asp.net excel导出功能

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
}