Q:

Automatically add an Order column into tablix in Local Report?

I can populate my own Order column in the DataSource and pass this DataSource to Tablix. But if there is a way to automatically an Order column right in Tablix at design time (such as using some variable or expression), it would be better. Here is what I want:
Order      |      Column 1    |    Column 2  
  1
  2
  3
 ...

The Order column can be added at design time easily, but how to populate it with ordinal numbers when refreshing report (of course, I don't want to populate it from data source). I want some way to populate it via expression or something like that right in Local Report designer.
Your help would be highly appreciated!
Thank you very much in advance!

A:

Yes, 
Put expression =RowNumber(nothing) in Order column.
and if you want to show row number differently for group try =RowNumber("GroupName1")

