Changed Event (UndoManager)

In This Topic

Raised when the Undo stack has changed.

Syntax

Visual Basic
C#

'Declaration
 
Public Event Changed As EventHandler

public event EventHandler Changed

Remarks

This event is raised after an undo or redo operation is performed, as well as after the undo/redo history is cleared. It can be used to update UI elements or perform other actions in response to changes in the report's state.

Example

This example demonstrates how to dynamically update the enabled state of Undo and Redo buttons based on the current state of the UndoManager.

designer.UndoManager.Changed += (sender, e) => {
    _undoButton.Enabled = _designer.UndoManager.UndoCount > 0;
    _redoButton.Enabled = _designer.UndoManager.RedoCount > 0;
};

Reference

UndoManager Class
UndoManager Members