Very Computer

by **Mitc** » Sat, 08 Jun 2002 06:08:11

I have a form with a textbox, two user controls and an OK button. Each user
control has a button and a dataGrid. When the focus moves to the user
control, the tabbing behavior inside the user control is unpredictable.
sometimes the focus goes to the button, then the datagrid, and sometimes the
focus goes to the button, then out of the control. I am explicitly setting
the tabindex values for each control, An I've also set the Z-orders but to
know avail.

Can someone explain how to control how the focus moves when the tab key is
pressed.

Thanks

Mitch

by **Jens Grusche** » Sat, 08 Jun 2002 16:34:11

Quote:> Can someone explain how to control how the focus moves when the tab key is
> pressed.

Don't know for sure, but maybe this helps: Create a descendant of
UserControl and add following code:

protected override bool ProcessTabKey(bool forward)
{
bool r = false;
if (this.ActiveControl != null) r =
this.SelectNextControl(this.ActiveControl,forward,true,true,false);
if (!r) r = this.Parent.SelectNextControl(this,forward,true,true,false);
// last parameter might also be true
return r;

Quote:}

Jens

by **Laurie Pauli** » Sat, 08 Jun 2002 17:45:10

I have a similar problem when there is a user control within a user control
on a form. I (and others) have reported this several times with no reponse
from MS. The solution for me was to only have the UC on an inherited form,
i.e. reduce the number of levels.

It seems like this is a bit different from your problem as you only have one
level but it is becoming apparent that there are problems with tabs and UC.
As SP2 is slated for Sep this year, you may have to re-architect your app.

Laurie Paulin
Perth, Western Australia

Quote:> I have a form with a textbox, two user controls and an OK button. Each
user
> control has a button and a dataGrid. When the focus moves to the user
> control, the tabbing behavior inside the user control is unpredictable.
> sometimes the focus goes to the button, then the datagrid, and sometimes
the
> focus goes to the button, then out of the control. I am explicitly setting
> the tabindex values for each control, An I've also set the Z-orders but to
> know avail.

> Can someone explain how to control how the focus moves when the tab key is
> pressed.

> Thanks

> Mitch

by **Jens Grusche** » Sat, 08 Jun 2002 18:39:17

Maybe this one is better - and more easy to understand. To be honest, I
don't know any more why I added the additional logic, it seems to work
without it.

protected override bool ProcessTabKey(bool forward)
{
return this.Parent.SelectNextControl(this,forward,true,true,false);

Quote:}

Maybe you might also want to override OnGotFocus and/or the Focused
property.

Jens

by **Jens Grusche** » Sat, 08 Jun 2002 18:52:43

It's me again. Take the first code I posted. The second one does only work
when not more than one control is child of your user control.

Jens

by **Mitc** » Sun, 09 Jun 2002 06:29:51

Actually, the user control I mentioned is in another user control. I didn't
mention that initially because I wanted to keep the question simple. So it
sounds like MS has some bugs to fix in this area.

Have you tried any of Jens suggested code. Does it help the control within a
control problem.

Thanks.

Mitch

> I have a similar problem when there is a user control within a user
control
> on a form. I (and others) have reported this several times with no
reponse
> from MS. The solution for me was to only have the UC on an inherited
form,
> i.e. reduce the number of levels.

> It seems like this is a bit different from your problem as you only have
one
> level but it is becoming apparent that there are problems with tabs and
UC.
> As SP2 is slated for Sep this year, you may have to re-architect your app.

> Laurie Paulin
> Perth, Western Australia

> > I have a form with a textbox, two user controls and an OK button. Each
> user
> > control has a button and a dataGrid. When the focus moves to the user
> > control, the tabbing behavior inside the user control is unpredictable.
> > sometimes the focus goes to the button, then the datagrid, and sometimes
> the
> > focus goes to the button, then out of the control. I am explicitly
setting
> > the tabindex values for each control, An I've also set the Z-orders but
to
> > know avail.

> > Can someone explain how to control how the focus moves when the tab key
is
> > pressed.

> > Thanks

> > Mitch

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