用 JavaScript 和 C++ 显示或隐藏行、列和滚动条

Aspose.Cells提供了一种控制工作表的行、列和滚动条可见性的方法。

显示和隐藏行和列

使用 C++ 的 Aspose.Cells for JavaScript 提供了一个类 Workbook，代表一个 Microsoft Excel 文件。Workbook 类包含一个 worksheets 集合，允许开发人员访问 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 集合提供了多种管理行或列的方法，以下几种为例。

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>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Unhide 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, 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');
            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.unhideRow(2, 13.5);
            worksheet.cells.unhideColumn(1, 8.5);

            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>

在还原隐藏列时，如果需要恢复到之前设置的宽度或原始宽度，请使用负宽度取消隐藏列。例如：worksheet.Cells.unhideColumn(5, -1)

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>Aspose.Cells Hide Row/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();

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

            // Access the first worksheet
            const worksheet = workbook.worksheets.get(0);

            // Hide the 3rd row (index 2) and 2nd column (index 1)
            worksheet.cells.hideRow(2);
            worksheet.cells.hideColumn(1);

            // Save the modified workbook and provide a download link
            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。

隐藏多个行和列

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, 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 by 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);

            // 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]);
            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>

显示和隐藏滚动条

滚动条用于浏览任何文件的内容。通常有两种类型的滚动条：

垂直滚动条
水平滚动条

Microsoft Excel还提供水平和垂直滚动条，以便用户可以滚动工作表内容。使用Aspose.Cells，开发人员可以控制Excel文件中两种类型滚动条的可见性。

控制滚动条的可见性

Aspose.Cells提供了一个类Workbook，代表一个Excel文件。Workbook类提供了丰富的属性和方法用以管理Excel文件。若要控制滚动条的显示，请使用WorkbookSettings.isVScrollBarVisible()和WorkbookSettings.isHScrollBarVisible()属性。WorkbookSettings.isVScrollBarVisible()和WorkbookSettings.isHScrollBarVisible()是布尔型属性，只能存储true或false。

显示滚动条

通过将WorkbookSettings.isHScrollBarVisible()类的WorkbookSettings.isVScrollBarVisible()或WorkbookSettings.isHScrollBarVisible()属性设置为true，使滚动条可见。

隐藏滚动条

通过将WorkbookSettings.isHScrollBarVisible()类的WorkbookSettings.isVScrollBarVisible()或WorkbookSettings.isHScrollBarVisible()属性设置为false，隐藏滚动条。

示例代码

下面是一个完整的代码，打开一个Excel文件book1.xls，隐藏两个滚动条，然后将修改后的文件保存为output.xls。

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Aspose.Cells - Hide Scrollbars 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));

            // Hiding the vertical scroll bar of the Excel file
            workbook.settings.isVScrollBarVisible = false;

            // Hiding the horizontal scroll bar of the Excel file
            workbook.settings.isHScrollBarVisible = false;

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

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