使用JavaScript通过C++获取具有外部链接的范围

获取带有外部链接的范围

许多Excel文件通过外部链接访问其他Excel文件中的数据。Aspose.Cells for JavaScript通过C++提供了使用Name.referredAreas(boolean)方法检索这些外部链接的选项。Name.referredAreas(boolean)方法返回一个ReferredArea类型的数组。ReferredArea类提供一个ReferredArea.externalFileName属性，返回外部文件的名称。ReferredArea类则公开以下成员。

ReferredArea.endColumn: 区域的结束列
ReferredArea.endRow: 区域的结束行
ReferredArea.externalFileName: 获取外部文件名（如果这是外部引用）
ReferredArea.isArea(): 表示这是否是一个区域
ReferredArea.isExternalLink(): 表示这是不是外部链接
ReferredArea.sheetName: 表示这引用在哪个工作表中
ReferredArea.startColumn: 区域的起始列
ReferredArea.startRow: 区域的起始行

下面的示例代码演示了如何使用 Name.referredAreas(boolean) 方法获取带外部链接的范围。

示例代码

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example - External References</title>
    </head>
    <body>
        <h1>Sample External References</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');
            resultDiv.innerHTML = '';

            if (!fileInput.files.length) {
                resultDiv.innerHTML = '<p style="color: red;">Please select an Excel file (SampleExternalReferences.xlsx).</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 named ranges via worksheets.names
            const names = workbook.worksheets.names;
            const namesCount = names.count;
            const outputLines = [];
            outputLines.push(`<p>Processing file: ${file.name}</p>`);
            outputLines.push(`<p>Named Ranges Count: ${namesCount}</p>`);

            for (let i = 0; i < namesCount; i++) {
                const namedRange = names.get(i);
                outputLines.push(`<h3>Named Range ${i}: ${namedRange.name || ('Index ' + i)}</h3>`);

                // Get referred areas (including external references)
                const referredAreas = namedRange.referredAreas(true);
                if (referredAreas) {
                    referredAreas.forEach((referredArea, idx) => {
                        outputLines.push(`<h4>Referred Area ${idx}</h4>`);
                        outputLines.push(`<ul>`);
                        outputLines.push(`<li>IsExternalLink: ${referredArea.isExternalLink}</li>`);
                        outputLines.push(`<li>IsArea: ${referredArea.isArea}</li>`);
                        outputLines.push(`<li>SheetName: ${referredArea.sheetName}</li>`);
                        outputLines.push(`<li>ExternalFileName: ${referredArea.externalFileName}</li>`);
                        outputLines.push(`<li>StartColumn: ${referredArea.startColumn}</li>`);
                        outputLines.push(`<li>StartRow: ${referredArea.startRow}</li>`);
                        outputLines.push(`<li>EndColumn: ${referredArea.endColumn}</li>`);
                        outputLines.push(`<li>EndRow: ${referredArea.endRow}</li>`);
                        outputLines.push(`</ul>`);
                    });
                } else {
                    outputLines.push(`<p>No referred areas for this named range.</p>`);
                }
            }

            resultDiv.innerHTML = outputLines.join('');
        });
    </script>
</html>

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