howto cancel bindingnavigator "+" action

[dl]

Hi

I have built a form by dragging a dataset over onto the designer, then I got
this BindingNavigator for free. But I found whenever the user clicked either
the "move first" or the "move previous" button right after he/she had clicked
the "+" button without committing the "add new" action, the system throw a
NoNullException error. How do I Cancel this "+" action gracefully please?

TIA

[John Bundy]

It all depends, if you go to your .xsd (right click data source, configure in
designer) you can do many things:
Have it throw no exception
create a row change event that deletes the row if it is blank before they move

better:

set an autoincrementing column so there is always data, then change the
update to only update if other columns are not blank
create a form that they will use to enter info, then a button that appends
that to the datagrid

--
-John http://www.jmbundy.blogspot.com/
Please rate when your question is answered to help us and others know what
is helpful.

[dl]

tks. But is there something we can do on the client side as soon as the user
click a button?

[dl]

Sorry I missed this "row change event", but where can I find this "row change
event" please?!

[dl]

Sorry that I missed this "row change event". But where can I find this
event, please?
I have a detail view of the dataset instead of a datagridview!

TIA

[dl]

Thanks John
I found the way to override the default action for the movefirst button, and
call the canceledit in that click event; however, I am having some problem
with the autonumber field after the canceledit, please see my new post in
this same group!