function SelectRows(){ var masterTable = $find("<%= CandidatesGrid.ClientID %>").get_masterTableView(); var row = masterTable.get_dataItems(); for(i =0;i<row.length;i++) { var check=masterTable.get_dataItems()[i].getDataKeyValue("Check"); if(check !=0) { masterTable.get_dataItems()[i].set_selected(true); } else { masterTable.get_dataItems()[i].set_selected(false); // How to disable the row here? } } }