File Upload to AS400 using FtpWebRequest

I’m attempting to upload a file to AS400 using C#. The structure is:

ftp_server_ip_address/library/table

E.g.:

10.123.1.23/ABCD/XYZ

FileName : sample.txt

The AS400 table has same fields as my file layout. I am able to successfully upload file using FTP commands using PUT command as below.

ftp> open 10.123.1.23
ftp> username
ftp> password
ftp> cd ABCD
ftp> put c:/sample.txt ABCD/XYZ

I get a success message.

But when I try using FtpWebRequest, I get a 550 :” File unavailable or no access” error message.

I’m not sure how to construct the URI. Currently, my code looks like

FtpWebRequest ftpRequest = (FtpWebRequest)WebRequest.Create(@"ftp://110.123.1.23/ABCD” + file.Name);

Also, I'm unable to browse to the FTP folder using Internet Explorer or Windows Explorer. I get the same 550 error. Any help is much appreciated.

Solution

You're constructing the URL a bit wrong, you're missing a / before the file name, should probably be like this;

FtpWebRequest ftpRequest = 
    (FtpWebRequest)WebRequest.Create(@"ftp://110.123.1.23/ABCD/” + file.Name);

You're also not storing in the same directory as your interactive example;

ftp> cd ABCD
ftp> put c:/sample.txt ABCD/XYZ

will store the file XYZ in the directory ABCD/ABCD, not just ABCD as in your URL example.