Namespaces
- Autodesk.Revit.ApplicationServices
- Autodesk.Revit.Attributes
- Autodesk.Revit.Creation
- Autodesk.Revit.DB
- Autodesk.Revit.DB.Analysis
- Autodesk.Revit.DB.Architecture
- Autodesk.Revit.DB.DirectContext3D
- Autodesk.Revit.DB.Electrical
- Autodesk.Revit.DB.Events
- Autodesk.Revit.DB.ExtensibleStorage
- Autodesk.Revit.DB.ExternalService
- Autodesk.Revit.DB.Fabrication
- Autodesk.Revit.DB.IFC
- Autodesk.Revit.DB.Infrastructure
- Autodesk.Revit.DB.Lighting
- Autodesk.Revit.DB.Macros
- Autodesk.Revit.DB.Mechanical
- Autodesk.Revit.DB.Plumbing
- Autodesk.Revit.DB.PointClouds
- Autodesk.Revit.DB.Steel
- Autodesk.Revit.DB.Structure
- Autodesk.Revit.DB.Structure.StructuralSections
- Autodesk.Revit.DB.Visual
- Autodesk.Revit.Exceptions
- Autodesk.Revit.UI
- Autodesk.Revit.UI.Events
  - ApplicationClosingEventArgs Class
  - BeforeExecutedEventArgs Class
  - CanExecuteEventArgs Class
  - ComboBoxCurrentChangedEventArgs Class
  - ComboBoxDropDownClosedEventArgs Class
  - ComboBoxDropDownOpenedEventArgs Class
  - CommandEventArgs Class
  - DialogBoxData Class
  - DialogBoxShowingEventArgs Class
  - DisplayingOptionsDialogEventArgs Class
  - DockableFrameFocusChangedEventArgs Class
  - DockableFrameVisibilityChangedEventArgs Class
  - ExecutedEventArgs Class
  - ExternalDataManagerChangedEventArgs Class
  - FabricationPartBrowserChangedEventArgs Class
  - FabricationPartBrowserOperation Enumeration
  - FormulaEditingEventArgs Class
  - IdlingEventArgs Class
  - MacroUpdatedEventArgs Class
  - MessageBoxData Class
  - MessageBoxShowingEventArgs Class
  - RibbonItemEventArgs Class
  - SelectionChangedEventArgs Class
  - TaskDialogShowingEventArgs Class
  - TextBoxEnterPressedEventArgs Class
  - ThemeChangedEventArgs Class
  - TransferredProjectStandardsEventArgs Class
  - TransferringProjectStandardsEventArgs Class
  - ViewActivatedEventArgs Class
  - ViewActivatingEventArgs Class
- Autodesk.Revit.UI.Macros
- Autodesk.Revit.UI.Mechanical
- Autodesk.Revit.UI.Plumbing
- Autodesk.Revit.UI.Selection
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BeforeExecutedEventArgs Class

Revit 2026 API

BeforeExecutedEventArgs Class

The event arguments used by AddInCommandBinding's BeforeExecuted event.

Inheritance Hierarchy

SystemObject
  SystemEventArgs
    Autodesk.Revit.DB.EventsRevitEventArgs
      Autodesk.Revit.UI.EventsCommandEventArgs
        Autodesk.Revit.UI.EventsBeforeExecutedEventArgs

Namespace: Autodesk.Revit.UI.Events
Assembly: RevitAPIUI (in RevitAPIUI.dll) Version: 26.0.4.0 (26.0.4.0)

Syntax

public class BeforeExecutedEventArgs : CommandEventArgs

Public Class BeforeExecutedEventArgs
	Inherits CommandEventArgs

public ref class BeforeExecutedEventArgs : public CommandEventArgs

type BeforeExecutedEventArgs = 
    class
        inherit CommandEventArgs
    end

The BeforeExecutedEventArgs type exposes the following members.

Properties

	Name	Description
	ActiveDocument	The active document. (Inherited from CommandEventArgs)
	Cancel	Indicates whether the event is being cancelled. When the event is cancellable, set the property to True to cancel it. (Inherited from RevitEventArgs)
	Cancellable	Indicates whether an event may be cancelled by an event delegate. (Inherited from RevitEventArgs)
	CommandId	The command id. (Inherited from CommandEventArgs)
	UsingCommandData	Indicates whether or not the Revit journal will include custom data populated by the application associated with this command.

Methods

	Name	Description
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	ToString	Returns a string that represents the current object. (Inherited from Object)

Remarks

This event is cancellable. If your callback sets the Cancel property to true, the command will not execute.

See Also

Reference

Autodesk.Revit.UI.Events Namespace

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T:Autodesk.Revit.UI.Events.BeforeExecutedEventArgs