Format Rows and Columns with JavaScript via C++

Working with Rows

How to Adjust Row Height

Aspose.Cells for JavaScript via C++ provides a class, Workbook, that represents a Microsoft Excel file. The Workbook class contains a WorksheetCollection that allows access to each worksheet in the Excel file. A worksheet is represented by the Worksheet class. The Worksheet class provides a cells collection that represents all cells in the worksheet.

The cells collection provides several methods to manage rows or columns in a worksheet. Some of these are discussed below in more detail.

How to Set the Height of a Row

It is possible to set the height of a single row by calling the cells collection’s rowHeight(number, number) method. The rowHeight(number, number) method takes the following parameters as follows:

  • Row index, the index of the row that you’re changing the height of.
  • Row height, the row height to apply on the row.
<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Set Row Height 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();
            
            const workbook = new Workbook(new Uint8Array(arrayBuffer));
            
            const worksheet = workbook.worksheets.get(0);
            
            worksheet.cells.rows.get(1).height = 13;
            
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'output.out.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';
            
            document.getElementById('result').innerHTML = '<p style="color: green;">Row height set successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

How to Set the Height of All Rows in a Worksheet

If developers need to set the same row height for all rows in the worksheet, they can do it by using the standardHeight() property of the cells collection.

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example - Set Standard Row Height</title>
    </head>
    <body>
        <h1>Set Standard Row Height 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
            // Opening the Excel file through the file stream
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Accessing the first worksheet in the Excel file
            const worksheet = workbook.worksheets.get(0);

            // Setting the height of all rows in the worksheet to 15
            worksheet.cells.standardHeight = 15;

            // Saving the modified Excel file
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'output.out.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

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

Working with Columns

How to Set the Width of a Column

Set the width of a column by calling the cells collection’s columnWidth(number, number) method. The columnWidth(number, number) method takes the following parameters:

  • Column index, the index of the column that you’re changing the width of.
  • Column width, the desired column width.
<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Set Column Width Example</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
        <button id="runExample">Set Column Width</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
            // Opening the Excel file through the file stream
            const workbook = new Workbook(new Uint8Array(arrayBuffer));
            
            // Accessing the first worksheet in the Excel file
            const worksheet = workbook.worksheets.get(0);
            
            // Setting the width of the second column to 17.5
            worksheet.cells.columns.get(1).width = 17.5;
            
            // Saving the modified Excel file
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'output.out.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';
            
            document.getElementById('result').innerHTML = '<p style="color: green;">Column width set successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

How to Set Column Width in Pixels

Set the width of a column by calling the cells collection’s columnWidthPixel(number, number) method. The columnWidthPixel(number, number) method takes the following parameters:

  • Column index, the index of the column that you’re changing the width of.
  • Column width, the desired column width in pixels.
<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example - Set Column Width In Pixels</title>
    </head>
    <body>
        <h1>Set Column Width In Pixels</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));
            
            // Accessing the first worksheet in the Excel file
            const worksheet = workbook.worksheets.get(0);
            
            // Set the width of the column in pixels
            // Converted from: worksheet.getCells().setColumnWidthPixel(7, 200);
            // UNIVERSAL GETTER/SETTER CONVERSION applied:
            worksheet.cells.columnWidthPixel = [7, 200];
            
            // 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 = 'SetColumnWidthInPixels_Out.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';
            
            document.getElementById('result').innerHTML = '<p style="color: green;">Column width set successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

How to Set the Width of All Columns in a Worksheet

To set the same column width for all columns in the worksheet, use the cells collection’s standardWidth() property.

<!DOCTYPE html>
<html>
    <head>
        <title>Set Standard Width Example</title>
    </head>
    <body>
        <h1>Set Standard Width 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');
            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 by opening the Excel file
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Accessing the first worksheet in the Excel file
            const worksheet = workbook.worksheets.get(0);

            // Setting the width of all columns in the worksheet to 20.5
            worksheet.cells.standardWidth = 20.5;

            // Saving the modified Excel file
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData]);
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'output.out.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

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

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