删除工作表中的空白列和行时更新其他工作表中的引用

当您删除工作表中的空白列和行时，其他工作表中对它们的引用将变得无效。如果您想避免此行为，并希望其他工作表中对当前工作表的引用也得到更新，那么请使用DeleteOptions.updateReference属性并将其设置为true。

删除工作表中的空白列和行时更新其他工作表中的引用

请查看以下示例代码及其控制台输出。第二个工作表中的单元格 E3 具有公式 =Sheet1!C3，引用第一个工作表中的 C3 单元格。如果将 DeleteOptions.updateReference 属性设置为true，删除第一个工作表中的空白列和行后，该公式将更新为 =Sheet1!A1。然而，如果将 DeleteOptions.updateReference 属性设置为false，第二个工作表中的 E3 单元格中的公式将保持不变，仍然是 =Sheet1!C3，此时公式无效。

编程示例

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Delete Blank Rows/Columns and Update References 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');
            let wb;

            if (fileInput.files.length) {
                const file = fileInput.files[0];
                const arrayBuffer = await file.arrayBuffer();
                wb = new Workbook(new Uint8Array(arrayBuffer));
            } else {
                // Create workbook
                wb = new Workbook();
            }

            // Add second sheet with name Sheet2
            wb.worksheets.add("Sheet2");

            // Access first sheet and add some integer value in cell C1
            // Also add some value in any cell to increase the number of blank rows and columns
            const sht1 = wb.worksheets.get(0);
            sht1.cells.get("C1").putValue(4);
            sht1.cells.get("K30").putValue(4);

            // Access second sheet and add formula in cell E3 which refers to cell C1 in first sheet
            const sht2 = wb.worksheets.get(1);
            sht2.cells.get("E3").formula = "'Sheet1'!C1";

            // Calculate formulas of workbook
            wb.calculateFormula();

            // Print the formula and value of cell E3 in second sheet before deleting blank columns and rows in Sheet1.
            let outputHtml = "";
            outputHtml += "<p>Cell E3 before deleting blank columns and rows in Sheet1.</p>";
            outputHtml += "<pre>--------------------------------------------------------</pre>";
            outputHtml += "<p>Cell Formula: " + sht2.cells.get("E3").formula + "</p>";
            outputHtml += "<p>Cell Value: " + sht2.cells.get("E3").stringValue + "</p>";

            // If you comment DeleteOptions.UpdateReference property below, then the formula in cell E3 in second sheet will not be updated
            const opts = new AsposeCells.DeleteOptions();
            opts.updateReference = true;

            // Delete all blank rows and columns with delete options
            sht1.cells.deleteBlankColumns(opts);
            sht1.cells.deleteBlankRows(opts);

            // Calculate formulas of workbook
            wb.calculateFormula();

            // Print the formula and value of cell E3 in second sheet after deleting blank columns and rows in Sheet1.
            outputHtml += "<br/><br/>";
            outputHtml += "<p>Cell E3 after deleting blank columns and rows in Sheet1.</p>";
            outputHtml += "<pre>--------------------------------------------------------</pre>";
            outputHtml += "<p>Cell Formula: " + sht2.cells.get("E3").formula + "</p>";
            outputHtml += "<p>Cell Value: " + sht2.cells.get("E3").stringValue + "</p>";

            document.getElementById('result').innerHTML = outputHtml;

            // Save the modified workbook to download link
            const outputData = wb.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';
        });
    </script>
</html>

控制台输出

这是上述示例代码在将 DeleteOptions.updateReference 属性设置为true时的控制台输出。

 Cell E3 before deleting blank columns and rows in Sheet1.

\--------------------------------------------------------

Cell Formula: =Sheet1!C1

Cell Value: 4


Cell E3 after deleting blank columns and rows in Sheet1.

\--------------------------------------------------------

Cell Formula: =Sheet1!A1

Cell Value: 4

这是上述示例代码在将 DeleteOptions.updateReference 属性设置为false时的控制台输出。可以看到，E3 单元格中的公式没有被更新，其值变为 0，而非 4，公式因此无效。

 Cell E3 before deleting blank columns and rows in Sheet1.

\--------------------------------------------------------

Cell Formula: =Sheet1!C1

Cell Value: 4


Cell E3 after deleting blank columns and rows in Sheet1.

\--------------------------------------------------------

Cell Formula: =Sheet1!C1

Cell Value: 0

使用JavaScript通过C++删除工作表中的重复行