Methods Reference for Registering and Unregistering Objects

Topic Overview

This topic lists the methods that register/unregister a specific object to an UndoManager instance.

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 Undo/Redo Framework™ provides methods for registering/unregistering objects to an UndoManager instance.

The following table summarizes the purpose and functionality of the methods for registering/unregistering objects.

Methods	Description
FromReference	This static method obtains a reference to the associated UndoManager instance. The method takes an already registered object as a parameter.
RegisterReference	Associates an object with a specific `UndoManager` instance. This method is helpful when you do not want to maintain an object strong reference to an `UndoManager` instance you do not want to use the shared thread static UndoManager instance returned by the Current property The references are maintained via weak references so it is not mandatory to unregister them.
UnregisterReference	Removes the registration of an object to an `UndoManager` instance.

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