Specifying the Absolute Position of the Pivot Item

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The following sample code creates a Pivot Table and then specifies the Pivot Items' positions in the same parent node. You can download the source Excel and output Excel files for your reference. If you open the output Excel file, you will see the Pivot Item “4H12” is at the 0th position in parent “K11” and “DIF400” is at the 3rd position. Similarly, CA32 is at position 1 and AAA3 is at position 2.

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells PivotTable Example</title>
    </head>
    <body>
        <h1>PivotTable 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, PivotFieldType, PivotFieldSubtotalType } = 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');
            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 uploaded file
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Add pivot worksheet and get data worksheet
            const wsPivot = workbook.worksheets.add("pvtNew Hardware");
            const wsData = workbook.worksheets.get("New Hardware - Yearly");

            // Get the pivottables collection for the pivot sheet
            const pivotTables = wsPivot.pivotTables;

            // Add PivotTable to the worksheet
            const index = pivotTables.add("='New Hardware - Yearly'!A1:D621", "A3", "HWCounts_PivotTable");

            // Get the PivotTable object
            const pvtTable = pivotTables.get(index);

            // Add vendor row field
            pvtTable.addFieldToArea(PivotFieldType.Row, "Vendor");

            // Add item row field
            pvtTable.addFieldToArea(PivotFieldType.Row, "Item");

            // Add data field
            pvtTable.addFieldToArea(PivotFieldType.Data, "2014");

            // Turn off the subtotals for the vendor row field
            const pivotField = pvtTable.rowFields.get("Vendor");
            pivotField.subtotals = PivotFieldSubtotalType.None;

            // Turn off grand total
            pvtTable.columnGrand = false;

            /*
             * Please call the PivotTable.refreshData() and PivotTable.calculateData()
             * before using PivotItem.position,
             * PivotItem.positionInSameParentNode and PivotItem.move methods.
            */
            pvtTable.refreshData();
            pvtTable.calculateData();

            pvtTable.rowFields.get("Item").pivotItems.get("4H12").positionInSameParentNode = 0;
            pvtTable.rowFields.get("Item").pivotItems.get("DIF400").positionInSameParentNode = 3;

            /* 
             * As a result of using PivotItem.positionInSameParentNode,
             * the original sort sequence will change.
             * So when you use PivotItem.positionInSameParentNode in another parent node,
             * you need to call the method named `calculateData` again. 
            */
            pvtTable.calculateData();

            pvtTable.rowFields.get("Item").pivotItems.get("CA32").positionInSameParentNode = 1;
            pvtTable.rowFields.get("Item").pivotItems.get("AAA3").positionInSameParentNode = 2;

            // Saving the modified Excel file and providing 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_out.xlsx';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download Modified Excel File';

            resultDiv.innerHTML = '<p style="color: green;">PivotTable created successfully! Click the download link to get the modified file.</p>';
        });
    </script>
</html>
Setting Pivot Table Option - For Empty Cells Show Delete Pivot Table from a Worksheet