Undo in WPF Bindings

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+3 Q:

Undo in WPF Bindings

How to provide an undo / redo using bindings in WPF?

e.g. You implement a master-detail view with bindings. After editing your changes were saved automatically using binding. Then you want to undo the changes.

Is there something ready-to-use in the binding for WPF? Does WPF provide some structures or interfaces for?

This question is not about how to implement undo/redo using stacks.

+1 A:

What are you databinding to?

If you are databinding to a DataSet you can undo the changes by using the DataSet.RejectChanges() method provided you have not already called DataSet.AcceptChanges().

John Hunter 2009-05-22 09:37:08

What about general binding, e.g. to an object derived from DependencyObject, or control-to-control binding?

Shurup 2009-05-22 09:45:40

As Kent says if the object implements the IEditableObject you are quids in but if not then you need to do this manually.

John Hunter 2009-05-22 10:40:51

+3 A:

Take a look at the IEditableObject interface. It allows you to take a snapshot of the object that implements it, and then roll back to that snapshot if necessary.

HTH, Kent

Kent Boogaart 2009-05-22 09:51:01

Does WPF use the IEditableObject interface, i.e. invokes its methods?

Michael Damatov 2009-05-22 10:00:17

It's up to the particular control you're using. For example, the MS DataGrid control will.

Kent Boogaart 2009-05-22 10:05:32

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