Question

I have an user control with Focusable=true and IsTabStop=true.

I can focus it using Tab key. but I need to focus it from code.

I tried uc.Focus() and Keyboard.Focus(uc) but it doesn’t work.

Answer 1

Tejas is probably correct. If WPF is doing some rendering/layout update, you want to postpone the .Focus() task a little and not get in WPF’s way. Try this:

using System.Windows.Threading;

...

Action focusAction = () => uc.Focus();
this.Dispatcher.BeginInvoke(focusAction, DispatcherPriority.ApplicationIdle);