文件的byte[]和名稱（含格式）存在數(shù)據(jù)庫，輸出到瀏覽器的時候內(nèi)容是空的。文件的格式不確定，這個時候contenttype應(yīng)該指定成什么，我現(xiàn)在是application/octet-stream，但是測試了下doc、txt、jpg輸出都是空的。代碼：   Response.Clear();    Response.ContentType = "application/octet-stream";    Response.AddHeader("Content-Length", bin.Length.ToString());    Response.AddHeader("Content-Disposition", "attachment;  filename=" Server.UrlEncode(query.Filename));    Response.OutputStream.Write(bin,0,bin.Length);   //Response.BinaryWrite()也不行 Response.Flush();   // Response.End();