1.  Is it possible, on loading data, to check some row of the “check” column

-> Use grid.selectedKeys.add(key). Once you do this, please ensure to reset the data provider, as shown in the attached example.

2.       Is it possible, on loading data, set row background color, not alternating, but based on change of code
-> Use the styleFunction (see example 2). Please note, this is only supported for the Advanced DataGrid.

FlexiciousFooterTest.mxml (1.46 kb)