<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
'定义全局变量保存用户上传的内容'
dim strmUpload
'自定义class处理上传文件'
Class FileUpload
dim Form,File
Private Sub Class_Initialize
dim iStart,iFileNameStart,iFileNameEnd,iEnd,vbEnter,iFormStart,iFormEnd,theFile
dim strDiv,mFormName,mFormValue,mFileName,mFileSize,mFilePath,iDivLen,mStr
if Request.TotalBytes<1 then Exit Sub
set Form=CreateObject("Scripting.Dictionary")
set File=CreateObject("Scripting.Dictionary")
set strmUpload=CreateObject("Adodb.Stream")
strmUpload.mode=3
strmUpload.type=1
strmUpload.open
strmUpload.write Request.BinaryRead(Request.TotalBytes)
'vbscript中的换行符字符串'
vbEnter=Chr(13)&Chr(10)
'换行符的位置'
iDivLen=InStrB(1,vbEnter)+1
'表单中不同控件数据的分隔字符串'
strDiv=SubStrB(1,iDivLen)
'表单有效数据开始位置'
iFormStart=iDivLen
'表单有效数据结束位置'
iFormEnd=InStrB(iformStart,strDiv)-1
'循环得到表单中所有控件的值'
while iFormStart < iFormEnd
'得到控件的name'
iStart=InStrB(iFormStart,"name=""")
iEnd=InStrB(iStart+6,"""")
mFormName=SubStrB(iStart+6,iEnd-iStart-6)
'得到file控件的filename'
iFileNameStart=InStrB(iEnd+1,"filename=""")
'如果是file控件'
if iFileNameStart>0 and iFileNameStart<iFormEnd then
iFileNameEnd=InStrB(iFileNameStart+10,"""")
mFileName=SubStrB(iFileNameStart+10,iFileNameEnd-iFileNameStart-10)
iStart=InStrB(iFileNameEnd+1,vbEnter&vbEnter)
iEnd=InStrB(iStart+4,vbEnter&strDiv)
'如果上传了文件'
if iEnd>iStart then
'得到上传文件的大小'
mFileSize=iEnd-iStart-4
else
mFileSize=0
end if
set theFile=new FileInfo
theFile.FileName=getFileName(mFileName)
theFile.FilePath=getFilePath(mFileName)
theFile.FileSize=mFileSize
theFile.FileStart=iStart+4
theFile.FormName=FormName
'将上传文件加入到file Directory中'
file.add mFormName,theFile
'如果不是file控件'
else
iStart=InStrB(iEnd+1,vbEnter&vbEnter)
iEnd=InStrB(iStart+4,vbEnter&strDiv)

if iEnd>iStart then
mFormValue=SubStrB(iStart+4,iEnd-iStart-4)
else
mFormValue=""
end if
'将控件的名、值加入到form Directory中'
form.Add mFormName,mFormValue
end if
'准备读取下一个控件值'
iFormStart=iformEnd+iDivLen
iFormEnd=InStrB(iformStart,strDiv)-1
wend
End Sub

'类终结'
Private Sub Class_Terminate
form.RemoveAll
file.RemoveAll
set form=nothing
set file=nothing
strmUpload.close
set strmUpload=nothing
End Sub


'从全文件名中解析出路径'
Private function GetFilePath(FullPath)
If FullPath <> "" Then
GetFilePath = left(FullPath,InStrRev(FullPath, "\"))
Else
GetFilePath = ""
End If
End function

'从全文件名中解析出短文件名'
Private function GetFileName(FullPath)
If FullPath <> "" Then
GetFileName = mid(FullPath,InStrRev(FullPath, "\")+1)
Else
GetFileName = ""
End If
End function

'返回子串
Private Function SubStrB(theStart,theLen)
dim i,c,stemp
strmUpload.Position=theStart-1
stemp=""
for i=1 to theLen
if strmUpload.EOS then Exit for
c=ascB(strmUpload.Read(1))
If c > 127 Then
if strmUpload.EOS then Exit for
stemp=stemp&Chr(AscW(ChrB(AscB(strmUpload.Read(1)))&ChrB(c)))
i=i+1
else
stemp=stemp&Chr(c)
End If
Next
SubStrB=stemp
End function

'返回指定字符串在strmUpload中的位置
Private Function InStrB(theStart,varStr)
dim i,j,bt,theLen,str
InStrB=0
'得到字节串
Str=toByte(varStr)
theLen=LenB(Str)
for i=theStart to strmUpload.Size-theLen
if i>strmUpload.size then exit Function
strmUpload.Position=i-1
if AscB(strmUpload.Read(1))=AscB(midB(Str,1)) then
InStrB=i
for j=2 to theLen
if strmUpload.EOS then
InStrB=0
Exit for
end if
if AscB(strmUpload.Read(1))<>AscB(MidB(Str,j,1)) then
InStrB=0
Exit For
end if
next
if InStrB<>0 then Exit Function
end if
next
End function

'将字符串转换成字节
Private function toByte(Str)
dim i,iCode,c,iLow,iHigh
toByte=""
For i=1 To Len(Str)
c=mid(Str,i,1)
iCode =Asc(c)
If iCode<0 Then iCode = iCode + 65535
If iCode>255 Then
iLow = Left(Hex(Asc(c)),2)
iHigh =Right(Hex(Asc(c)),2)
toByte = toByte & chrB("&H"&iLow) & chrB("&H"&iHigh)
Else
toByte = toByte & chrB(AscB(c))
End If
Next
End function
End Class


'自定义类FileInfo'
Class FileInfo
dim FormName,FileName,FilePath,FileSize,FileStart,DBContent
'类初始化'
Private Sub Class_Initialize
FileName = ""
FilePath = ""
FileSize = 0
FileStart= 0
FormName = ""
DBContent = ""
End Sub

'自定义方法，将上传文件保存到服务器指定目录'
Public function SaveAs(FullPath)
dim dr,ErrorChar,i
SaveAs=1
if trim(fullpath)="" or FileSize=0 or FileStart=0 or FileName="" then exit function
if FileStart=0 or right(fullpath,1)="/" then exit function
set dr=CreateObject("Adodb.Stream")
dr.Mode=3
dr.Type=1
dr.Open
strmUpload.position=FileStart-1
strmUpload.copyto dr,FileSize
dr.SaveToFile FullPath,2
dr.Close
set dr=nothing
SaveAs=0
End function

'自定义方法，将上传文件保存到数据库'
Public function Save2DB()
dim dr
if FileSize=0 or FileStart=0 or FileName="" then exit function
strmUpload.position=FileStart-1
DBContent = strmUpload.Read(FileSize)
End function
End Class
</SCRIPT>
（出处：Viphot）