Hi Kunal,

I hope the information in my response was helpful.  Please let me know if you had further questions

Hi Kunal,

The preview events fire before the new cell or record is activated.  Hence the ActiveRecord holds the last active record which initially would be null.  In any case it wouldn't necessarily be the record associated with the current preview cell. 

It looks like in your sample you are using the default cellClickAction, so you might want to use the CellActivated event where you can access the e.Cell.Record.  At that point the ActiveRecord would be the active cell's record.  (There is a comparable event, RowActivated where you can access the e.Record.) 

The only issue would be that if you click on the same cell twice, the event wouldn't fire a second time.  Of course the ActiveRecord would not have changed either.  I'm not sure I understand the implications of multiple clicks on the same cell in your processing.  Perhaps it would be helpful for the CellValuePresenter's MouseLeftButtonDown to fire although it also would fire before the CellActivated event. 

Please let me know if this information is helpful. 

Thanks for your reply,

We are using MVVM. In XamDataGrid we have  ActiveRecord="{Binding Path=ActiveRecord, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

when we added 

<i:Interaction.Triggers>
<i:EventTrigger EventName="CellActivated">
<i:InvokeCommandAction Command="{Binding GridCommand}" />
</i:EventTrigger>

we are able to get ActiveRecord.But this property fires only if cell is not activated But while using PreviewMouseLeftButtonDown event is not firing.

If I raise PreviewMouseLeftButtonDown event through code behind, yes its working fine. But ActiveRecord property is null.

So we need cell click as every time click on same cell need to get ActiveRecord property as well.