asp二进制输出图片的源代码

' 8*******************************************8
'  需要在你的服务器上安装 MDAC 2.6 或MDAC2.7
' 8*******************************************8
< %
Dim  strFilePath, strFileSize, strFileName
Const  adTypeBinary  =   1
Response.Buffer  =   True
strFileName = " logo.gif "
FilePath = Server.MapPath( " manage/images/ " & strFileName)    
Response.Clear

Set  objStream  =  Server.CreateObject( " ADODB.Stream " )
objStream.Open
objStream.Type  =  adTypeBinary
objStream.LoadFromFile FilePath

strFileSize  = objStream.size
strFileType  =   lcase ( Right (strFileName,  4 ))  ' 文件扩展名

'  通过文件扩展名判断 Content-Types
Select   Case  strFileType
     Case   " .asf "
    ContentType  =   " video/x-ms-asf "
     Case   " .avi "
    ContentType  =   " video/avi "
     Case   " .doc "
    ContentType  =   " application/msword "
     Case   " .zip "
    ContentType  =   " application/zip "
     Case   " .xls "
    ContentType  =   " application/vnd.ms-excel "
     Case   " .gif "
    ContentType  =   " image/gif "
     Case   " .jpg " ,  " jpeg "
    ContentType  =   " image/jpeg "
     Case   " .wav "
    ContentType  =   " audio/wav "
     Case   " .mp3 "
    ContentType  =   " audio/mpeg3 "
     Case   " .mpg " ,  " mpeg "
    ContentType  =   " video/mpeg "
     Case   " .rtf "
    ContentType  =   " application/rtf "
     Case   " .htm " ,  " html "
    ContentType  =   " text/html "
     Case   " .asp "
    ContentType  =   " text/asp "
     Case   Else
     ' Handle All Other Files
    ContentType  =   " application/octet-stream "
End   Select
' Response.AddHeader "Content-Disposition", "attachment; filename= "&strFileName&""
Response.AddHeader  " Content-Length " , strFileSize
Response.Charset  =   " UTF-8 "   '  客户端浏览器的字符集UTF-8
Response.ContentType  =  ContentType

Response.BinaryWrite objStream.Read
Response.Flush

objStream.Close
Set  objStream  =   Nothing
% >