Methods Reference for Removing UndoUnits from the History

Topic Overview

This topic lists the available methods for removing the UndoUnit instances from the undo/redo history.

The following table lists the topics required as a prerequisite to understanding this topic.

Topic	Purpose
UndoManager Properties and Methods Reference	This topic lists some of the important properties and methods of the UndoManager class.

This topic contains the following sections:

The UndoManager class exposes methods for removing UndoUnit instances from the history.

The following table summarizes the purpose and functionality of the methods that removes items from the undo/redo history.

Method	Description
ClearHistory	Removes all items in the undo and redo history.
RemoveAll	Removes all specified `UndoUnit` instances from the `UndoHistory` and RedoHistory collections. If the UndoUnit is a member of an UndoTransaction and it is the last unit in the transaction, the transaction will be removed as well.

The following topics provide additional information related to this topic.

Topic	Purpose
Methods Reference for Adding UndoUnits to the Undo History	This topic lists the available methods for adding an UndoUnit derived class object to the undo history.
Methods Reference for Registering and Unregistering Objects	This topic lists the methods that register/unregister a specific object to an UndoManager instance.
Methods Reference for Performing Undo Redo Operations	This topic lists the available methods for performing undo and redo operations.
Methods and Properties Reference for Performing Transactions	This topic lists the available methods and properties for performing undo/redo transactions.
Methods and Properties Reference for Merging Undo Redo Operations	This topic lists the available methods and properties related to the merging of undo/redo operations.
Methods Reference for Suspending and Resuming Saving History	This topic lists the available methods for suspending and resuming the saving of the undo/redo operations in history.
Methods and Properties Reference for Creating Custom UndoUnit	This topic lists the available methods and properties related to creating of a custom UndoUnit in the Infragistics Undo/Redo Framework™.