WPF Datagrid ContextMenu SelectedItem

Question

I have the following problem. I have a DataGrid with a ContextMenu. But when the Command is triggered the SelectedItem is always null.
Any recommendations?

Thats my ContextMenu:

<DataGrid.ContextMenu>
  <ContextMenu>
  <MenuItem Command="{Binding OpenFileCommand}"
           CommandParameter="{Binding Path=SelectedItem,
           RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
           Header="open file" />

i also tried: CommandParameter="{Binding ElementName=nameOfGrid, Path=SelectedItem}"

Answer 1

I think your answer is here: CommandParameters in ContextMenu in WPF

Another better option imho is to keep "SelectedItem" binded in your ViewModel.

Then you don't need a command parameter anymore, and you can juste use the SelectedItem binded from your ViewModel.

Answer 2

Thanks for your help. I fixed it this way:
CommandParameter="{Binding PlacementTarget.SelectedItem, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContextMenu}}}"

Answer 3

The problem is that the ContextMenu is in a different VisualTree .

You could use the Tag for binding the Command . See the following link