 = new Blob([imgData1], { type: 'image/png' });
            downloadLink1.href = URL.createObjectURL(blob1);
            downloadLink1.download = 'out_courier_new_out.png';
            downloadLink1.style.display = 'inline-block';
            downloadLink1.textContent = 'Download Courier New Image';

            // Render worksheet image again with Times New Roman as default font.
            opts.defaultFont = "Times New Roman";
            sr = new SheetRender(ws, opts);
            const imgData2 = sr.toImage(0);
            const blob2 = new Blob([imgData2], { type: 'image/png' });
            downloadLink2.href = URL.createObjectURL(blob2);
            downloadLink2.download = 'times_new_roman_out.png';
            downloadLink2.style.display = 'inline-block';
            downloadLink2.textContent = 'Download Times New Roman Image';

            result.innerHTML = '<p style="color: green;">Images rendered successfully! Use the download links to save the PNG files.</p>';
        });
    </script>
</html>
Fichier de feuille de calcul en image Définir le format pixel pour l image rendue avec JavaScript via C++