Eliminar filas y columnas en blanco en una hoja de cálculo con JavaScript vía C++

Es posible eliminar todas las filas y columnas en blanco de una hoja de cálculo. Esto es útil cuando, por ejemplo, se genera un archivo PDF a partir de un archivo de Microsoft Excel y se desea convertir solo filas y columnas que contienen datos u objetos relacionados.

Use los siguientes métodos de Aspose.Cells para eliminar filas y columnas vacías:

Para eliminar filas en blanco, utilice el método Cells.deleteBlankRows(). Tenga en cuenta que, para las filas en blanco que se eliminarán, no solo es necesario que Row.isBlank() sea verdadero, sino que también no debe haber comentarios visibles definidos para ninguna celda en esas filas, y no debe haber una tabla dinámica cuyo rango se interseque con ellas.
Para eliminar columnas en blanco, use el método Cells.deleteBlankColumns().

Código JavaScript para eliminar filas en blanco

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Delete Blank Rows Example</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, SaveFormat, Utils } = 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 resultDiv = document.getElementById('result');

            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();

            // Instantiating a Workbook object from the uploaded file
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Access worksheets collection
            const sheets = workbook.worksheets;

            // Get first worksheet
            const sheet = sheets.get(0);

            // Delete blank rows from the worksheet
            sheet.cells.deleteBlankRows();

            // Save the modified workbook and provide a 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 = 'mybook.out.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

            resultDiv.innerHTML = '<p style="color: green;">Blank rows deleted successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

Código JavaScript para eliminar columnas en blanco

<!DOCTYPE html>
<html>
    <head>
        <title>Delete Blank Columns Example</title>
    </head>
    <body>
        <h1>Delete Blank Columns Example</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, SaveFormat } = 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');
            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 a Worksheets object with reference to the sheets of the Workbook.
            const sheets = workbook.worksheets;

            // Get first Worksheet from WorksheetCollection
            const sheet = sheets.get(0);

            // Delete the Blank Columns from the worksheet
            sheet.cells.deleteBlankColumns();

            // Saving the modified Excel file
            const outputData = workbook.save(SaveFormat.Xlsx);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'mybook.out.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

            document.getElementById('result').innerHTML = '<p style="color: green;">Blank columns deleted successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

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