What happens on DataRow.EndEdit

[Allan Bredahl]

Hi All

I have a bit of a problem with using a datarow to store data that is show in
a form.
On form load I set the Value/Text properties of my form elements to the
specific Column values of the DataRow which works just fine.
On form close I assign the specific DataRow Column values to the value of
the form elements, to update the datarow to the newest values.
The problem is that even if I make no changes to the form the DataRow is
changed afterwards no matter what.

The ColumnChanging event is not raised on my datatable, but as soon as I
call the EndEdit method on the datarow, the RowChanged event is raised on
the DataTable.
Even if I make no assignments to the Row values on form close, the
RowChanged event is raised anyhow.

Is this a normal behavior of the datatable to always see the row as changed
if EndEdit is called ??
I'm a bit confused.
Tanks in advance
Allan

[Miha Markic]

Hi Allan,

Yes, calling EndEdit (after BeginEdit) will set row state as changed and
invoke RowChanged/ing events.
You might consider using CancelEdit or not to use Begin/End/Cancel edit
mechanism though.

--
Miha Markic - RightHand .NET consulting & software development
miha at rthand com
www.rthand.com

"Allan Bredahl" <[e-mail]> wrote in message
news:%2****************@TK2MSFTNGP11.phx.gbl...

Hi All

I have a bit of a problem with using a datarow to store data that is show in a form.
On form load I set the Value/Text properties of my form elements to the
specific Column values of the DataRow which works just fine.
On form close I assign the specific DataRow Column values to the value of
the form elements, to update the datarow to the newest values.
The problem is that even if I make no changes to the form the DataRow is
changed afterwards no matter what.

The ColumnChanging event is not raised on my datatable, but as soon as I
call the EndEdit method on the datarow, the RowChanged event is raised on
the DataTable.
Even if I make no assignments to the Row values on form close, the
RowChanged event is raised anyhow.

Is this a normal behavior of the datatable to always see the row as changed if EndEdit is called ??
I'm a bit confused.
Tanks in advance
Allan

[Allan Bredahl]

Thanks a lot for the answer...
Isn't that behavior quite odd ?

I consider the DataRow as changed when its content has changed, not when I
stop editing it.
Hmm, that means that I have to do a manual comparison on all my DataRow
columns and only call EndEdit if anything is changed.

That seams a bit stupid to me :-)

thanks

Allan
"Miha Markic" <miha at rthand com> skrev i en meddelelse
news:uJ**************@TK2MSFTNGP09.phx.gbl...

Hi Allan,

Yes, calling EndEdit (after BeginEdit) will set row state as changed and
invoke RowChanged/ing events.
You might consider using CancelEdit or not to use Begin/End/Cancel edit
mechanism though.

[Miha Markic]

Isn't that behavior quite odd ?

I consider the DataRow as changed when its content has changed, not when I
stop editing it.
Hmm, that means that I have to do a manual comparison on all my DataRow
columns and only call EndEdit if anything is changed.

That seams a bit stupid to me :-)

Yes, it might be better :)

--
Miha Markic - RightHand .NET consulting & software development
miha at rthand com
www.rthand.com