Ciao a tutti, su questo script vorrei introdurre un controllo per l'esistenza di un file. Lo script è il seguente:

codice:
<%
' //// dichiarazione delle variabili obbligatoria
option explicit

' //// dichiaro le variabili
Dim folder
Dim titolo_file
Dim nom_file
Dim byteCount
Dim RequestBin
Dim PosBeg
Dim i
Dim char
Dim PosEnd
Dim boundary
Dim boundaryPos
Dim Pos
Dim intCount
Dim Name
Dim PosFile
Dim PosBound
Dim Value
Dim FileName
Dim ContentType
Dim nome_file
Dim Conn
Dim filepathname
Dim ScriptObject
Dim MyFile
Dim Sql
Dim Rs 
Dim cod
Dim val
Dim username
Dim FileObject 
Dim objFile

' VERIFICHIAMO SE L'UTENTE E' IDENTIFICATO (LOGGATO)

IF Session("Loggato") = False and Session("Username") = "" then
' UTENTE NON LOGGATO
' (SESSION "LOGGATO" = FALSE E LA SESSION "USERNAME" NON HA NESSUN VALORE)

' PORTA L'UTENTE NELLA PAGINA LOGIN.ASP
' PER FARLO IDENTIFICARE

Response.Redirect "animazione/login.asp"
End IF


' //// Directory dove verrà caricato il file (la cartella deve avere i permessi in scrittura)
cod=request.querystring("cod")
val=request.querystring("val")
username = Session("username")
folder = "Archivi/"&username&"/"&val&""

'	Response.write(folder)

Response.Expires=0
Response.Buffer = TRUE
Response.Clear

Sub BuildUploadRequest(RequestBin)
	PosBeg = 1
	PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(13)))
	boundary = MidB(RequestBin,PosBeg,PosEnd-PosBeg)
	boundaryPos = InstrB(1,RequestBin,boundary)
		Do until (boundaryPos=InstrB(RequestBin,boundary & getByteString("--")))
		Dim UploadControl
		Set UploadControl = CreateObject("Scripting.Dictionary")
		'Get an object name
		Pos = InstrB(BoundaryPos,RequestBin,getByteString("Content-Disposition"))
		Pos = InstrB(Pos,RequestBin,getByteString("name="))
		PosBeg = Pos+6
		PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(34)))
		Name = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
			PosFile = InstrB(BoundaryPos,RequestBin,getByteString("filename="))
			PosBound = InstrB(PosEnd,RequestBin,boundary)
			If  PosFile<>0 AND (PosFile<PosBound) Then
			PosBeg = PosFile + 10
			PosEnd =  InstrB(PosBeg,RequestBin,getByteString(chr(34)))
			FileName = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
			UploadControl.Add "FileName", FileName
			Pos = InstrB(PosEnd,RequestBin,getByteString("Content-Type:"))
			PosBeg = Pos+14
			PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(13)))
			ContentType = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
			UploadControl.Add "ContentType",ContentType
			PosBeg = PosEnd+4
			PosEnd = InstrB(PosBeg,RequestBin,boundary)-2
			Value = MidB(RequestBin,PosBeg,PosEnd-PosBeg)
			Else
			Pos = InstrB(Pos,RequestBin,getByteString(chr(13)))
			PosBeg = Pos+4
			PosEnd = InstrB(PosBeg,RequestBin,boundary)-2
			Value = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
		End If
		UploadControl.Add "Value" , Value	
		UploadRequest.Add name, UploadControl	
		BoundaryPos=InstrB(BoundaryPos+LenB(boundary),RequestBin,boundary)
	Loop
End Sub
Function getByteString(StringStr)
 For i = 1 to Len(StringStr)
 	char = Mid(StringStr,i,1)
	getByteString = getByteString & chrB(AscB(char))
 Next
End Function
Function getString(StringBin)
 getString =""
 For intCount = 1 to LenB(StringBin)
	getString = getString & chr(AscB(MidB(StringBin,intCount,1))) 
 Next
End Function

byteCount = Request.TotalBytes

RequestBin = Request.BinaryRead(byteCount)
Dim UploadRequest
Set UploadRequest = CreateObject("Scripting.Dictionary")
BuildUploadRequest  RequestBin

' //// Fine Componente Upload  

' //// riempio le variabili con valori proveninti dalla form
titolo_file = UploadRequest.Item("titolo_file").Item("Value")
nome_file   = UploadRequest.Item("nome_file").Item("Value")

' //// controllo che la form sia state regolarmente popolata
If IsNull(nome_file) OR nome_file = "" OR IsNull(titolo_file) OR titolo_file = "" Then
	Response.Write ("<center>
CAMPI OBBLIGATORI!

RITORNA</center>")
	Response.End
End if

Set objFile = Server.CreateObject ("Scripting.FileSystemObject")
If objFile.FileExists (Server.MapPath(nome_file)) Then
  Response.Write "Il file esiste!"
  
End If
Set objFile = Nothing

' //// connessione al DB
'Set Conn=Server.CreateObject("ADODB.Connection")
'	Conn.Open "PROVIDER=MSDASQL;" & _
'	"DRIVER={Microsoft Access Driver (*.mdb)}; " & _
'	"DBQ=" & server.mappath("/mdb-database/database.mdb")
Set Conn=Server.CreateObject("ADODB.Connection")
Conn.Open "driver={Microsoft Access Driver (*.mdb)};dbq="& server.MapPath("mdb-database/aziende.mdb")

' //// creo il file nella folder
	if UploadRequest.Item("nome_file").Item("FileName")="" then

		Else

		contentType  = UploadRequest.Item("nome_file").Item("ContentType")
		filepathname = UploadRequest.Item("nome_file").Item("FileName")
		filename     = Right(filepathname,Len(filepathname)-InstrRev(filepathname,"\"))
		value        = UploadRequest.Item("nome_file").Item("Value")

	Set ScriptObject = Server.CreateObject("Scripting.FileSystemObject")
    
	Set MyFile = ScriptObject.CreateTextFile(Server.mappath(folder &"/"& filename))

			For i = 1 to LenB(value)
					MyFile.Write chr(AscB(MidB(value,i,1)))
					Next
			MyFile.Close

	End if

' //// seleziono la tabella dove scrivero l'ora, il titolo ed il nome del file
Sql = "Select * FROM upload"

Set Rs = Server.CreateObject("ADODB.Recordset")
	Rs.Open SQL, Conn, 1, 2

' //// aggiugo un nuovo record alla tabella
Rs.AddNew
	Rs("data") = date()
	Rs("titolo_file") = titolo_file
	Rs("nome_file") = filename
	Rs("azienda") = val
Rs.UpDate

' //// chiudo il record set e libero le risorse
	Rs.Close
	Set Rs = Nothing

' //// chiudo la connessione e libero le risorse
	Conn.Close
	Set Conn = Nothing

' //// carico la pagina di risposta e stampo a video il link al file caricato
dim myurl

    myurl = "animazione/gestione/upindex.asp?"
	myurl =myurl & "cod=" & cod
	myurl =myurl & "&val=" & val
	
	Response.redirect(myurl)
%>
ora dove e come posso secondo voi collocare

codice:
Set objFile = Server.CreateObject ("Scripting.FileSystemObject")
If objFile.FileExists (Server.MapPath(nome_file)) Then
  Response.Write "Il file esiste!"
  Response.End
End If
Set objFile = Nothing
Ho provato parecchi modi ma mi restituisce sempre

"Errore di run-time di Microsoft VBScript (0x800A01B6)
Proprietà o metodo non supportati dall'oggetto"

Grazie in anticipo!