ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Desktop.Framework Namespace / OperationManager Class / UndoAsync Method / UndoAsync(String) Method
The category of operation of undo.
Example

In This Topic
    UndoAsync(String) Method
    In This Topic
    Rolls back the most recent operation belonging to a specific category.
    Syntax
    public virtual Task UndoAsync( 
       string category
    )
    Public Overloads Overridable Function UndoAsync( _
       ByVal category As String _
    ) As Task

    Parameters

    category
    The category of operation of undo.

    Return Value

    A task that represents the work queued to execute in the ThreadPool.
    Exceptions
    ExceptionDescription
    Thrown when the operation's ArcGIS.Desktop.Framework.Contracts.Operation.CanUndo method returns false.
    Thrown when the operation's ArcGIS.Desktop.Framework.Contracts.Operation.CanUndo method returns false.
    Remarks

    The most recent operation of a particular category in the stack is undone by calling its ArcGIS.Desktop.Framework.Contracts.Operation.UndoAsync method. The operation is then added to this OperationManager's redo stack.

    Example
    Undo/Redo the Most Recent Operation
    //undo
    if (MapView.Active.Map.OperationManager.CanUndo)
      MapView.Active.Map.OperationManager.UndoAsync();//await as needed
    
    //redo
    if (MapView.Active.Map.OperationManager.CanRedo)
      MapView.Active.Map.OperationManager.RedoAsync();//await as needed
    
    Dockpane undo / redo
    // in order to find a dockpane you need to know it's DAML id
    var pane = FrameworkApplication.DockPaneManager.Find("esri_core_contentsDockPane");
    
    // get the undo stack
    OperationManager manager = pane.OperationManager;
    if (manager != null)
    {
      // undo an operation
      if (manager.CanUndo)
        await manager.UndoAsync();
    
      // redo an operation
      if (manager.CanRedo)
        await manager.RedoAsync();
    
      // clear the undo and redo stack of operations of a particular category
      manager.ClearUndoCategory("Some category");
      manager.ClearRedoCategory("Some category");
    }
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also