using ftpWebRequest with an error: the remote server returned error 530 not logged in

问题

I am trying to use the ftpWebRequest in c# my code is

// Get the object used to communicate with the server.
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://192.168.20.10/file.txt");
            request.Method = WebRequestMethods.Ftp.UploadFile;

            // This example assumes the FTP site uses anonymous logon.
            request.Credentials = new NetworkCredential("dev\ftp", "devftp");

            // Copy the contents of the file to the request stream.
            StreamReader sourceStream = new StreamReader(@"\file.txt");
            byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
            sourceStream.Close();
            request.ContentLength = fileContents.Length;
            request.UsePassive = true;
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(fileContents, 0, fileContents.Length);
            requestStream.Close();

            FtpWebResponse response = (FtpWebResponse)request.GetResponse();

            Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);

            response.Close();

and I get an Error in request.GetRequestStream(); the error is: the remote server returned error 530 not logged in if I try to go in to a browser page and in the url I write ftp://192.168.20.10/ the brows page is asking me for a name and password, I put the same name and password and I see all the files and folders in the ftp folder.

回答1:

Shouldn't the line:

request.Credentials = new NetworkCredential("dev\ftp", "devftp");

be:

request.Credentials = new NetworkCredential("dev\\ftp", "devftp");

or:

request.Credentials = new NetworkCredential(@"dev\ftp", "devftp");

I have to believe this may be causing your issues because the \f is a form feed character.

回答2:

Faced the same issue, here's my solution:

request.Credentials = new NetworkCredential(
    usernameVariable.Normalize(),passwordVariable.Normalize(),domainVariable.Normalize());

Details can be found here

Hope it helps.

回答3:

I found out that when connecting via .NET/C# to a FTP-server some characters are not "valid". After setting the login credentials to only only letters and numbers [a-Z0-9] it worked to log in.

回答4:

Just remove the double quote from username or password because sometimes $ sign in username or password causes problem. Its good to use single quote every time.

回答5:

If you assume anonymous logon do not set network credentials. this was the root of my problems.

来源：https://stackoverflow.com/questions/10352165/using-ftpwebrequest-with-an-error-the-remote-server-returned-error-530-not-logg

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ftpwebrequest