Thank u also

<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
<script type="text/javascript" src="../../jquery.easyui.patch.js"></script>

var gview = $.extend({}, groupview, {
   onBeforeRender: function(target, rows){
      groupview.onBeforeRender.call(this, target, rows);

      var state = $.data(target, 'datagrid');
      var opts = state.options;
      if (opts.sortName != opts.groupField){
         return;
      }
      var groups = this.groups;
      groups.sort(function(a,b){
         var v1 = sumValue(a.rows, 'listprice');
         var v2 = sumValue(b.rows, 'listprice');
         return (opts.sortOrder=='asc'?1:-1)*(v1>v2?1:-1);
      });
      var index = 0;
      var newRows = [];
      for(var i=0; i<groups.length; i++){
         var group = groups;
         group.startIndex = index;
         index += group.rows.length;
         newRows = newRows.concat(group.rows);
      }
      state.data.rows = newRows;
      
      function sumValue(rows,field){
         var v = 0;
         $.map(rows, function(row){
            v += row[field];
         });
         return v;
      }
   }
})

$(function(){
   $('#dg').datagrid({
      view: gview,
      //...
   })   
})

i also encountered such problem .

hoping there's someone who can really help with this problem

Is this real ?

thanks for a great news..now a new and better works can be accomplish right away

yes it do works..
thanks for sharing such good source of codes for us..