How to check for changes on the BindingSource and cancel them

[Shimmy613]

I'm sure this question has been asked and answered a million times, but I've been Googling and can't come up with an answer that works for me...

I've got a bunch of UI controls wired up to a BindingSource. I've got the databinding set up to update the objects on PropertyChanged. I need to now implement a "cancel button" - but I can't find any way that works (EndEdit, EndCurrentEdit, CancelEdit, etc.) to roll back the changes - or to even view the old values in the debugger. I've tried the "BindingSource_CurrentChanged" and "BindingSource_CurrentItemChanged" events with no success - it seems the original values are gone.

I know I could manually create a full copy of the object at the beginning and then create a whole manual compare function - but that seems pretty poor...

Any ideas, please?

Thanks!!!

 

[Shimmy613]

Slight (but insignificant correction) - the databinding's "Data Source Update Mode" is set to OnValidation, not OnProperyChanged, like I wrote above.

 

[Shimmy613]

This:

http://www.pcreview.co.uk/forums/canceledit-bindingsource-t2897605.html

seems to say that I need to implement IEditableObject, which in turn forces me to write my own BeginEdit, EndEdit and CancelEdit. So that's just an official way of getting this task done manually...