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Processing Group Rows

Expanded Group Rows and Group Levels

When grouping is applied, group rows organize data into a tree. Group rows are virtual objects. They do not exist in the grid's data source. Group rows are automatically created when data grouping is applied to combine records with identical values within grouping columns. Ungrouping data automatically removes group rows. Data rows are displayed at the bottommost hierarchy level, and can be accessed by expanding group rows.

Group rows are uniquely identified by their handles. Group row handles are negative (starting from -1), determining the order in which group rows appear within a View according to the sorting and filtering settings. To learn more, see Identifying Rows and Cards.

To determine whether a row handle corresponds to a group row, use the GridControl.IsGroupRowHandle method. To obtain the grouping level at which a row (group or data row) resides, use the GridControl.GetRowLevelByRowHandle or GridControl.GetRowLevelByVisibleIndex method.

Expanded Get Group Row Info

Use the following methods:

Expanded Iterate Through Child Rows

To iterate through the child rows belonging to a group row, use the following methods:

Expanded Example: How to Obtain the Number of Group Rows Displayed within a View

This example shows how to obtain the total number of group rows displayed within a view.

The total number of visible rows is returned by the DataControlBase.VisibleRowCount property. The GridControl.GetRowHandleByVisibleIndex method is used to obtain the processed row's handle by its position within the view. The GridControl.IsGroupRowHandle method is used to identify whether the processed row is the group row.

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