前端mgr.js   

 do_exportsv: function () {
        var win = this;
        var fd = new ActiveXObject("MSComDlg.CommonDialog");
        fd.Filter = "Excel文档|*.xlsx";
        fd.FilterIndex = 1;
        fd.MaxFileSize = 128;
        fd.ShowSave();//這個是儲存的對話框，如果是需要打開的話，就要用fd.ShowOpen()
        if (fd.filename == '') {
            return;
        }
        Ajax_request("Data.aspx?cmd=do_exportsv", { filename: fd.filename }, win.on_exportsv, win);//获取要保存文件的全路径
    },
    on_exportsv: function (sender, data) {
        //sender.store.reload();
        messagebox_show(data);
    },


 tbar: ['-', {
        text: "增加",
        iconCls: "icon-add",
        handler: function () { this.ownerCt.ownerCt.do_add() }
    }, '-', {
        text: "刷新",
        iconCls: "icon-refresh",
        handler: function () { this.ownerCt.ownerCt.do_refresh() }
    }, '-', {
        text: "导出",
        iconCls: "icon-exportsv",
        handler: function () { this.ownerCt.ownerCt.do_exportsv() }
    }, '-'],

后端Data.aspx.cs

 protected void do_exportsv()
        {
            string path_filename = Pub.read_param(Request, "filename");
            DBSQLite.DataConn conn = new DBSQLite.DataConn();
            string sql = "select *  from servicelist";
            DataTable dt = DBSQLite.DataConn.select(DBSQLite.DataConn.currdb, sql);
            dt.Columns.Add("filename", typeof(string));
            foreach (DataRow dr in dt.Rows)
            {
                dr["filename"] = get_asmx_filename(DBUtils.get_str(dr, "servicename") + ".asmx");
            }

            if (null == dt || dt.Rows.Count <= 0) return;

            string content = "服务名,服务地址,服务描述,节点注册地址,节点注册时间\n";
            // 保存数据
            for (int r = 0; r < dt.Rows.Count; r++)
            {
               
                content += dt.Rows[r]["servicename"].ToString() + ",";
                content +="http://localhost:80/ESB/service/"+ dt.Rows[r]["servicename"].ToString() + ".asmx,";
                content += dt.Rows[r]["servicedescription"].ToString() + ",";
                content += dt.Rows[r]["app_url"].ToString() + ",";
                content += dt.Rows[r]["app_url_reg_time"].ToString() + ",";
                
                content += "\n";
                //rowRead++;
                //percent = ((float)(100 * rowRead)) / totalCount; // 当前进度
            }
            System.IO.File.WriteAllText(path_filename.Replace(".xlsx",".csv"),content.Remove(content.LastIndexOf("\n")),Encoding.UTF8);
            string msg = "导出数据成功！";
            Response.Write(Pub.make_json(msg));

        }