FTPConnection.Exists(remotefile) doesn't work

Question

Hi,

I need to check to see if a file exists before uploading, I use the following code

FTPConnection ftp = new FTPConnection();   
ftp.ServerAddress = host;
ftp.UserName = user;
ftp.Password = password;
ftp.Connect();

if (!ftp.Exists("file1"))
{
   // upload file
}

If the file is not there I will get exception "Unable to determine if 'file1' exists.", but if the file is there it will work.

I'm using edtFTPnet v1.3. Thanks.

Answer 1

Interesting. Could you please post a DEBUG level log?

- Hans(EnterpriseDT)

Answer 2

Thanks. Here is the log:

DEBUG [FTPControlSocket] 25 Nov 2008 16:27:35.703 : ---> SIZE test.txt
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:36.125 : 550 Access denied.
DEBUG [FTPClient] 25 Nov 2008 16:27:36.125 : SIZE not supported
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:36.140 : ---> MDTM test.txt
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:36.484 : 550 Access denied.
DEBUG [FTPClient] 25 Nov 2008 16:27:36.484 : MDTM not supported
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:36.484 : ---> PORT 172,16,40,211,23,174
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:36.828 : 200 PORT command successful.
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:36.828 : ---> RETR test.txt
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:37.265 : 550 Access denied.
WARN [FTPClient] 25 Nov 2008 16:27:37.265 : Unable to determine if file 'test.txt' exists.
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:39.546 : ---> QUIT
DEBUG [FTPControlSocket] 25 Nov 2008 16:27:39.890 : 221 Goodbye. Control connection closed.

Answer 3

You get access denied for every operation.

You might need to try using GetFiles() and inspecting the list

Answer 4

Yes that's what I ended up doing.

BTW do you know why I'm getting the access deny error? Is it the FTP server? Thanks

Answer 5

Yes, that's the message sent by the FTP server. So for some reason your account doesn't permit you to do those operations on that file.