用JavaScript通过C++隐藏和显示行列

有时，隐藏工作表中的某些行或列，稍后再显示它们是有意义的。Microsoft Excel提供了此功能，Aspose.Cells也是。

控制行和列的可见性

Aspose.Cells for JavaScript通过C++提供了一个类，Workbook，代表一个Microsoft Excel文件。Workbook类包含一个WorksheetCollection，允许开发者访问Excel文件中的每个工作表。工作表由Worksheet类表示。Worksheet类提供一个Cells集合，表示工作表中的所有单元格。Cells集合提供多个方法用于管理工作表中的行或列。以下简要介绍其中一些。

隐藏行和列

开发者可以通过调用Cells集合的hideRow(number)和hideColumn(number)方法，隐藏某一行或列。两个方法都接受行或列的索引作为参数以隐藏对应的行或列。

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Hide Row and Column 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');
            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 with Uint8Array
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

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

            // Hiding the 3rd row of the worksheet
            worksheet.cells.hideRow(2);

            // Hiding the 2nd column of the worksheet
            worksheet.cells.hideColumn(1);

            // 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;">Row and column hidden successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>

还可以通过将行高或列宽设置为0来隐藏行或列。

显示行和列

开发者可以通过调用Cells集合的unhideRow(number, number)和unhideColumn(number, number)方法，显示任何隐藏的行或列。两个方法都接受两个参数：

行或列索引 - 用于显示特定行或列的索引。
行高或列宽 - 在取消隐藏后分配给行或列的行高或列宽。

<!DOCTYPE html>
<html>
    <head>
        <title>Unhide Rows and Columns Example</title>
    </head>
    <body>
        <h1>Unhide Rows and Columns Example</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx" />
        <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 with file buffer
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

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

            // Unhiding the 3rd row and setting its height to 13.5
            worksheet.cells.unhideRow(2, 13.5);

            // Unhiding the 2nd column and setting its width to 8.5
            worksheet.cells.unhideColumn(1, 8.5);

            // 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.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

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

在显示隐藏列时，如果需要恢复为之前设置的宽度或原始宽度，请用负宽度取消隐藏该列。例如：worksheet.cells.unhideColumn(5, -1)

隐藏多行和列

开发者还可以一次隐藏多行或多列，通过调用Cells集合的hideRows(number, number)和hideColumns(number, number)方法，两个方法都接受起始行或列索引和隐藏的行或列数目作为参数。

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example - Hide Rows and Columns</title>
    </head>
    <body>
        <h1>Hide Rows and 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, Worksheet, Cell, 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));

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

            // Hiding 3, 4, and 5 rows in the worksheet (rows are zero-based index)
            worksheet.cells.hideRows(2, 3);

            // Hiding 2 and 3 columns in the worksheet (columns are zero-based index)
            worksheet.cells.hideColumns(1, 2);

            // Saving the modified Excel file
            const outputData = workbook.save(SaveFormat.Excel97To2003);
            const blob = new Blob([outputData], { type: 'application/octet-stream' });
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'output.xls';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

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

也可以使用 Cells 类的 unhideRows(number, number, number) 和 unhideColumns(number, number, number) 方法，将多行和多列设为可见。

用JavaScript通过C++对行和列进行分组和取消分组插入和删除Excel文件的行和列