How to bind in WPF - 2 combo boxes

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I have 2 combo boxes addCC_cmbCollected & addCC_cmbQuality. Depending on the item selected in addCC_cmbCollected which is either Yes or No I want to disable the other combo box (addCC_cmbQuality) and select a particular item from this combo box, as I am storing the values to an XML and I want that if this is disabled the default value would be "NA" instead of showing the latest value when this was enabled.

XML

<ComboBox x:Name="addCC_cmbQuality" Grid.Column="7" HorizontalAlignment="Left" Margin="214,260,0,0" VerticalAlignment="Top" Width="111" RenderTransformOrigin="0.423,0.409" Height="23" Loaded="cmbQuality_Loaded">
    <ComboBox.Style>
        <Style TargetType="{x:Type ComboBox}">
            <Setter Property="IsEnabled" Value="True" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding Path=SelectedValue, ElementName=addCC_cmbCollected}" Value="No">
                    <Setter Property="IsEnabled" Value="False" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </ComboBox.Style>
</ComboBox>

What I have tried:

I have managed to disable the addCC_cmbQuality combobox but cannot find a way to show a particular value/item.

Posted 26-Mar-16 0:37am

datt265

Updated 26-Mar-16 12:38pm

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CHill60 · Answer 1 · 2016-03-26T12:38:00

Try something like this (I used a couple of buttons to toggle between enabled/disabled - you will probably want this in the OnSelectionChanged event)

C#

private void Disable_Click(object sender, RoutedEventArgs e)
{
    Job.Items.Add("NA");
    Job.SelectedValue = "NA";
    Job.IsEnabled = false;
}
private void Enable_Click(object sender, RoutedEventArgs e)
{
    Job.Items.Remove("NA");
    Job.IsEnabled = true;
}