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FTP WebException-URI for this command invalid

I have a very simple piece of code.
Everything is correctly written, no typos, and i chattet with a coworker but both of us have simply no idead where the error lies in here.
It smoothly goes through undtil the GetRequestStream() where the exception pops up. It finds the files, encodes it correctly but then can't seem to connect with the server.
This is the code:
public class WebRequestUploadExample
{
public void WebRequestUpload()
{
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(#"ftp://xxxxx");
request.Method = WebRequestMethods.Ftp.UploadFile;
// This example assumes the FTP site uses anonymous logon.
request.Credentials = new NetworkCredential("xxxxx", "xxxxx");
// Copy the contents of the file to the request stream.
StreamReader sourceStream = new StreamReader(#"D:\ftpTest\Test\Test.txt");
byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
sourceStream.Close();
request.ContentLength = fileContents.Length;
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();
}
}

May be your target server does not support 'passive' mode. Have you tried active-mode? request.UsePassive = false;
FtpWebRequest.UsePassive

c# Upload to ftp with not created directorys on ftp server

This is the path I am trying to upload to the ftp server:
_ftp://ftp-server/products/productxx/versionxx/releasexx/delivery/data.zip
The problem is that the folders "productxx/versionxx/releasexx/delivery/" do not exist on the server.
Can I create them automatically while uploading the .zip file in c#
My coding at the moment is:
FtpWebRequest request =
(FtpWebRequest)WebRequest.Create(pathToFtp);
// Method set to UploadFile
request.Method = WebRequestMethods.Ftp.UploadFile;
// set password and username
request.Credentials = new NetworkCredential(UserName, Password);
// write MemoryStream in ftpStream
using (Stream ftpStream = request.GetRequestStream())
{
memoryStream.CopyTo(ftpStream);
}
I am getting the System.Net.WebException: "Can't connect to FTP: (553) File name not allowed" at "using (Stream ftpStream =request.GetRequestStream())"
but if my pathToFtp is _ftp://ftp-server/products/data.zip it´s working well

One of the request methods available is WebRequestMethods.Ftp.MakeDirectory. You should be able to use that to do what you want.
Something like this (though I've not tested it), should do the trick:
async Task CreateDirectory(string path)
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(path);
request.Method = WebRequestMethods.Ftp.MakeDirectory;
using (var response = (FtpWebResponse)(await request.GetResponseAsync()))
{
Console.WriteLine($"Created: {path}");
}
}
It's answered in more detail here How do I create a directory on ftp server using C#?

How can I get file from FTP (using C#)?

Now I know how to copy files from one directory to another, this is really simple.
But now I need to do the same with files from FTP server. Can you give me some example how to get file from FTP while changing its name?

Take a look at How to: Download Files with FTP or downloading all files in directory ftp and c#
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://www.contoso.com/test.htm");
request.Method = WebRequestMethods.Ftp.DownloadFile;
// This example assumes the FTP site uses anonymous logon.
request.Credentials = new NetworkCredential ("anonymous","janeDoe#contoso.com");
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
Console.WriteLine(reader.ReadToEnd());
Console.WriteLine("Download Complete, status {0}", response.StatusDescription);
reader.Close();
reader.Dispose();
response.Close();
Edit
If you want to rename file on FTP Server take a look at this Stackoverflow question

