How to implement undo/redo of files mapped in a treeview

618

Can anyone give an idea of how should I implement undo/redo of files (dirs, subdirs) mapped in a treeview - C#?

Would be great some code samples

+3 A:

Undo / redo is typically implemented using the so-called "command pattern". Search with Google or read the following article:

http://blogs.vbcity.com/jspano/articles/198.aspx

0xA3 2008-12-15 11:39:50

+1 for a Good answer, but no idea if it answers the question :)

Robert Gould 2008-12-15 11:46:15

I also have no idea whether it answers the question ;-)

0xA3 2008-12-15 12:00:40

with the new subject, do you understand the question?

Cornel 2008-12-15 13:43:28

No. What are the actions that you want to do/undo?

0xA3 2008-12-15 16:38:46

P.S.: Your subject simply repeats now what was already written in the first sentence.

0xA3 2008-12-15 16:39:25

The TreeView can Cut/Copy/Paste mapped files. Undo/Redo should also be supported. Understood?

Cornel 2008-12-16 07:30:15

+4 A:

Consider implementing Command pattern (GoF):

Put your actions logic into classes which implement common ICommand {Do(); Undo();} interface.
On each user action you create object of command requested and initialize it with context parameters like new and old filename.
Call Do(), put object into stack of completed commands.
Each command is supplied with context, so by calling Undo() it can reverse changes.
Consider moving files into temporary folder instead of removals.

Ihar Voitka 2008-12-15 11:52:08

For a quick linear undo/redo, you can use Memento pattern using zip of file as memento.

eed3si9n 2008-12-15 11:52:21

ansaurus