Grouping and Ungrouping Rows and Columns

Introduction

In a Microsoft Excel file, you can create an outline for the data to let you show and hide levels of detail with a single mouse click.

Click the Outline Symbols (1, 2, 3, + and –) to quickly display only the rows or columns that provide summaries or headings for sections in a worksheet, or you can use the symbols to see details under an individual summary or heading, as shown below in the figure:

Grouping Rows and Columns.

Group Management of Rows and Columns

Aspose.Cells provides a class, Workbook that represents a Microsoft Excel file. The Workbook class contains a WorksheetCollection that allows access to each worksheet in the Excel file. A worksheet is represented by the Worksheet class. The Worksheet class provides a Cells collection that represents all cells in the worksheet.

The Cells collection provides several methods to manage rows or columns in a worksheet; a few of these are discussed below in more detail.

Grouping Rows and Columns

It is possible to group rows or columns by calling the GroupRows and GroupColumns methods of the Cells collection. Both methods take the following parameters:

• First row/column index – the first row or column in the group.
• Last row/column index – the last row or column in the group.
• Is hidden – a Boolean parameter that specifies whether to hide rows/columns after grouping or not.

Group Settings

Microsoft Excel allows you to configure group settings for display:

• Summary rows below detail.
• Summary columns to the right of detail.

Developers can configure these group settings using the Outline property of the Worksheet class.

Summary Rows Below Detail

It is possible to control whether summary rows are displayed below detail by setting the Outline class' SummaryRowBelow property to true or false.

Summary Columns to Right of Detail

Developers can also control displaying summary columns to the right of detail by setting the SummaryColumnRight property of the Outline class to true or false.

Ungrouping Rows and Columns

To ungroup any grouped rows or columns, call the Cells collection’s UngroupRows and UngroupColumns methods. Both methods take two parameters:

• First row or column index – the first row/column to be ungrouped.
• Last row or column index – the last row/column to be ungrouped.

UngroupRows has an overload that takes a Boolean third parameter. Setting it to true removes all grouped information; otherwise, only the outer group information is removed.