The C1GridView data grouping features allow you to automatically calculate data aggregates and create trees with nodes that can be collapsed and expanded.

If ShowGroupArea is set to True, a grouping area will appear at the top of the grid:

To group at run time, simply drag a column header into the grouping area. Note that you may need to set the AllowColMoving property to True to allow run-time column manipulation.

The C1GridView data grouping features are controlled by two properties of the C1Field class:

• The GroupInfo property determines whether a group should be created for the column, as well as the appearance, position, and content of the group header and group footer rows.
• The Aggregate property determines the type of aggregate that should be calculated for this column and included in the group header and footer rows.

Typically, you will set the GroupInfo property for columns that contain categories that you would like to group on (for example, OrderYear, Country, and so on). You will set the Aggregateproperty for columns that contain the values that you want to aggregate on (for example, Amount, Sales, Expenses, and so on).

You can customize the text that appears in the grouping area by setting the GroupAreaCaption property.