Error on using # in the filename in C# ftp directory

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the remote server returned an error(550 file unavailable).
as far as i am aware of # can be used in naming files then why do i get error to access files and folders that have # in their name?
get error here on getrequeststream();

What I have tried:

FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri(string.Format("{0}/{1}", server, fileName)));
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(userName, passowrd);
            Stream ftpStream = request.GetRequestStream();

Posted 19-Jul-19 0:04am

Member 12899279

Updated 19-Jul-19 5:57am

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Member 12899279 19-Jul-19 6:13am

FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri(string.Format("{0}/{1}", server, fileName)));
request.Method = WebRequestMethods.Ftp.UploadFile;
request.Credentials = new NetworkCredential(userName, passowrd);
Stream ftpStream = request.GetRequestStream();
FileStream fs = File.OpenRead(fullName);
byte[] buffer = new byte[1024];
double total = (double)fs.Length;
int byteRead = 0;
double read = 0;
do
{
if (!backgroundWorker1.CancellationPending)
{
byteRead = fs.Read(buffer, 0, 1024);
ftpStream.Write(buffer, 0, byteRead);
read += (double)byteRead;
double percentage = read / total * 100;
backgroundWorker1.ReportProgress((int)percentage);
}
}
while (byteRead != 0);
fs.Close();
ftpStream.Close();

Richard MacCutchan 19-Jul-19 6:44am

Try it without the # character.

Member 12899279 19-Jul-19 6:57am

offcourse i tried it for files and folder without # and that works fine but that's not the solution i have many folders and files which i want to use and have # in their name

Richard MacCutchan 19-Jul-19 8:06am

Try using the control code &num; instead of the hash character. Although there may be some other reason why the server rejects it.

MadMyche 19-Jul-19 8:07am

or %23

Richard MacCutchan 19-Jul-19 8:14am

Of course, I forgot about those ones.

Member 12899279 19-Jul-19 10:23am

are you saying that i should use % instead of #?if no then kindly type what are you saying for e.g i have a folder named C# now how i should enter it to avoid this error?

Richard MacCutchan 19-Jul-19 10:47am

Where did I say That?

Richard Deeming 19-Jul-19 10:12am

FtpWebRequest is a really poorly designed API. It's modelled after the HTTP version, which is a stateless protocol, whereas FTP is a stateful protocol.

I'd suggest using a proper FTP library instead - for example, FluentFTP[^].

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MadMyche · Answer 1 · 2019-07-19T01:24:00

The most likely reason is that while the # may be valid in a filename, it is used as a delimiter in a URL.
Reference: https://www.ietf.org/rfc/rfc1738.txt[^]

RFC 1738, published December 1994
Unsafe:
Characters can be unsafe for a number of reasons.

The space character is unsafe because significant spaces may disappear and insignificant spaces may be introduced when URLs are transcribed or typeset or subjected to the treatment of word-processing programs.

The characters "<" and ">" are unsafe because they are used as the delimiters around URLs in free text; the quote mark (""") is used to delimit URLs in some systems.

The character "#" is unsafe and should always be encoded because it is used in World Wide Web and in other systems to delimit a URL from a
fragment/anchor identifier that might follow it.

The character "%" is unsafe because it is used for encodings of other characters.

Other characters are unsafe because gateways and other transport agents are known to sometimes modify such characters. These characters are "{", "}", "|", "\", "^", "~", "[", "]", and "`".

Member 12899279 · Answer 2 · 2019-07-19T05:58:00

Solution 2

string nn = comboBox1.Text.ToString();
           string name2;
           if (nn.Contains("#"))
           {
                name2= nn.Replace("#", "%23");
           }
           else
           {
               name2=nn;
           }

got this as a temporary fix.

Posted 19-Jul-19 5:58am