实现文件下载而不是由ie打开的代码

<%
  Const ForReading=1
  Const TristateTrue=-1 ''Unicode
  Const FILE_TRANSFER_SIZE=16384 ''16k
  
  ''Use the following line for IIS4/PWS - this is the default for IIS5
  Response.Buffer = True
  
  Function TransferFile(path, mimeType, filename)
  Dim objFileSystem, objFile, objStream
  Dim char
  Dim sent
  send=0
  TransferFile = True
  
  Set objFileSystem = Server.CreateObject("Scripting.FileSystemObject")
  Set objFile = objFileSystem.GetFile(Path)
  Set objStream = objFile.OpenAsTextStream(ForReading, TristateTrue)
  
  Response.AddHeader "content-type", mimeType
  response.AddHeader "Content-Disposition","attachment;filename="&filename
  Response.AddHeader "content-length", objFile.Size
  
  Do While Not objStream.AtEndOfStream
   char = objStream.Read(1)
   Response.BinaryWrite(char)
   sent = sent + 1
   If (sent MOD FILE_TRANSFER_SIZE) = 0 Then
   Response.Flush
   If Not Response.IsClientConnected Then
   TransferFile = False
   Exit Do
   End If
   End If
  Loop
  
  Response.Flush
  If Not Response.IsClientConnected Then TransferFile = False
  
  objStream.Close
  Set objStream = Nothing
  Set objFileSystem = Nothing
  End Function
  
  Dim path, mimeType, sucess
  ''Server.MapPath(path)
  path = "C:\Inetpub\wwwroot\help.gif"
  mimeType = "application/x-msdownload"
  sucess = TransferFile(path, mimeType,"help.gif")
  Response.End
  %>

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