Hi Manolo,
Thanks for using Syncfusion products.
We have analyzed your requirement and could you please confirm us whether you are expecting as follows.
1. A add row will be displayed all time at the content of the grid during initial rendering itself.
2. And after saving the new records, a new add row will be added that enable us to build a list of add rows.
3. The add row will be present at the grid even though grid contains empty datasource.
4. The snap of the grid will look like belowwith the add new row.
In the above snapshot, the highlighted section of the grid will be added at all time and also please refer our online references for more information on editing operation in grid.
Demo: http://asp.syncfusion.com/demos/web/grid/inlineonlocaldata.aspx
UG: http://help.syncfusion.com/ug/js/default.htm#!documents/editing2.htm
Please let us know if we misunderstood your requirement and provide us more information regarding the issue. The information provided would be more helpful for us to analyze the issue and provide you the response as early as possible.
Regards,
Madhu Sudhanan. P