public void SetFocusOn(string controlName)
{
var viewUtility = new ViewUtility();
var textBox = viewUtility.FindChild <TextBox>(null, controlName);
if (textBox != null)
{
textBox.Focus(FocusState.Keyboard);
}
else
{
var passwordBox = viewUtility.FindChild <PasswordBox>(null, controlName);
if (passwordBox != null)
{
passwordBox.Focus(FocusState.Keyboard);
}
}
}