combotree下拉框多选

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        var dataJson = "[";
        dataJson += "{\"id\":\"all\",\"text\":\"全部\",\"checked\":true" + ",\"children\":["
        dataJson += "{\"id\":\"PM25\",\"text\":\"PM2.5\"},"
        dataJson += "{\"id\":\"NO2\",\"text\":\"NOX\"},"
        dataJson += "{\"id\":\"TEMPERATURE\",\"text\":\"温度\"},"
        dataJson += "{\"id\":\"HUMIDITY\",\"text\":\"湿度\"}]"
        dataJson += "}]";
        var dateJson = $.parseJSON(dataJson);
        $("#MicroMultiselect").combotree({
            multiple: true,
            data: dateJson,
            valueField: 'id',
            textField: 'text',
            onSelect: function (item) {
            }
        });