GridControl.MasterRowExpanding Event

Enables you to specify whether a master row may be expanded.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v20.1.dll


public event RowAllowEventHandler MasterRowExpanding
Public Event MasterRowExpanding As RowAllowEventHandler

Event Data

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

Property Description
Allow Gets or sets whether the operation is allowed.
Handled Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Row Gets the processed row. Inherited from RowEventArgs.
RowHandle Gets the processed row's handle. Inherited from RowEventArgs.
Source Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.


The MasterRowExpanding event fires when a master row is about to be expanded. This happens when an end-user tries to expand a row and when you call an appropriate method, such as GridControl.ExpandMasterRow. By using the event's arguments you can identify the row being collapsed and determine whether to allow this operation.

Once a row has been expanded, the grid raises the GridControl.MasterRowExpanded event.

See Also