记——文章分享execl导出功能和自己导出比对

//这个方法是nopi插件
protected void btn_Export_Click(object sender, EventArgs e)
    {
        string FileID = "";
        if (Request.QueryString["fujian"] != null && Request.QueryString["fujian"].ToString() != "")
        {
            FileID = Request.QueryString["fujian"].ToString();
        }
        string title = GetFileTile(FileID);//文件标题
        Workbook workbook = new Workbook(); //工作簿
        Worksheet sheet = workbook.Worksheets[0]; //工作表
        Cells cells = sheet.Cells; //单元格        
        //列宽
        cells.SetColumnWidth(0, 20.00);
        cells.SetColumnWidth(1, 30.00);
        cells.SetColumnWidth(2, 30.00);
        cells.Merge(0, 0, 1, 3);//合并单元格
 
        cells[0, 0].PutValue(title + "/文件已学人员名单");
        cells[0, 1].PutValue("");
        cells[0, 2].PutValue("");
        cells[1, 0].PutValue("序号");
        cells[1, 1].PutValue("姓名");
        cells[1, 2].PutValue("时间");
        string sql = "order by StudyTime";
        ds = PublishBLL.GetCommentCount(FileID, sql);
        if (ds.Tables[0].Rows.Count > 0)
        {
 
            for (int i = 1; i < ds.Tables[0].Rows.Count + 1; i++)
            {
                //Aspose.Cells.Style styleTitle = workbook.Styles[workbook.Styles.Add()];//新增样式
                //styleTitle.HorizontalAlignment = TextAlignmentType.Center;//文字居中
                //styleTitle.Font.Name = "宋体";//文字字体
                //styleTitle.Font.Size = 18;//文字大小
                //styleTitle.Font.IsBold = true;//粗体
                cells[i + 1, 0].PutValue("" + i.ToString().PadLeft(3, '0') + "");
                cells[i + 1, 1].PutValue("" + ds.Tables[0].Rows[i - 1]["StudyName"].ToString() + "");
                cells[i + 1, 2].PutValue("" + ds.Tables[0].Rows[i - 1]["StudyTime"].ToString() + "");
            }
        }
        string filename = "统计" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
        string path = ConfigurationManager.AppSettings["StudyFile"] + @"\" + filename + "";
        workbook.Save(path);//保存到硬盘
 
        #region 下载
        System.IO.MemoryStream ms1 = workbook.SaveToStream();//生成数据流
        byte[] bt1 = ms1.ToArray();
        string fileName = "统计" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";//客户端保存的文件名
        //以字符流的形式下载文件
        Response.ContentType = "application/vnd.ms-excel"; //通知浏览器下载文件而不是打开
 
        Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
        Response.BinaryWrite(bt1);
        Response.Flush();
        Response.End();
        #endregion
    }

　我写的：缺点（无法进行execl格式调整）

 public void exeport(string sql, string[] tableHeaders, string FieldList, string fileName)
        {
            DataTable dataTable = DbSession.Default.FromSql(sql).ToDataTable();
            if (dataTable != null && dataTable.Rows.Count > 0)
            {
                StringBuilder stringBuilder = new StringBuilder();
                for (int i = 0; i < tableHeaders.Length; i++)
                {
                    string arg = tableHeaders[i];
                    stringBuilder.AppendFormat("\"{0}\"", arg);
                    stringBuilder.Append("\t");
                }
                stringBuilder.Remove(stringBuilder.Length - 1, 1);
                stringBuilder.Append("\r\n");

                string[] array = FieldList.Trim().Split(new char[]
                {
                    ','
                });
                foreach (DataRow dataRow in dataTable.Rows)
                {
                    for (int j = 0; j < array.Length; j++)
                    {
                        stringBuilder.AppendFormat("\"{0}\"", dataRow[array[j]].ToString()); 
                        stringBuilder.Append("\t");//单元格分割
                    }
                    stringBuilder.Remove(stringBuilder.Length - 1, 1);
                    stringBuilder.Append("\r\n");//换行
                }
                if (stringBuilder.Length > 0)
                {
                    byte[] bytes = Encoding.Default.GetBytes(stringBuilder.ToString());
                    FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write);
                    fs.Write(bytes, 0, bytes.Length);
                    fs.Flush();
                    fs.Close();
                }
            }

        }