EXTJS从选择记录中获取值

        var gridPanel = this;        var selRs = this.getSelectionModel().getSelections();        if (selRs.length != 1) {            Ext.ux.Toast.msg('操作信息', '请选择一条记录！');            return ;        }        var _ids = Array();        for (var i = 0; i < selRs.length; i++) {            var overdueProjectId = selRs[i].id;            _ids.push(overdueProjectId);        }        var entrustor = selRs[0].json.entrustor;