Implementing Undo/Redo Functionality in .NET

This guide explains how to use Undo/Redo functionality using snapshots, a recovery service, and commands.
Follow these steps to integrate it into your application:

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1. Create a Snapshot for Your Model

First, you need to create snapshots representing the state of your model for both undo and redo operations:

    undoSnapshot = new AClassSnapshot() { Value = model.Value };
    model.Value = 34;
    redoSnapshot = new AClassSnapshot() { Value = model.Value };

2. Create a Recovery Service for the Snapshot

Next, create a recovery service that knows how to restore a snapshot to your model:

    recoverService = new AClassRecoverService(model);

3. Create an Undo/Redo Command

Using the snapshots and recovery service, create a command to handle undo and redo operations:

command = new UndoRedoCommand<AClassSnapshot>(undoSnapshot, redoSnapshot, recoverService);

4. Add the Command to the Undo/Redo Service

Register the command with your undo/redo service for execution:

UndoRedoService.Instants.Value.AddCommand(command);

5. Execute Undo/Redo Commands

Finally, execute the undo and redo commands as needed:

UndoRedoService.Instants.Value.Undo();

UndoRedoService.Instants.Value.Redo();

Below is a visual representation of how the Undo/Redo execution process works: