How to keep focus on the cell after finish editing in datagrid in WPF?

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Hi people.
I have a DataGrid in WPF which name is "MyDataGrid"
It has 10 rows and 5 columns of data, and all of them are editable.
So whenever the user edits a cell, after pressing Enter, the focus will go to next row.
Please kindly help me that how may I disable this?
I mean how can I avoid the focus to go to next row, and keep that on the edited cell ?
Thanks.

What I have tried:

I couldn't find any solution sample yet.

Posted 11-May-24 20:36pm

Sh.H.

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Jo_vb.net · Answer 1 · 2024-05-12T07:31:00

Solution 1

Try to use

KeyEventArgs.Handled = true;

https://stackoverflow.com/questions/32692723/wpf-datagrid-how-to-prevent-auto-change-row-on-enter-key-pressed[^]

Posted 12-May-24 7:31am

Jo_vb.net

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Sh.H. 12-May-24 14:13pm

@Jo_vb.net
Thanks for reply.
Doesn't work.
Gives me exception.

Private Sub myDataGrid_CellEditEnding(sender As Object, e As DataGridCellEditEndingEventArgs) Handles myDataGrid.CellEditEnding
    KeyEventArgs.Handled = True
End Sub

Also I tried

e.Handled = True

but also did not work.

Jo_vb.net 12-May-24 17:24pm

You mixed DataGridCellEditEndingEventArgs and KeyEventArgs

My link to SO shows this:

private void PreviewKeyDown(object sender, KeyEventArgs e)
{
if ((e.Key.Equals(Key.Enter)) || (e.Key.Equals(Key.Return)))
{
e.Handled = true;
}
}

And use the related handler for PreviewKeyDown event !

Sh.H. 13-May-24 2:29am

@Jo_vb.net
I did what you shared in reply.
Now the problem is, when the user finishes editing on a cell, after pressing Enter, the cell is still in editing mode, and the user must use mouse clicking on another cell to finalize the editing. So I think disabling "Enter" is not a good idea.

Jo_vb.net 13-May-24 5:42am

You could try:

{
var selectedRow = myDataGrid.SelectedItem;

myDataGrid.CommitEdit(DataGridEditingUnit.Row, true);
myDataGrid.SelectedItem = selectedRow;

e.Handled = true;
}

Sh.H. 13-May-24 6:42am

@Jo_vb.net
Not worked.
This time, no keys able to press!
I mean when I start to type, the editing mode will close and cell goes empty.

Jo_vb.net 13-May-24 6:47am

I meant the "if ((e.Key.Equals(Key.Enter)) || (e.Key.Equals(Key.Return)))" is still there?

if ((e.Key.Equals(Key.Enter)) || (e.Key.Equals(Key.Return)))
{
var selectedRow = myDataGrid.SelectedItem;

myDataGrid.CommitEdit(DataGridEditingUnit.Row, true);
myDataGrid.SelectedItem = selectedRow;

e.Handled = true;
}

Sh.H. 13-May-24 8:35am

@Jo_vb.net
Worked!
Thanks.

But now, my workmate says:
It is much faster for user to use Enter to come down to next cell.
He means that, when cell is in editing mode, the Enter key is just for finalizing data into cell.
But when no cells are in edit mode, the Enter key should work like everyday, I mean going to next cell.
So could you please kindly do me favor and help me on this also?
Thank you.

Jo_vb.net 13-May-24 9:06am

Well this would be a new question.

But you can try if press the tab key instead of the enter key does the trick.

Sh.H. 13-May-24 9:27am

@Jo_vb.net
Dear Jo!
With respect, I should say the previous code that I accepted, is NOT accepted yet.
I checked the 'List' which is binded to the DataGrid. None of cells updated in the list!
But when I remove the PreviewKeyDown from codes, all entered data will update to the list after hitting Enter.

Jo_vb.net 13-May-24 9:56am

Well this ( update to the list) only works with enter key when you leave the edited row.
And if you use MVVM things are more complicate.
https://blogs.u2u.be/diederik/post/Inserting-Updating-and-Deleting-from-a-WPF-DataGrid

Perhaps someone else here has a better idea?

Sh.H. · Answer 2 · 2024-05-14T01:46:00

I found this way, not as a solution, but it works.

VBScript

Private Sub DGEditing_CellEditEnding(sender As Object, e As DataGridCellEditEndingEventArgs) Handles DGEditing.CellEditEnding
    Dim editedElement As FrameworkElement = TryCast(e.EditingElement, FrameworkElement)
    If editedElement IsNot Nothing Then editedElement.MoveFocus(New TraversalRequest(FocusNavigationDirection.Up))
End Sub

So I set FocusNavigationDirection to Up.
When the user finishes editing and press Enter, the focus will go down, and immediately goes up. So what the user see is the focus is still on the cell.

So the problem is as I have sub for event CurrentCellChanged, unfortunately with this code I wrote here, it fires two times. So anybody has any idea to improve this code?