Jqgrid排序和“没有记录消息”不起作用

Question

我需要实现两个功能：1）在没有数据到来时显示某种消息，2）能够对DataPoints列进行排序。应该相当直接，但功能不起作用。这是我的网格定义：

 $('#myGrid').jqGrid({
            datatype: 'local',
            jsonReader: als.common.jqgrid.jsonReader('Standard'),
            url: als.common.getServerPath() + 'ZscoreAjax/getData',
            mtype: 'POST',
            colNames: ['MethodCode','Lab', 'Standard', 'Nom. Val.', 'Mean', '%RSD', 'Data points', 'Z-score', 'Sorter', 'LDL', 'UDL'],
            colModel: [
                { name: 'MethodCode', index: 'MethodCode', width: 37, search: false, title: false, align: 'center', hidden:true},
                { name: 'LabCode', index: 'LabCode', width: 30, search: false, title: false, hidden:true },
                { name: 'Standard', index: 'Standard', width: 80, search: false, title: false },
                { name: 'NomVal', index: 'NomVal', width: 100, search: false, title: false, align: 'center' },

                {
                    name: 'Mean', index: 'Mean', width: 50, search: false, title: false, align: 'center'


                },
                { name: 'RSD', index: 'RSD', width: 50, search: false, title: false },
                { name: 'DataPoints', index: 'DataPoints', width: 50, search: false, title: false, align: 'center', sorttype: 'int'},
                { name: 'Zscore', index: 'Zscore', width: 50, search: false, title: false, align: 'right' },
                { name: 'Sorter', index: 'Sorter', width: 50, search: false, title: false, align: 'right' },
                { name: 'LDL', index: 'LDL', width: 50, search: false, title: false, align: 'right', hidden: true },
                { name: 'UDL', index: 'UDL', width: 50, search: false, title: false, align: 'right', hidden: true }
            ],
            autowidth: true,
            sortable: true,
            sortname: 'DataPoints',
            scroll: false,
            hidegrid: false,
            height: 200,
            width: 500,
            rowNum: 50,
            ignoreCase: true,
            altRows: true,
            emptyrecords: "No records to display",
            altclass: 'gridAltRowClass',
            loadComplete: function (data) {


            }
        });