how to get index of first row in grid

hi,



I have used numbers 0,1,2,… to set the values of row id in a grid

mygrid.setRowId(ind, row_id);



now I am calling some custom row manipulation functions on grid,

where I am not able to get a row index for zero th row ie. first row of grid…

I am using

mygrid.getRowIndex(mygrid.getSelectedId()); api…

This happens for zeroth row only otherwise for all other rows , I am getting row index…

The ID == 0 is reserved for virtual root item, it can’t be used as row ID ( same as null, false, undefined values )