Easyui-datagrid groupview分组后勾选问题

上面datagrid对应的代码如下：

 $('#tbCheckOut').datagrid({
             title: '待分配库位',
             iconCls: 'icon-search',
             width: 1112,
             height: 500,
             rownumbers: true,
             idField: 'ID',
             sortOrder: 'desc',
             sortName: 'ID',
             remoteSort: false,
             nowrap: false,
             collapsible: true,
             striped: true,
             fitColumns: false,
             pagesize: 10,
             pagination: true,
             url: '/StockOut/WebAjax/ProcCheckOutList.ashx',
             queryParams: convertArray($('#fmSearch').serializeArray()),
             onLoadSuccess: function (data) {
                 $('#tbCheckOut').datagrid('collapseGroup'); //设置折叠
             },
             onDblClickCell: function (index, field, value) {
             },
             columns: [[
             { field: 'singlechk', width: 50, checkbox: true},
             { field: 'CheckOutType', title: '单据类型', width: 80, align: 'center', sortable: true, formatter: function (value, row) {
                 return FGetCheckOutTypeInfo(value);
             }
             },
             { field: 'PostTime', title: '下单日期', width: 70, align: 'center', sortable: true, formatter: function (value, row) {
                 return ChangeShortDateFormat(value);
             }
             },
             { field: 'K3OrderCode', title: '编号', width: 120, align: 'center', sortable: true },
             { field: 'SerialNo', title: '流水号', width: 120, align: 'center', sortable: true },
             { field: 'CustomName', title: '客户', width: 200, align: 'center', sortable: true, formatter: function (value, row) {
                 var rtnStr = value; //todo 截取
                 return rtnStr;
             }
             },
             { field: 'ItemSNCode', title: '物料编码', width: 120, align: 'center', sortable: true },
             { field: 'SKUCode', title: 'SKU', width: 50, align: 'center', sortable: true },
             { field: 'ItemSNName', title: '物料名称', width: 250, align: 'center', sortable: true },
             { field: 'AssignNum', title: '计划', width: 50, align: 'center', sortable: true },
             { field: 'ActualNum', title: '实际', width: 50, align: 'center', sortable: true },
             { field: 'HasAllotedNum', title: '已分配', width: 50, align: 'center', sortable: true },
             { field: 'UnitName', title: '单位', width: 50, align: 'center', sortable: true },
             { field: 'SpecificationsName', title: '规格型号', width: 60, align: 'center', sortable: true },
             { field: 'WarehouseName', title: '发货仓库', width: 100, align: 'center', sortable: true },
             { field: 'ChannelName', title: '渠道', width: 30, align: 'center', sortable: true },
             { field: 'ID', title: '操作', width: 120, align: 'center', formatter: function (value, row) {
                 var rtnStr = "";
                 if (row.Status == 0) {
                     rtnStr = '<a href="javascript:void()" class="gridAColor" onclick="FProcTask(1,' + value + ')">自动出库</a> <a href="javascript:void()" onclick="FProcTask(0,' + value + ')" class="gridAColor" >手动出库</a>';
                 }
                 return rtnStr;
             }
             }
         ]],
             groupField: 'K3OrderCode',
             view: groupview,

             groupFormatter: function (value, rows) {
                 var rtnStr = "";
                 rtnStr += '<input type="checkbox" onclick="FGPCkbClick(this)" helpGPVal="' + value + '" name="gpChk" />';
                 rtnStr += value + ' 单据数量=' + rows.length + '条';
                 var sumAssignNum = 0;
                 var sumActualNum = 0;
                 for (var i = 0; i < rows.length; i++) {
                     sumAssignNum += rows[i].AssignNum;
                     sumActualNum += rows[i].ActualNum;
                 }
                 rtnStr += " 计划量=" + sumAssignNum;
                 rtnStr += " 实际量=" + sumActualNum;
                 return rtnStr;
             }
         });

下面是实现该功能的几个js函数

  //分组ckb事件
     function FGPCkbClick(obj) {
         var gpVal = $(obj).attr("helpGPVal");
         var isChecked = $(obj).attr('checked') == 'checked' ? true : false;
         selectByGroup(isChecked, gpVal, '#tbCheckOut');
     }
     //分组选中
     function selectByGroup(checked, value, tableIdSelector) {
         var groups = $(tableIdSelector).datagrid("options").view.groups;
         var rows;
         for (var i = 0; i < groups.length; i++) {
             if (groups[i].value == value) {
                 rows = groups[i].rows;
                 break;
             }
         }
         if (checked) {
             for (var i = 0; i < rows.length; i++) {
                 $(tableIdSelector).datagrid("selectRow", $(tableIdSelector).datagrid("getRowIndex", rows[i]));
             }
         }
         else {
             for (var i = 0; i < rows.length; i++) {
                 $(tableIdSelector).datagrid("unselectRow", $(tableIdSelector).datagrid("getRowIndex", rows[i]));
             }
         }
     }
     //datagrid顶部ckb事件
     function BoundCkbAllClick() {
         $('.datagrid-header-check input').click(function () {
             var isChecked = $(this).attr('checked');
             $('input[name="gpChk"]').each(function (index, elemetn) {
                 //alert('90:' + $(this).attr('helpgpval'));
                 if (isChecked == 'checked') {
                     $(this).attr('checked', isChecked);
                 } else {
                     $(this).removeAttr('checked');
                 }

             });
         });
     }

感谢园友white knight提供的一个方法，完美解决