Firing a Command within EventTrigger of a style?

Question

As you know you can\'t bind an Event directly to a command without a behaviour:

Answer 1

Since you are retemplating the DataGridCell, you could add the triggers to the root element in the control template. Something like:

<ControlTemplate TargetType="{x:Type DataGridCell}">
    <Grid x:Name="root" Background="Transparent">
        <i:Interaction.Triggers>
            <i:EventTrigger EventName="PreviewMouseDoubleClick">
                <i:InvokeCommandAction Command="{Binding TradeEntryCommand}" />
            </i:EventTrigger>                            
        </i:Interaction.Triggers>
    </Grid>
</ControlTemplate>

Answer 2

Thats a version I am using for a Button-command in a similar situation (Button in DataGridRow, Command on DataGrid should be invoked by the Button and I need the DataContext of the row in my command). You would have to use the command of the InvokeCommandAction of the doubleClick-trigger instead, but then it should work as well, I suppose.

Good luck!

    <DataTemplate>
            <TextBlock>                             
           <Button x:Name="cmdButton"                            
                                    Command="{Binding Path=DataContext.CommandNameInViewModel, 
                                        RelativeSource={RelativeSource AncestorType={x:Type TypeOfAncestorWithTheViewModel}}}"
                                    CommandParameter="{Binding}" >      
                                    Do something
        </Button>

    </TextBlock>  
</DataTemplate>