How to check if multiple rows have been selected in a grid

查看当前Form选中了几行记录

FormDataSource  fds = salesTable.dataSource();//salesTable改为目标表，其他不变

if (fds.recordsMarked().lastIndex() > 1)
    info("Multiple records selected");
else
    info("1 or 0 records selected");

注：不能在super()后