Binding a WPF Button CommandParameter to the Button itself in DataTemplate

Question

I have a DataTemplate that represents AppBar buttons that I declare through a collection of custom AppBarCommand objects.

 public AppBarCommand(RelayCommand command, string buttonstyle) { Command = command; ButtonStyle = buttonstyle; } <DataTemplate> <Button Command="{Binding Command}" Style="{Binding ButtonStyle, Converter={StaticResource StringNameToStyleConverter}}"/> </DataTemplate>

I would like to add a CommandParameter binding, but the parameter has to be the Button itself. This is so I can set the PlacementTarget of a Callisto flyout. Is this possible?

Probably easier to handle the Button's Click event. The first argument you receive in your handler will be the Button. — Jay
– Jay, Commented Sep 13, 2012 at 20:09

Ryan_S · Accepted Answer · 2016-01-11 17:54:10Z

<Button Command="{Binding Command}" CommandParameter="{Binding RelativeSource={RelativeSource Self}}" />

Your Command property should be the generic version of the RelayCommand: RelayCommand<object> for instance.

King Chan · Accepted Answer · 2012-09-13 20:14:34Z

Answer like Miklós Balogh said, or you can:

<Button x:Name="MyButton" Command="{Binding Command}" CommandParameter={Binding ElementName=MyButton ... />

Emir · Accepted Answer · 2021-01-11 14:51:59Z

I had the same problem but I used it in a bit different context:

<MenuItem ItemsSource="{Binding MyList}"> <MenuItem.ItemContainerStyle> <Style TargetType="{x:Type MenuItem}"> <Setter Property="Command" Value="{Binding RelativeSource={ RelativeSource FindAncestor, AncestorType={ x:Type Window}}, Path= DataContext.MyListItemCommand}"/> <Setter Property="CommandParameter" Value="{Binding}" /> </Style> </MenuItem.ItemContainerStyle> </MenuItem>

so I assume that even if you write it like this

<Button Command="{Binding Command}" CommandParameter="{Binding}" />

it should work.

I also recommend reading this post to understand it better.

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Binding a WPF Button CommandParameter to the Button itself in DataTemplate

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