Hello, 

I am using bar series. I want to show  label on NAxisCursorLine like attached image.

Hi Sweta,
Currently, its not possible to show a label at the intersection of the cursors - you can check out the following example"
All examples \ Axes \ Attributes \ Const Line Labels 
which shows how to display labels on consts lines and cursors.

Best Regards,
Nevron Support Team