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 End-User Documentation

GridView.MasterRowCollapsing Event

Enables you to control whether master rows can be collapsed.

Namespace:DevExpress.XtraGrid.Views.Grid
Assembly:DevExpress.XtraGrid.v17.1.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type MasterRowCanExpandEventArgs containing data related to this event.

The following MasterRowCanExpandEventArgs properties provide information specific to this event.
Property Description
Allow Gets or sets a value specifying whether the current operation is allowed.
RelationIndex Gets the relation index that identifies the affected detail.
RowHandle Gets the handle of the currently processed master row in the current View.

Expanded Remarks

The MasterRowCollapsing event is raised when attempting to collapse a master row. The master row can be identified using the event's CustomMasterRowEventArgs.RowHandle parameter. If you need to prohibit row collapsing, set the MasterRowCanExpandEventArgs.Allow parameter to false. Note that the MasterRowCollapsing event is raised for each expanded master row when the CollapseAllDetails method is called. This enables you to control which master rows should be collapsed.

Note: the event's CustomMasterRowEventArgs.RelationIndex parameter always returns -1. This tells you that the master row is affected as a whole rather than just an individual detail.

Please refer to the Expanding and Collapsing Master Rows topic for additional information.

Expanded See Also

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