EXT中导出表格中的数据到Excel

{                            itemId: 'excel',                            text: '导出',                            iconCls: 'btnExportExcel',                            disabled: false,                            handler: function () {                                //判断数据状态                                if (tempDate.length == 0) {                                    var alertbox = Ext.widget('messagebox', { shadow: false });                                    alertbox.show({                                        title: '提示',                                        msg: '结果数据为空！请先进行数据统计分析操作！',                                        buttons: Ext.Msg.OK,                                        buttonAlign: 'center',                                        icon: Ext.Msg.WARNING                                    });                                    return;                                }                                //预处理tempDate                                var tempD = [];                                var buildArr = function (guidspacequery, objtype, layername, pointAlt, wEll) {                                    this.标识 = guidspacequery;                                    this.类型 = objtype;                                    this.所属管类 = layername;                                    this.点高程 = pointAlt;                                    this.点类型 = wEll;                                }                                for (var i = 0; i < tempDate.length; i++) {                                    var temp = new buildArr(tempDate[i].guidspacequery, tempDate[i].objtype, tempDate[i].layername, tempDate[i].pointAlt, tempDate[i].wEll);                                    tempD.push(temp);                                }                                //获取gridpanel数据，json为字符串                                var jsonData = Ext.encode(tempD);                                var titleData = me.title;                                //判断浏览器类型是否为IE                                if (Ext.isIE) {                                                                        //创建‘frmDummy’                                    if (!Ext.fly('frmDummy')) {                                        var frm = document.createElement('form');                                        frm.id = 'frmDummy';                                        frm.name = "excelid";                                        frm.className = 'x-hidden';                                        document.body.appendChild(frm);                                    }                                    //传送数据到后台处理成excel                                    Ext.Ajax.request({                                        url: 'NetCode/GridToExcel.ashx',                                        method: 'POST',                                        form: Ext.fly('frmDummy'),                                        callback: function (o, s, r) {                                        },                                        isUpload: true,                                        params: { excelContent: jsonData, excelTitle: titleData }                                    });                                } else {                                    var alertbox = Ext.widget('messagebox', { shadow: false });                                    alertbox.show({                                        title: '提示',                                        msg: '请使用IE浏览器！',                                        buttons: Ext.Msg.OK,                                        buttonAlign: 'center',                                        icon: Ext.Msg.WARNING                                    });                                    return;                                }                            }                        }