CODEWITHSUNDEEP
c#.netwinformseventsdatagridview
Inno
Inno

Reputation: 2567

How to get cell value change when closing form?

I have a form with a DataGridView on it.

In this DataGridView there is a DataGridViewComboBoxColumn. When changing the value of a cell of this DataGridViewComboBoxColumn, the CellValueChanged-event is only fired when leaving the cell (for example, if I click into another cell). The event is not fired when I change the value and then just close the form.

So, how can I save the changes (if there are any changes), if my form is simply closed?

[UPDATE]

The CellValueChanged is not fired when the form the DataGridView is on is shown through form.ShowDialog():

using (FormWithDataGridView form = new FormWithDataGridView()) {
    form.ShowDialog();   // DataGridView on form fires no CellValueChanged-Event when form gets closed
}

Upvotes: 1

Views: 2465

Answers (3)

Sting
Sting

Reputation: 342

Ran into a similar situation myself, but with the last checkbox updated programmatically--whouldn't update unless I switched rows.

Try calling the BindingSource.EndEdit method just before you update the combobox.

For me I call the data adapter afterwards and it recognizes a change to the datagridview--so it does the work.

Upvotes: 0

Jeff Ogata
Jeff Ogata

Reputation: 57783

From the community content post on the MSDN entry for ShowDialog, when you close a modal form, it is just being hidden so the calling code can still have access to the DialogResult or other properties of the form. Apparently, this is why the CellValueChanged event on the DataGridView is not firing (CellParsing and CellEndEdit events also do not get raised).

As a workaround, in the form closing event, you can remove focus from the DataGridView, which will cause the CellValueChanged event to fire if necessary. If you don't have any other controls on the form to set focus to, you can put a label on the form and give it focus.

Upvotes: 3

Mikael
Mikael

Reputation: 453

have you tried using dataGridView1.CellParsing? This should (as I understand it) trigger even if the focus of the cell is lost due to closing the containing Form. This will only trigger if the user has changed the value of the cell.

[Edit] Now when I think about it a bit more I would try dataGridView1.CellEndEdit if I was you. That is better..[/Edit]

Upvotes: 0

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