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How to implement Undo feature in ImageMap mode? (Read 1168 times)

geanyee YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 9 Joined: Feb 12^th, 2010	How to implement Undo feature in ImageMap mode? Feb 21^st, 2010 at 8:39am	Print Post
	The ClientSideMode is "ImageMap", and placed the diagram in a updatepanel control, sure the UndoEnabled property is set to "true". Here are two buttons, one is create a createCmd and add history to UndoManager, another is a undo button, it invokes undomanager.Undo method, but there is nothing to happen, and the command length of history equals to zero. I don't know what's the problem. btw, i researched this problem is BBS, and find this post: http://mindfusion.eu/Forum/YaBB.pl?board=netdg_disc;action=display;num=122347087... but that problem is Javaapplet not ImageMap, so please tell me how to solve my problem. thanks in advance.


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: How to implement Undo feature in ImageMap mode Reply #1 - Feb 22^nd, 2010 at 9:29am	Print Post
	I'm afraid undo/redo is supported only in JavaApplet mode (also in Silvelright mode in the upcoming version 3.1). The server side API has UndoManager and carries out a lot of operations through the Command classes, however the commands are not saved in the viewstate and are lost between postbacks. I guess we can make the commands serializable and save the undo/redo history too for the next release after V3.1. Stoyan


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