Question

I have a WPF combobox…which is non-editable. When I tab into this combobox…I have a style setter (<Setter Property="IsDropDownOpen" Value="True"/>) to open the combobox. But when I tab again..the focus move to next item in the opened combobox….and it cycles over there. I am not able to tab out to next control.

What is wrong here?

Thanks

Answer 1

Try :

<Style TargetType="{x:Type ComboBoxItem}">
    <Setter Property="IsTabStop" Value="False"/>
</Style>

Or

Work with KeyboardNavigation :

WPF tab order with custom controls?

Not recommend, but works…

      <Grid>
            <ComboBox Grid.Row="1" Margin="0,0,0,0" Name="comboBox1" HorizontalAlignment="Left" Width="120" Height="20"  IsEditable="False" KeyDown="comboBox1_KeyDown"  GotKeyboardFocus="comboBox1_GotKeyboardFocus" >
                <ComboBox.Style>
                    <Style TargetType="{x:Type ComboBox}">
                    <Style.Triggers>
                        <Trigger Property="IsKeyboardFocusWithin" Value="True">
                            <Setter Property="IsDropDownOpen" Value="True" />
                        </Trigger>
                    </Style.Triggers>
                </Style>
                </ComboBox.Style>
                <ComboBoxItem>Male</ComboBoxItem>
                <ComboBoxItem>Female</ComboBoxItem>
                <ComboBoxItem>Unknown</ComboBoxItem>
            </ComboBox>

        </Grid>

    private void comboBox1_KeyDown(object sender, KeyEventArgs e)
    {
        ComboBox cb = sender as ComboBox;
        if (e.Key == Key.Tab && cb.IsDropDownOpen)
        {
            ComboBoxItem item = FocusManager.GetFocusedElement(Window.GetWindow(this)) as ComboBoxItem;
            cb.SelectedItem = item;
            cb.IsDropDownOpen = false;
            e.Handled = true;
        }
    }

   private void comboBox1_GotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
        {
            ComboBox cb = sender as ComboBox;
            cb.IsDropDownOpen = true;
        }