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DXCollectionView.GroupExpanding Event

Occurs before a group of items is expanded.

Namespace: DevExpress.Maui.CollectionView

Assembly: DevExpress.Maui.CollectionView.dll

NuGet Package: DevExpress.Maui.CollectionView


public event EventHandler<CancelItemEventArgs> GroupExpanding

Event Data

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

Property Description
Cancel Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs.
ItemHandle Returns the handle of the processed item.


The GroupExpanding event is raised before a group of data items is expanded from UI or code (ExpandGroup). You can handle this event and set its parameter’s Cancel inherited property to true to prevent a group from being expanded.

When you call the ExpandAllGroups method, the GroupExpanding event is raised for each group.

After the group has been expanded, the GroupExpanded event is raised.

See Also