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File.Exists always returns false

barnetjeb
barnetjeb asked
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Last Modified: 2007-12-19
I have a web app on a server.  I want to get a file from another machine.  I'm trying to do something like...

If file.exists("\\machine2\import\myfile.txt") then
   response.write("yes")
Else
   response.write("no")
End if

It always returns no.  Am I able to do this?

Thanks
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What language are you trying to write this in?  Javascript?  PHP?  C#?

Commented:
Can you access the file if you use the same string in the explorer

Commented:
It may be a permissions issue, if you are running this from asp make sure the impersonated account has permissions. Most likely it will be the local ASP service account (which can't have permissions to network resources) so you would either have to change the account or use another authentication scheme (good for Intranet apps)
erm.. try to change the code into these
>>
If file.exists("\\\\machine2\\import\\myfile.txt") then
   response.write("yes")
Else
   response.write("no")
End if

probably the problem is with the backslash in the code.

hope it help

Commented:
That's only for Server Side JScript. The If syntax and improper casing suggests VBScript

Commented:
The file has to be accessible from the WEB SERVER, not your machine. Chances are it's not.

And even then, it's difficult to make a network connection work. The IUSR_machine account rarely has network access.
Hi barnetjeb,

Maybe this will help:

   Dim fso
   Set fso = CreateObject("Scripting.FileSystemObject")
   If (fso.FileExists("\\machine2\import\myfile.txt")) then
       response.write("yes")
   Else
       response.write("no")
   End if
   Set fso = Nothing

If that doesn't work, try this:

   Dim fso, theFile
   Set fso = CreateObject("Scripting.FileSystemObject")
   theFile = Server.MapPath("\\machine2\import\myfile.txt")
   If (fso.FileExists(theFile)) then
       response.write("yes")
   Else
       response.write("no")
   End if
   Set fso = Nothing

Commented:
I doubt server.mapPath will work.

It will return something like this....
C:\inetpub\\\machine2\import\myfile.txt

Not a valid path.

Author

Commented:
OK here is what I tried...

Server.MapPath only works when you are using a relative path.  You cannot do \\machinename, and you cannot map a drive and do something like g:\.

When I run the application from the computer, it works fine.  ie. If I'm on my development machine and I run it sees the path and returns yes.  If I go to another machine and bring up the application on my machine it doesn't work..it returns no.

I can see the path fine in Windows Explorer.

The directory currently has full network access for everyone.

My web.config file has <identity impersonate="true" />.  Is there somewhere else I need to change?

Here is what I'm wondering.  Is this actually running as a computer user as opposed to a domain user (ie. ASPNET, and since that computer is giving network access to everyone (which I presume means everyone in the domain) it doesn't recognize it?  I'm sure that is what it is, something to do which permissions, but I don't know where or what to change to make this work.

Thanks for all the suggestions.  I look forward to your replies.

Author

Commented:
I'm Using VB.NET
Commented:
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Commented:
Also note: the Code you gave us will not compile in VB.NET. You HAVE to be using VBScript in ASP Classic.

Author

Commented:
No I'm using VB.NET.  What doesn't compile about it.  It compiles fine for me.

Author

Commented:
I'm not using classic ASP.  Will the solution you posted still work for me?

Commented:
barnetjeb, I aplogize.

I had made an incorrect assuption and then confused TheKenman's post (Which is ASP Classic) with your own.

Yes the steps I gave you will work if you keep your web.config as it is
regarding
<identity impersonate="true" />

Author

Commented:
Thanks GoSu,
I will give this a try and tell you how I make out within a day or so.  I thought my problem had something to do with that, but I just didn't know where to change these settings.  Thanks again.
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