WPF Binding in a Style Help?

I have a style to a custom control that inherits from combobox that I can't modify. Inside this style, there's a DataGrid control that takes in a ItemsSource, the DataGrid also has an x:Name that needs to get referenced in code somewhere, probably due to the event.

So basically

    <Style x:Key="ComboBoxStyle" TargetType="ComboBox">
        <Setter Property="Template">
            <Setter.Value>

               ... A whole bunch of other stuff.

               <xcdg:DataGridControl 
                 x:Name="CustomItemOneGrid"
                 ItemsSource="{Binding Source={StaticResource CustomItemOne_DataSource}}"
                 SelectionChanged="CustomItemOneGrid_SelectionChanged">

My problem here is that CustomItemOne_DataSource, well there's 3 times I'll use this control and well 3 datasources. Also, the selection changed event I need to subscribe to also. Is there a way to keep this in a style I can use开发者_Python百科 across all three controls, but still have different Event and ItemsSource?

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Define attached properties for the items that can change that are not defined by the ComboBox class (eg. GridItemsSource). Then bind to those attached properties in your template. Much like I discuss here.

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Normally I let me DataContext flow down from the Control that is implementing the style / data template and then bind to a property on that control. I wouldn't use StatisResources for your bindings.