Applying Subtotal and Changing Direction of Outline Summary Rows below Detail

This article will explain how to apply Subtotal to data and changing the direction of Outline Summary Rows below Detail.

You can apply Subtotal to data using Worksheet.getCells().subtotal() method. It takes the following parameters.

• CellArea - The range to apply subtotal on
• GroupBy - The field to group by, as a zero-based integer offset
• Function - The subtotal function.
• TotalList - An array of zero-based field offsets, indicating the fields to which the subtotals are added.
• Replace - Indicates whether replace the current subtotals
• PageBreaks - Indicates whether add page break between groups
• SummaryBelowData - Indicates whether add summary below data.

Also, you can control the direction of Outline Summary rows below detail as shown in the following screenshot using Worksheet.Outline.SummaryRowBelow property. You can open this setting in Microsoft Excel using Data > Outline > Settings

Images of source and output files

The following screenshot shows the source Excel file used in the sample code below which contains some data in columns A and B.

The following screenshot shows the output Excel file generated by the sample code. As you can see, subtotal has been applied to range A2:B11 and the direction of the outline is summary rows below detail.

Node.js to apply subtotal and change the direction of outline summary rows

Here is the sample code to achieve the output as shown above.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
const AsposeCells = require("aspose.cells.node");

// Create workbook from source Excel file
var workbook = new AsposeCells.Workbook("Book1.xlsx");

// Access the first worksheet
var worksheet = workbook.getWorksheets().get(0);

// Get the Cells collection in the first worksheet
var cells = worksheet.getCells();

// Create a cellarea i.e.., A2:B11
var ca = AsposeCells.CellArea.createCellArea("A2", "B11");


// Apply subtotal, the consolidation function is Sum and it will applied to Second column (B) in the list
cells.subtotal(ca, 0, AsposeCells.ConsolidationFunction.Sum, [1], true, false, true);

// Set the direction of outline summary
worksheet.getOutline().setSummaryRowBelow(true);

// Save the excel file
workbook.save("output_out.xlsx");