| Name | Description | |
|---|---|---|
 | NHistoryService Constructor | Initializer constructor |
NevronOpenVision
The following tables list the members exposed by NHistoryService.
| Name | Description | |
|---|---|---|
| NHistoryService Constructor | Initializer constructor |
| Name | Description | |
|---|---|---|
  | NHistoryServiceSchema | Schema associated with NHistoryService |
| RedoExecutedEvent | Reference to the RedoExecuted event |
| TransactionCommitedEvent | Reference to the TransactionRolledback event |
| TransactionRolledbackEvent | Reference to the TransactionRolledback event |
| TransactionStartedEvent | Reference to the TransactionStarted event |
| UndoExecutedEvent | Reference to the UndoExecuted event |
| UnitRecordedEvent | Reference to the UnitRecorded event |
| Name | Description | |
|---|---|---|
 | IsRedoing | Determines whether the history service is currently redoing an unit |
| IsUndoing | Determines whether the history service is currently undoing an unit |
| IsUndoingOrRedoing | Determines whether the history service is currently undoing or redoing an unit |
| MaxUndoLevels | Controls the max depth of the undo stack. Setting this property will automatically clear the extra units in the undo stack. By default set to 100. |
| OwnerDocument | Gets the resolving document. The resolving document is the root document monitored by this history service. |
| RedoStack | Gets the Redo units stack |
| TransactionStack | Gets the Transaction units stack |
| UndoStack | Gets the Undo units stack |
| UndoStackDepth | The current undo stack depth. Note that this value may be different than the count of items in the UndoStack, since the UndoStack depth cannot exceed MaxUndoLevels. |
| Name | Description | |
|---|---|---|
 | CanRecord | Determines whether a new unit can be recorded. The history cannot record any unit if it is not in started state, or is currently undoing or redoing an unit. |
| CanRedo | Determines whether the user can perform Redo. |
| CanUndo | Determines whether the user can perform Undo. |
| CommitTransaction | Commits the last started transaction. |
| DumpRedoStackToObjectsList | |
| DumpToListBoxes | Dumps the state of the undo and redo stacks in the specified ListBox instances. |
| DumpToTreeViews | Dumps the state of the undo and redo stacks in the specified TreeView instances. |
| DumpUndoStackToObjectsList | |
| Record | Records the specified unit. If there are no started transactions, the unit is pushed in the undo stack and the redo stack is cleared. It there is a started transaction, the unit is appended as a child unit of the transaction unit. |
| Redo | Redoes the peak unit from the redo stack and pushes in the undo stack. |
| RollbackTransaction | Rolls back the currently started transaction and undoes the effect of the units recorded in it. |
| StartTransaction | Overloaded. Starts a new history transaction. Transactions are units, which are pushed in the transaction stack and their recording is suspended until the CommitTransaction method is called. |
| Undo | Undoes the peak unit from the undo stack and pushes in the redo stack. |
| Name | Description | |
|---|---|---|
 | OnRedoExecuted | Called when an unit has been successfully redone |
| OnStoped | Overridden. Overriden to clear the state of the history service |
| OnTransactionCommited | Called when a transaction has been commited |
| OnTransactionRolledback | Called when the last started transaction has been rolled back |
| OnTransactionStarted | Called when a transaction has been started |
| OnUndoExecuted | Called when an unit has been successfully undone |
| OnUnitRecorded | Called whenever an unit has been recored in the undo stack |
| Name | Description | |
|---|---|---|
 | RedoExecuted | Occurs when redo is executed |
| TransactionCommited | Occurs when a transaction has been commited |
| TransactionRolledback | Occurs when a transaction has been rolled back |
| TransactionStarted | Occurs when a transaction has been started |
| UndoExecuted | Occurs when undo is executed |
| UnitRecorded | Occurs when a new unit has been recorded |
