How to use WPF DataGridRow events with Interaction.Triggers / MVVM EventToCommand

Question

The MVVMLight EventToCommand can be used to fire an ICommand on your viewmodel quite easily.

<DataGrid>
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="SelectionChanged">
            <GalaSoft_MvvmLight_Command:EventToCommand
                Command="{Binding ProductSelectionChangedCommand, Mode=OneWay}    "
                CommandParameter="{Binding SelectedItems, ElementName=gridProducts}" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
</DataGrid>

In this instance the SelectionChanged event belongs to DataGrid, and the Interaction.Triggers xaml is nested directly inside DataGrid.

I cannot figure out how to do the same when the event is a DataGridRow (which has its own events for each row).

I managed to do this, but it involves a handler function which I'd like to avoid :

<DataGrid>
    <DataGrid.ItemContainerStyle>
        <Style TargetType="DataGridRow">
            <EventSetter Event="DataGridRow.MouseEnter" 
                         Handler="Row_MouseEnter"/>
        </Style>
    </DataGrid.ItemContainerStyle>
</DataGrid>

In the Row_MouseEnter event (on my .xaml.cs file) I just 'find the command' on the ViewModel and trigger it programatically.

I'd really like to know if there's a way of doing the same directly with Interaction.Triggers

(FYI: What I'm doing is I have a panel above the grid which displays details of the row that the mouse is over before clicking on it - which triggers a detail view).

Answer 1

Yeah you can directly bind to the command in your ViewModel by creating your own custom behaviour class and using it in xaml file. These links might get you started - Binding using interactivity and Binding through interaction in MVVM