How to get Flyout's owner Control?

[nasterhe]

I have many SplitButtons on my interface, and the Flyout menu of each SplitButton is the same, but it does a different action after clicking, so my code is as follows:

   <Style Selector="SplitButton">
     <Setter Property="Command" Value="{Binding ImageSignButtonClick}"/>
     <Setter Property="CommandParameter" Value="{Binding $self,RelativeSource={RelativeSource Mode=Self}}"/>
     <Setter Property="Flyout">
       <Setter.Value>
         <MenuFlyout Placement="Bottom" >
           <MenuItem Command="{Binding OpenCommand}" CommandParameter="{Binding ...}">
             <MenuItem.Header>
               <StackPanel Orientation="Horizontal">
                 <Image Width="16" Height="16" Source="/Assets/Open.png"/>
                 <TextBlock Text="OpenIt" Margin="5,0,0,0" />
               </StackPanel>
             </MenuItem.Header>
           </MenuItem>
         </MenuFlyout>
       </Setter.Value>
     </Setter>
   </Style>

MenuItem Command="{Binding OpenCommand}" CommandParameter="{Binding ...}"
I would like to know how the CommandParameter of the MenuItem binds to get that SplitButton.

[msneijders]

This should work:

...
<MenuItem Command="{Binding OpenCommand}" CommandParameter="{Binding $parent[SplitButton]}">
...

See docs: Binding to an ancestor.