respons——檔案下載

轉自：http://www.cnblogs.com/PingFang/archive/2007/08/15/857009.html
UpdateName = Server.MapPath("OnLoadDate\\" + UpdateName);//下載檔案路徑
               FileInfo file = new System.IO.FileInfo(UpdateName);
               Response.Clear();

               Response.Charset = "GB2312";

               Response.ContentEncoding = System.Text.Encoding.UTF8;

               // 添加頭資訊，為"檔案下載/另存新檔"對話方塊指定預設檔案名稱

               Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));

               // 添加頭資訊，指定檔案大小，讓瀏覽器能夠顯示下載進度

               Response.AddHeader("Content-Length", file.Length.ToString());

               // 指定返回的是一個不能被用戶端讀取的流，必須被下載

               Response.ContentType = "application/zip";

               // 把檔案流發送到用戶端

               Response.WriteFile(file.FullName);
           
               // 停止頁面的執行
               Response.End();