Hi Roland,

Once the Add button is pressed you basically have an item in edit mode, which is an EditItem in the grid state. So, you can track the operations of the user and determine whether you want to do something after they have initiated insertion or editing, and that item becomes null, something like this snippet below.

Note that the edit item will become null when Save/Update is pressed too, which is not a cancel operation, so you may want to keep a more careful track of what the user did in order to write up the exact logic you want.

    async void OnStateChangedHandler(GridStateEventArgs<SampleData> args)
    {
        if(args.PropertyName == "EditItem" && args.GridState.EditItem == null)
        {
            Console.WriteLine("done editing");
        }
    }

Regards,
Marin Bratanov
Progress Telerik