使用JavaScript通过C++合并文件

介绍

Aspose.Cells 提供多种合并文件的方法。对于包含数据、格式和公式的简单文件，可以使用 Workbook.combine(Workbook) 方法合并多个工作簿，使用 Worksheet.copy(Worksheet) 方法将工作表复制到新工作簿。这些方法使用简单且有效，但如果需要合并大量文件，可能会占用大量系统资源。为了避免此问题，可以使用更高效的 **CellsHelper.mergeFiles(string[], string, string)** 静态方法来合并多个文件。

使用Aspose.Cells for JavaScript通过C++合并文件

以下示例代码演示如何使用 **CellsHelper.mergeFiles(string[], string, string)** 方法合并大文件。它处理两个简单但较大的文件 Book1.xls 和 Book2.xls。这些文件仅包含格式化数据和公式。

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Merge Excel Files and Rename Sheets Example</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx" multiple />
        <button id="runExample">Merge and Rename Sheets</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, CellsHelper } = 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');
            resultDiv.innerHTML = '';

            if (!fileInput.files.length || fileInput.files.length < 2) {
                resultDiv.innerHTML = '<p style="color: red;">Please select at least two Excel files to merge.</p>';
                return;
            }

            // Read selected files into Uint8Array array
            const files = [];
            for (let i = 0; i < fileInput.files.length; i++) {
                const file = fileInput.files[i];
                const arrayBuffer = await file.arrayBuffer();
                files.push(new Uint8Array(arrayBuffer));
            }

            // Create cacheFile name and destination name (virtual in browser)
            const cacheFile = "test.txt";
            const dest = "output.xlsx";

            // Call CellsHelper.mergeFiles with file byte arrays, cacheFile name and destination name
            // Note: In the browser environment mergeFiles is expected to accept file byte arrays and return merged file bytes.
            const mergedData = CellsHelper.mergeFiles(files, cacheFile, dest);

            // Log cacheFile as in original code
            console.log(cacheFile);

            // Load the merged workbook from returned bytes
            const workbook = new Workbook(new Uint8Array(mergedData));

            // Rename sheets sequentially starting at 1
            let i = 1;
            const worksheets = workbook.worksheets;
            for (let j = 0; j < worksheets.count; j++) {
                worksheets.get(j).name = `Sheet1${i}`;
                i++;
            }

            // Save the modified workbook and prepare download link
            const outputData = workbook.save(SaveFormat.Xlsx);
            const blob = new Blob([outputData], { type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" });
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'output.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Merged and Renamed Excel File';

            resultDiv.innerHTML = '<p style="color: green;">Files merged and sheets renamed successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>
使用JavaScript通过C++将多个工作表合并为一个工作表。