GridControl.GroupRowCollapsing Event

Occurs before a group row is collapsed.

Namespace: DevExpress.Mobile.DataGrid

Assembly: DevExpress.Mobile.Grid.v18.2.dll

Declaration

C#

public event RowAllowEventHandler GroupRowCollapsing

VB.NET

Public Event GroupRowCollapsing As RowAllowEventHandler

Event Data

The GroupRowCollapsing event's data class is RowAllowEventArgs. The following properties provide information specific to this event:

Property	Description
Allow	Gets or sets a value specifying whether the current operation (group row expanding or collapsing) is allowed.
RowHandle	Gets the row handle. Inherited from RowEventArgs.

Remarks

Important

This documentation topic describes legacy technology. We no longer develop new functionality for the GridControl and suggest that you use the new DataGridView control instead.

The GroupRowCollapsing event is raised before a group row is collapsed by an end-user or in code, allowing you to cancel this action. To prevent a group row from being collapsed, set the event parameter’s Allow property to false.

The GridControl.CollapseAllGroups method allows you to collapse all group rows. In this instance, the GroupRowCollapsing event is raised for each group.

After the group row has been collapsed, the GridControl.GroupRowCollapsed event is raised.