Easiest way
The most trivial way to download a binary file from an FTP server using .NET framework is using WebClient.DownloadFile.
It takes an URL to the source remote file and a path to the target local file. So you can use a different name for the local file, if you need that.
WebClient client = new WebClient();
client.Credentials = new NetworkCredential("username", "password");
client.DownloadFile(
"ftp://ftp.example.com/remote/path/file.zip", #"C:\local\path\file.zip");
Advanced options
If you need greater control, that WebClient does not offer (like TLS/SSL encryption, ASCII mode, active mode, etc), use FtpWebRequest. Easy way is to just copy an FTP response stream to FileStream using Stream.CopyTo:
FtpWebRequest request =
(FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
request.Credentials = new NetworkCredential("username", "password");
request.Method = WebRequestMethods.Ftp.DownloadFile;
using (Stream ftpStream = request.GetResponse().GetResponseStream())
using (Stream fileStream = File.Create(#"C:\local\path\file.zip"))
{
ftpStream.CopyTo(fileStream);
}
Progress monitoring
If you need to monitor a download progress, you have to copy the contents by chunks yourself:
FtpWebRequest request =
(FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
request.Credentials = new NetworkCredential("username", "password");
request.Method = WebRequestMethods.Ftp.DownloadFile;
using (Stream ftpStream = request.GetResponse().GetResponseStream())
using (Stream fileStream = File.Create(#"C:\local\path\file.zip"))
{
byte[] buffer = new byte[10240];
int read;
while ((read = ftpStream.Read(buffer, 0, buffer.Length)) > 0)
{
fileStream.Write(buffer, 0, read);
Console.WriteLine("Downloaded {0} bytes", fileStream.Position);
}
}
For GUI progress (WinForms ProgressBar), see:
FtpWebRequest FTP download with ProgressBar
Downloading folder
If you want to download all files from a remote folder, see
C# Download all files and subdirectories through FTP.

C# FTP app uploads to local directory

I've just written a simple FTP console app to upload files on a local server to a remote FTP site. Everything seems to be working fine until it comes to actually transferring the file. For some reason instead of uploading the file to the specified FTP site it stores the entire file locally with no in the Debug folder with no file type and named the same as the ip of the FTP site. I'm thinking that this has something to do with Visual Studio's debugging. Can anybody give me some guidance on this?
Here is the code I'm using to attempt to upload each file in a string array to the FTP site.
private static void Upload(string ftpServer, string userName, string password, string filename)
{
using (var client = new WebClient())
{
client.Credentials = new NetworkCredential(userName, password);
client.UploadFile(ftpServer, "STOR", filename);
}
}

Use this method instead of that one,it worked for me.
//Directory sands for Remote Server Directory ,it must create if dir not exist
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://serverIP/directory/file");
request.Method = WebRequestMethods.Ftp.UploadFile;
request.Credentials = new NetworkCredential ("username","password");
// Copy the contents of the file to the request stream.
StreamReader sourceStream = new StreamReader("testfile.txt");
byte [] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
sourceStream.Close();
request.ContentLength = fileContents.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(fileContents, 0, fileContents.Length);
requestStream.Close();
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
response.Close();
source- http://msdn.microsoft.com/en-us/library/ms229715.aspx

Try this way instead: http://msdn.microsoft.com/en-us/library/ms229715.aspx

Using ftp in C# to send a file

I'm trying to send a file using ftp. I have the following code:
string server = "x.x.x.x"; // Just the IP Address
FileStream stream = File.OpenRead(filename);
byte[] buffer = new byte[stream.Length];
WebRequest request = WebRequest.Create("ftp://" + server);
request.Method = WebRequestMethods.Ftp.UploadFile;
request.Credentials = new NetworkCredential(username, password);
Stream reqStream = request.GetRequestStream(); // This line fails
reqStream.Write(buffer, 0, buffer.Length);
reqStream.Close();
But when I run it, I get the following error:
The requested URI is invalid for this FTP command.
Please can anyone tell me why? Am I using this incorrectly?

I think you need to specify the path and filename you're uploading too, so I think it should be either of:
WebRequest request = WebRequest.Create("ftp://" + server + "/");
WebRequest request = WebRequest.Create("ftp://" + server + "/filename.ext");

When I had to use ftp method, I had to set some flags on request object, without it the function did not work:
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpPath);
request.KeepAlive = true/false;
request.UsePassive = true/false;
request.UseBinary = xxx;
These flags depend on the server, if you have no access to the server then you cannot know what to use here, but you can test and see what works in your configuration.
And file name is probably missing at the end of URI, so that the server knows where to save uploaded file.