怎样在easyui中的datagrid的列中添加combobox并动态获取数据到combobox中?

<table id="data" class="easyui-datagrid" style="width:700px;height:250px"
        url="getAllServer.do" data-options="pageSize:5 ,pageList: [3,5,10]"
        toolbar="#toolbar" pagination="true"
        rownumbers="true" fitColumns="true" singleSelect="true">
        <thead>
            <tr>
                <th field="SERVICENO" width="20">编号</th>
                <th field="CLIENT" width="50">客户</th>
                <th field="OUTLINE" width="70">概要</th>
                <th field="SERVICETYPE" width="30">服务类型</th>
                <th field="CREATOR" width="30">创建人</th>
                <th field="CREATETIME" width="40">创建日期</th>
                <th field="set" width="80">分配给</th>
                <th field="operate" width="30">操作</th>
            </tr>
        </thead>
      </table>

是动态获取数据的,怎样给倒数第二列添加下拉框

$('#data').datagrid({

//url: 'memberInfo.ashx',
columns: [[

            { field: 'cbo_memberInfo', checkbox: true },
            { field: 'ID', title: 'ID', width: 100, hidden: true },
            { field: 'Suoshu', width: 100,
                editor: {
                        type: 'combobox',
                        options: {
                            required: true,
                            editable:false,
                            missingMessage: '请选择',
                            url: 'combobox的数据',                       
                            valueField: 'name',
                            textField: 'value1',
                            panelHeight: 100
                        }
                    }
            }

        ]]

})