ASP.NET中 Execl导出的六种方法实例

代码如下:
        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <param name="page"></param>
        /// <param name="dt"></param>
        //方法一：
        public void ImportExcel(Page page, DataTable dt)
        {
            try
            {

                string filename = Guid.NewGuid().ToString() + ".xls";
                string webFilePath = page.Server.MapPath("/" + filename);
                CreateExcelFile(webFilePath, dt);
                using (FileStream fs = new FileStream(webFilePath, FileMode.OpenOrCreate))
                {
                    //让用户输入下载的本地地址
                    page.Response.Clear();
                    page.Response.Buffer = true;
                    page.Response.Charset = "GB2312";

                    //page.Response.AppendHeader("Content-Disposition", "attachment;filename=MonitorResult.xls");
                    page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + filename);
                    page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
                    page.Response.ContentType = "application/ms-excel";

                    // 读取excel数据到内存
                    byte[] buffer = new byte[fs.Length - 1];