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
  - AddInCommandBinding Class
  - ButtonData Class
  - ColorSelectionDialog Class
  - ComboBox Class
  - ComboBoxData Class
  - ComboBoxMember Class
  - ComboBoxMemberData Class
  - CommandMenuItem Class
  - ContextMenu Class
  - ContextualHelp Class
  - ContextualHelpType Enumeration
  - DockablePane Class
  - DockablePaneId Class
  - DockablePaneProviderData Class
  - DockablePanes Class
  - DockablePanes.BuiltInDockablePanes Class
  - DockablePaneState Class
  - DockPosition Enumeration
  - DoubleClickAction Enumeration
  - DoubleClickOptions Class
  - DoubleClickTarget Enumeration
  - EditorInteraction Class
  - EditorInteractionType Enumeration
  - ExternalApplicationArray Class
  - ExternalApplicationArrayIterator Class
  - ExternalCommandData Class
  - ExternalCommandsData Class
  - ExternalEvent Class
  - ExternalEventRequest Enumeration
  - FaceBasedPlacementType Enumeration
  - FamilyInstancePlacingArgs Class
  - FileDialog Class
  - FileOpenDialog Class
  - FileSaveDialog Class
  - FilterDialog Class
  - IContextMenuCreator Interface
  - IControllableDropHandler Interface
  - IDockablePaneProvider Interface
  - IDropHandler Interface
  - IExternalApplication Interface
  - IExternalCommand Interface
  - IExternalCommandAvailability Interface
  - IExternalEventHandler Interface
  - IExternalResourceUIServer Interface
  - IFCExternalServiceUIData Class
  - IFrameworkElementCreator Interface
  - IIFCEntityTreeUIServer Interface
  - IRevisionsOnSheetUIServer Interface
  - ItemData Class
  - ITemporaryGraphicsHandler Interface
  - ItemSelectionDialogResult Enumeration
  - MenuItem Class
  - PostableCommand Enumeration
  - PreviewControl Class
  - ProjectBrowserOptions Class
  - PromptForFamilyInstancePlacementOptions Class
  - PulldownButton Class
  - PulldownButtonData Class
  - PushButton Class
  - PushButtonData Class
  - RadioButtonGroup Class
  - RadioButtonGroupData Class
  - Result Enumeration
  - RevisionsOnSheetUIServiceData Class
  - RevitCommandId Class
  - RevitLinkUIUtils Class
  - RibbonButton Class
  - RibbonButtonOptions Class
  - RibbonItem Class
  - RibbonItemData Class
  - RibbonItemType Enumeration
  - RibbonPanel Class
  - ScrollbarVisibility Enumeration
  - SelectionUIOptions Class
  - SeparatorItem Class
  - SketchGalleryOptions Enumeration
  - SplitButton Class
  - SplitButtonData Class
  - SubMenuItem Class
  - Tab Enumeration
  - TabbedDialogAction Delegate
  - TabbedDialogExtension Class
  - TableViewUIUtils Class
  - TaskDialog Class
  - TaskDialogCommandLinkId Enumeration
  - TaskDialogCommonButtons Enumeration
  - TaskDialogIcon Enumeration
  - TaskDialogResult Enumeration
  - TemporaryGraphicsCommandData Class
  - TextBox Class
  - TextBoxData Class
  - TextEditorOptions Class
  - ThemeType Enumeration
  - ThinLinesOptions Class
  - ToggleButton Class
  - ToggleButtonData Class
  - UIApplication Class
  - UIControlledApplication Class
  - UIDocument Class
  - UIFabricationUtils Class
  - UISaveAsOptions Class
  - UITheme Enumeration
  - UIThemeManager Class
  - UIView Class
- Autodesk.Revit.UI.Events
- Autodesk.Revit.UI.Macros
- Autodesk.Revit.UI.Mechanical
- Autodesk.Revit.UI.Plumbing
- Autodesk.Revit.UI.Selection
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ExternalCommandData Class

Revit 2026 API

ExternalCommandData Class

A class contains reference to Application and View which are needed by external command.

Inheritance Hierarchy

SystemObject
Autodesk.Revit.DBAPIObject
Autodesk.Revit.UIExternalCommandData

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

Syntax

public class ExternalCommandData : APIObject

Public Class ExternalCommandData
	Inherits APIObject

public ref class ExternalCommandData : public APIObject

type ExternalCommandData = 
    class
        inherit APIObject
    end

The ExternalCommandData type exposes the following members.

Properties

	Name	Description
	Application	Retrieves an object that represents the current Application for external command.
	IsReadOnly	Identifies if the object is read-only or modifiable. (Inherited from APIObject)
	JournalData	A data map that can be used to read and write data to the Autodesk Revit journal file.
	View	Retrieves an object that represents the View external command work on.

Methods

	Name	Description
	Dispose	Causes the object to release immediately any resources it may be utilizing. (Inherited from APIObject)
	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)

See Also

Reference

Autodesk.Revit.UI Namespace

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T:Autodesk.Revit.UI.ExternalCommandData