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}"

The problem is that the `ContextMenu` is in a different `VisualTree`. — wake-0, Jun 06 '16 at 09:14
You need to post more code than this if you want a meaningful response. — Lee, Jun 06 '16 at 09:14

F.Wen · Answer 1 · 2016-06-06T11:19:33.727

3

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

edited Jun 06 '16 at 11:19

answered Jun 06 '16 at 10:08

F.Wen

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score 2 · Answer 2 · edited May 23 '17 at 11:58

2

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.

edited May 23 '17 at 11:58

Community

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answered Jun 06 '16 at 09:13

Ouarzy

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score 0 · Answer 3 · answered Jun 06 '16 at 09:15

0

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

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

answered Jun 06 '16 at 09:15

wake-0

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WPF Datagrid ContextMenu SelectedItem

3 Answers3