UndoTransactionState Enumeration

Holds the state of the transaction.

Namespace: Microsoft.VisualStudio.Text.Operations
Assembly: Microsoft.VisualStudio.Text.Logic (in Microsoft.VisualStudio.Text.Logic.dll)

Syntax

'宣告
Public Enumeration UndoTransactionState

public enum UndoTransactionState

public enum class UndoTransactionState

type UndoTransactionState

public enum UndoTransactionState

	Member name	Description
	Open	The initial state of the transaction, after it has been created and before it is canceled or completed.
	Completed	The transaction is no longer being defined, and is eligible for undo.
	Canceled	The transaction is no longer being defined, but has been aborted and cleared.
	Redoing	A transient state set by the Do operation, between the undone state and the completed state.
	Undoing	A transient state set by the Undo operation, between the completed state and the undone state.
	Undone	The Undo operation was called after completion.
	Invalid	The transaction has been removed from the undo history stack, for example because it was on the redo stack when a new operation cleared the redo stack. After a transaction is invalid, it should not be used for anything.

There are five transaction state:

Open transactions are being defined.
Canceled transactions have been aborted and are empty.
Completed and undone transactions have been defined and are ready for undo and redo, respectively.
Undoing and redoing are transient states as the transaction passes between completed and undone.
Invalid is a state for transactions that have expired.