JQGRID - maintain check box selection - page refresh / redirect

How to maintain the checkbox selection after the page refresh / reload / redirected from some other page in JQGRID.

I am working in aspx pages.

I am able to maintain checkbox selection in paging using following code:

    gridComplete: function () {
     var currentPage = $(this).getGridParam('page').toString(); //retrieve any previously stored rows for this page and re-select them
     var retrieveSelectedRows = $(this).data(currentPage);
     if (retrieveSelectedRows) {
        $.each(retrieveSelectedRows, function (index, value) {
        $('#list').setSelection(value, false);
     });
    }
   },
   onPaging: function (a) {
     var pagerId = this.p.pager.substr(1); // ger paper id like "pager" 
     var pageValue = $('input.ui-pg-input', "#pg_" +           $.jgrid.jqID(pagerId)).val();
     var saveSelectedRows = $(this).getGridParam('selarrrow'); //Store any selected rows 
     $(this).data(pageValue.toString(), saveSelectedRows);
  }

How to maintain the checkbox selection state in page refresh / redirect / reload in JQGrid ?

Also, I tried the following code on Window.OnLoad, but it is not working

$("#list").trigger("reloadGrid", [{page: 1, current: true}]);