Pass command parameter from the xaml

Question

I try to do something like this:

<DataGrid Name="myGrid" ItemSource="{Binding Path=MyCollection}">
   <DataGrid.ContextMenu>
       <ContextMenu>
          <MenuItem 
              Command="{Binding RemoveRow}" 
              CommandParameter="{Binding ElementName=myGrid, Path=SelectedItem}">
       </ContextMenu>
   </DataGridContextMenu>
</DataGrid>

but I got null always (I tried also SelectedIndex and SelectedValue)

if I pass the following parameter to the execution code, it works:

<MenuItem Command="{Binding RemoveRow}" CommandParameter="1">

Answer 1

Try something like this in your CommandParameter,

<DataGrid.ContextMenu>
     <ContextMenu>
           <MenuItem Header="MyHeader" 
                     Command="{Binding MyCommand}"
                     CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContextMenu}}, Path=PlacementTarget.SelectedItem}" />
</DataGrid.ContextMenu>

I already tested it and it should work.