Focus on TextBox when UserControl change Visibility

Question

I have a usercontrol loaded inside a canvas; this usercontrol on default have visibility collapsed. When a specific textbox of my window is focused the usercontrol become visible.

When usercontrol become visible I want set focus to another textbox inside usercontrol.

I try to do that:

private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
        if (this.Visibility == Visibility.Visible)
        {                
            FocusManager.SetFocusedElement(this, TextBlockInput);
        }
}

It seems work but there is a problem: the textbox seems focused but the cursor into textbox don't blink and I can't type chars for input.

I would that after focus the textbox is ready for input. How can I do?

Luca Petrini · Accepted Answer · 2010-08-25T10:30:33.743

42

Well, I solve in this way:

private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
    if (this.Visibility == Visibility.Visible)
    {
        this.Dispatcher.BeginInvoke((Action)delegate
        {
            Keyboard.Focus(TextBlockInput);
        }, DispatcherPriority.Render);
    }
}

I think that the problem was tha focus call into IsVisibleChanged event "scope"...right?

edited Aug 25 '10 at 10:30

answered Jun 25 '10 at 10:08

Luca Petrini

1,695
2
28
53

Was trying to solve this problem since this morning .... you saved my evening :-) Thanks so much!! – Cris Aug 04 '11 at 15:31

score 1 · Answer 2 · answered Jun 24 '10 at 10:29

1

try

Keyboard.Focus(TextBlockInput);

see here for more details

answered Jun 24 '10 at 10:29

Arsen Mkrtchyan

49,896
32
148
184

I tried but worse...with Keyboard.Focus(myTextBox) or myTextBox.Focus() seems that textbox is not focused...don't see the cursor. – Luca Petrini Jun 24 '10 at 13:04
is it an standard TextBox? or some third part control? – Arsen Mkrtchyan Jun 25 '10 at 05:05
I've posted my solution...thanks for help, seems that the problem was the focus call into IsVisibleChange event – Luca Petrini Jun 25 '10 at 10:10

score -1 · Answer 3 · answered May 19 '15 at 13:36

-1

Another possible workaround is instead of Visibility property use Opacity. In this case calling Focus() actually sets focus.

answered May 19 '15 at 13:36

Pavels Ahmadulins

430
5
16

1

It is a bad advice: `Visilibity.Collapsed` is very different than `Opacity=0`. Logical/keyboard focus, mouse events firing, theming, everything is different. `Opacity`is about aesthetics, `Visibility` is about the visual tree. – Askolein Mar 09 '19 at 16:41
@Askolein As stated in my reply, it's a workaround, not a proper solution. – Pavels Ahmadulins Mar 10 '19 at 12:48

Focus on TextBox when UserControl change Visibility

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