Hi Adrian,
Thanks for your interest in Syncfusion products.
I'm afraid that i didn't understand the issue.
The cellvalidating event getting fired once i click a button from the cell before the grid validating event fires.
Please try the sample in the following link:
http://websamples.syncfusion.com//samples/Grid.Windows/F77398/main.htmIf this is not the one what u expect, please send us a sample implementing the issue for better understanding.
Regards,
Rajadurai