respons——文件下载

转自：http://www.cnblogs.com/PingFang/archive/2007/08/15/857009.html
UpdateName = Server.MapPath("OnLoadDate\\" + UpdateName);//下载文件路径
               FileInfo file = new System.IO.FileInfo(UpdateName);
               Response.Clear();

               Response.Charset = "GB2312";

               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

               Response.AddHeader("Content-Disposition", "attachment; filename=" + 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

               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

               Response.ContentType = "application/zip";

               // 把文件流发送到客户端

               Response.WriteFile(file.FullName);
           
               // 停止页面的执行
               Response.End();