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GGC binding to business object and CommandStack

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53019 Dec 7,2006 03:09 AM Dec 8,2006 09:46 AM Windows Forms 2
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Tags: GridControl
Administrator [Syncfusion]
Asked On December 7, 2006 03:09 AM

Hi together,

I am using a GGC which is bound to a business object (BindingList). Now I want to use the CommandStack option for undo and redo operations. So I activated the commandstack via:

ggc.TableModel.CommandStack.Enabled = true;

After I changed a cell value I do the following in my undo method:

if (!ggc.TableModel.CommandStack.InTransaction)
{
ggc.TableModel.CommandStack.Undo();
}

So Undo() is called but the cell value remains. What do I have to implement in my business object to support the commandstack?

Thank's for any help

Cheers,
Tom

Administrator [Syncfusion]
Replied On December 8, 2006 04:05 AM

The GGC does not support the Undo/Redo architecture that is provided by GridControlBase. So, if you want to use this Undo/Redo support, you would have to add custom commands (derived from the abstract GridModelCommand) to manage the actions you want to support. Here is a minimal sample showing one way to handle undo/redo on user changed values. It uses a TableControlCurrentCellValidating to cache the old value, and TableControlCurrentCellAcceptedChanges to create an instance of the custom command and push it on the CommandStack. I also had to manually manipulate the Undo and Redo stacks.

http://www.syncfusion.com/Support/user/uploads/GGC_UndoReDoValueChanged_c430cbee.zip

Administrator [Syncfusion]
Replied On December 8, 2006 09:46 AM

Hi Clay,

nice to "read" from you - Your example is great, thanks a lot.

Cheers

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