Hello Sodi We,
When "ValidatesOnDataErrors" is set to InViewMode then data validation usually via INotifyDataErrorInfo and IDataErrorInfo interfaces will be performed only when cell is in view mode. This means that when cell is in edit mode data validation will not be performed. The default value of this property is both InViewMode and InEditMode.
Unfortunately I cannot simulate the problem related to ActionOnLostFocus. Maybe the row editing is canceled because in any reason focus leaves this new row. New row has its own ActionOnLostFocus and if it is not set gets the value from RadGridView.ActionOnLostFocus.
I hope this will help.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items