Hello Hristo,
Thank you a lot. I solved my issue. I have 2 grids with 2 types of selectionmode. In case of each one, I implement the following:
– Grid A (selectionmode = singleselect):
ready: function () {
$(“#jqxgridA”).jqxGrid(‘ensurerowvisible’, sessionRowIndex);
},
With sessionRowIndex stores selection row index into session and send to client side after postback.
– Grid B (selectionmode = checkbox):
ready: function () {
if (sessionRowsIndexOnGridB.length > 0) {
var rowboundindex = $(‘#jqxgridB’).jqxGrid(‘getrowboundindex’, parseInt(sessionRowsIndexOnGridB[0], 10));
$(“#jqxgridB”).jqxGrid(‘ensurerowvisible’, rowboundindex);
}
},
With sessionRowsIndexOnGridB stores the list of selection row indexes into session and send to client side after postback.
Thank you again. 
Best regards,
Hong Phuc