使用JavaScript通过C++操作表格和区域

介绍

有时您在Microsoft Excel中创建一个表格，但不想继续使用它带来的表格功能。相反，您想要看起来像表格的东西。为了在不丢失格式的情况下保留表格中的数据，可以将表格转换为普通数据范围。
Aspose.Cells确实支持Microsoft Excel的表格和列表对象的此功能。

使用Microsoft Excel

使用转换为范围功能快速将表格转换为常规数据范围，而不丢失格式。在Microsoft Excel 2007/2010中：

单击表中的任意位置，确保活动单元格位于表列中。
在设计选项卡的工具组中，单击转换为范围。

使用Aspose.Cells

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example - Convert Table to Range</title>
    </head>
    <body>
        <h1>Convert Table to Range 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();

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

            // Access the first worksheet and convert the first table/list object to a normal range
            const worksheet = workbook.worksheets.get(0);
            const listObject = worksheet.listObjects.get(0);
            listObject.convertToRange();

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

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

表格在转换为范围后将不再可用其表格功能。例如，行标头不再包含排序和筛选箭头，以及在公式中使用的结构引用（使用表名称的引用）会变成常规单元格引用。

使用选项将表格转换为范围

Aspose.Cells在将表格转换为范围时提供附加选项，通过TableToRangeOptions类提供TableToRangeOptions类,并提供lastRow属性，允许您设置表格行的最后索引。表格格式将保留到指定的行索引，其余格式将被移除。

以下给出的示例代码演示了TableToRangeOptions类的使用。

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Table to Range Example</title>
    </head>
    <body>
        <h1>Convert Table to Range 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, TableToRangeOptions, 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');
            const downloadLink = document.getElementById('downloadLink');

            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));

            // Create TableToRangeOptions and set lastRow property
            const options = new TableToRangeOptions();
            options.lastRow = 5;

            // Convert the first table/list object (from the first worksheet) to normal range
            workbook.worksheets.get(0).listObjects.get(0).convertToRange(options);

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

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

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