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Stream interface to a file on SFTP server in C# SSH.NET

I am connecting to an SFTP server using SSH.NET and trying to read an image into a stream for displaying it in my web page.
SftpClient client = connectToServer(IP,user,pwd);
string remotePath = client.WorkingDirectory.ToString() + dto.Directory + "/";
FileStream fs = new FileStream(remotePath + dto.FileName,FileMode.Open);
Stream strm = fs;
The above code throws an invalid characters exception. I am not sure if the reason for it is because of the filename on the server i.e. all these files are stored with * delimiter i.e. Text1*Text2*Text3.00.png.
If it is, is there any other way to read the stream?
I have also tried to read from HttpResponse.OutputStream but that throws a read/seek invalid exception.
HttpResponse response = HttpContext.Current.Response;
Stream strm = response.OutputStream;
Are there any other ways to read such image files?
This is the working code code for the same functionality using FtpWebRequest.
var request = (FtpWebRequest)WebRequest.Create(serverUri);
request.UsePassive = true;
request.UseBinary = true;
request.Credentials =//
request.Method = WebRequestMethods.Ftp.DownloadFile;
response = (FtpWebResponse)await request.GetResponseAsync();
Stream responseStream = response.GetResponseStream();
I am changing it to SFTP using SSH.NET.
Is there a way to get the same output as GetResponseStream() with SSH.NET?

If you need to obtain Stream API to a file on SFTP server, use SSH.NET SftpClient.Open[Read]:
Stream fs = client.OpenRead(remotePath);

Fill ComboBox with names of files from a directory on FTP server

I have a file folder in my FTP server and I want to fill a ComboBox with the contents inside of that folder. How would I go about doing this?
string result = string.Empty;
//Request location and server name---------->
FtpWebRequest request =
(FtpWebRequest)WebRequest.Create("ftp://*******" +"/" + "Products" + "/");
//Lists directory
request.Method = WebRequestMethods.Ftp.ListDirectory;
// set credentials
request.Credentials = new NetworkCredential("user1","1234");
//initialize response
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
//reader to read response
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
combobox1.Text = FTP_Server();
//data from file.
result = reader.ReadToEnd();
reader.Close();
response.Close();
Thanks! I didn't know if this was even possible!

Read the listing by lines:
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://example.com/remote/path/");
request.Method = WebRequestMethods.Ftp.ListDirectory;
request.Credentials = new NetworkCredential("username", "password");
comboBox1.BeginUpdate();
try
{
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
using (Stream stream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(stream))
{
while (!reader.EndOfStream)
{
comboBox1.Items.Add(reader.ReadLine());
}
}
}
finally
{
comboBox1.EndUpdate();
}
Downloading whole listing to a string and splitting it afterwards (as suggested by the other answer) can be pretty ineffective, if there's lot of entries.

Without knowing the exact format of your response string, my instinct would be to split the response string:
string files[] = result.Split("\r\n");
Then to iterate over the individual files, adding them to your combobox1's Items:
// Depending on how many items you're adding, you may wish to prevent a repaint until the operation is finished
combobox1.BeginUpdate();
foreach(string file in files)
{
combobox1.Items.Add(file);
}
combobox1.EndUpdate();
That should take care of it for you! There is some excellent (and exhaustive) documentation on MSDN as well, which will often contain some usage examples to help you out further: https://msdn.microsoft.com/en-us/library/system.windows.forms.combobox(v=vs.110).aspx#Examples
Note that, if you end up wanting to display information from a different FTP response, you'll have to clear the combobox1 like so first: combobox1.Items.Clear();

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