aspx导出数据方法

1、导出txt

private static void Export(DataTable tb, string fileName)
    {
        HttpContext.Current.Response.Clear();
        string FileName = fileName + ".txt";
        HttpContext.Current.Response.Buffer = true;
        HttpContext.Current.Response.Charset = "GB2312";
        HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF7;
        HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
        HttpContext.Current.Response.ContentType = "application/ms-text";
        System.IO.StringWriter sw = new System.IO.StringWriter();
        for (int i = 0; i < tb.Rows.Count; i++)
        {
            for (int j = 0; j < tb.Columns.Count; j++)
            {
                sw.WriteLine(tb.Rows[i][j].ToString().Trim() +"\t");
            }
            sw.WriteLine("\r\n");
        }
        HttpContext.Current.Response.Write(sw.ToString());
        sw.Close();
        HttpContext.Current.Response.End();
    }

2、导出excel

private void PutExcel2Client()
        {
            string exportFile = _exportReportFileName;

            System.IO.FileInfo file = new System.IO.FileInfo(exportFile);
            HttpResponse contextResponse = HttpContext.Current.Response;
            contextResponse.Redirect(string.Format("~/UploadFile/ExportExcelFile/{0}", Path.GetFileNameWithoutExtension(TemplateName)
                                          + "_" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".xls"), false);
            HttpContext.Current.Response.Clear();
            // HttpContext.Current.Response.Charset = "GB2312";
            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
            // 添加头信息，为"文件下载/另存为"对话框指定默认文件名 
            HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpContext.Current.Server.UrlEncode(file.Name));
            // 添加头信息，指定文件大小，让浏览器能够显示下载进度 
            HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());

            // 指定返回的是一个不能被客户端读取的流，必须被下载 
            HttpContext.Current.Response.ContentType = "application/ms-excel";

            // 把文件流发送到客户端 
            HttpContext.Current.Response.WriteFile(file.FullName);
            // 停止页面的执行 

            HttpContext.Current.Response.End();
        }