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GC: Undo/Redo

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62730 Jun 21,2007 01:57 AM UTC Jun 21,2007 03:26 AM UTC Windows Forms 1
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Tags: GridControl
Richard Bysouth
Asked On June 21, 2007 01:57 AM UTC

Hi

I'm in the process of migrating from a different grid to your GridControl. For the other grid control I had to write my own command classes to handle applying fonts/colours etc. to a selected range, and to provide my own undo/redo functionality.
I would like to use the built-in undo/redo but am not sure as to whether I need to create my own classes again, inheriting from GridModelCommand. I've looked at the UndoRedoSample and I think that works fine for me, but I need to be able to set the description for each type of command.

For example, if I set the font colour for a range of cells, I would like to display "Font Colour" in the undo list, rather than "Change Cells R5C2..." But how can I determine what was changed from the GridChangeCellsCommand?

hope that makes sense!

thanks

Richard

Richard Bysouth
Replied On June 21, 2007 03:26 AM UTC

Actually, I've just answered this myself!

I just need to use a transaction for each command. This makes things so easy!

For example:

grid.CommandStack.BeginTrans("Font Color")

Dim cellInfo As New GridStyleInfo

cellInfo.TextColor = dlg.Color

'Apply the settings to the current selection
grid.ChangeCells(selectedRange, cellInfo)

grid.CommandStack.CommitTrans()

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