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DiagramControl.QueryItemEditAction Event

Fires each time the end-user attempts to initiate text editing to edit the text within a diagram item.

Namespace: DevExpress.Xpf.Diagram

Assembly: DevExpress.Xpf.Diagram.v23.2.dll

NuGet Package: DevExpress.Wpf.Diagram


public event EventHandler<DiagramQueryItemEditActionEventArgs> QueryItemEditAction

Event Data

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

Property Description
Allow Specifies whether to allow editing the item’s text.
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.
Item Returns the item whose text the end-user is attempting to edit.
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.
Source Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.

The event data class exposes the following methods:

Method Description
InvokeEventHandler(Delegate, Object) When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object) When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.


The Item property returns the diagram item for which the end-user attempts to initiate text editing. Set the event’s Allow property to false to prevent the end-user from initiating text editing.

See Also