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      VB.net 2010 視頻教程 VB.net 2010 視頻教程 VB.net 2010 視頻教程
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      首頁 > 網站開發 > ASPnet >
      • asp.net教程之ASP實現文件直接下載

      • 2017-06-11 20:12 來源:未知
      在IE進行文檔鏈接時,如果遇到OLE支持的文檔,IE會自動調用相應程序打開它,有時候這種功能并不是我們所需的,雖然我們可以提醒用戶用鼠標右鍵-->"目標另存為...."命令來下載文檔,但這樣畢竟不太友好,本文描述了利用FSO及Stream方法實現IE直接下載文檔.

      <%@ language=vbscript codepage=65001%>

      <% 
      ''Filename must be input
      if Request("Filename")="" then
      response.write "<h1>Error:</h1>Filename is empty!<p>"
      else
      call  downloadFile(replace(replace(Request("Filename"),"\",""),"/",""))    

      Function  downloadFile(strFile)    
      ''  make  sure  you  are  on  the  latest  MDAC  version  for  this  to  work    
      ''  get  full  path  of  specified  file    
      strFilename  =  server.MapPath(strFile)    

      ''  clear  the  buffer    
      Response.Buffer  =  True    
      Response.Clear    

      ''  create  stream    
      Set  s  =  Server.CreateObject("ADODB.Stream")    
      s.Open    

      ''  Set  as  binary    
      s.Type  =  1    

      ''  load  in  the  file    
      on  error  resume  next    

      ''  check  the  file  exists
      Set  fso  =  Server.CreateObject("Scripting.FileSystemObject")    
      if  not  fso.FileExists(strFilename)  then    
      Response.Write("<h1>Error:</h1>"&strFilename&" does not exists!<p>")    
      Response.End    
      end  if

      ''  get  length  of  file    
      Set  f  =  fso.GetFile(strFilename)    
      intFilelength  =  f.size    

      s.LoadFromFile(strFilename)    
      if  err  then    
      Response.Write("<h1>Error: </h1>Unknown Error!<p>")    
      Response.End 
      end  if  

      ''  send  the  headers  to  the  users  Browse
      Response.AddHeader  "Content-Disposition","attachment;  filename="&f.name    
      Response.AddHeader  "Content-Length",intFilelength    
      Response.CharSet  =  "UTF-8"    
      Response.ContentType  =  "application/octet-stream"    

      ''  output  the  file  to  the  browser    
      Response.BinaryWrite  s.Read    
      Response.Flush    

      ''  tidy  up    
      s.Close    
      Set  s  =  Nothing    

      End  Function    
      end if
      %>      
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