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

Tags:

c#

.net

ftp

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?

like image 752
revolutionkpi Avatar asked Dec 26 '11 15:12

revolutionkpi


2 Answers

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","[email protected]");

            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

like image 83
Haris Hasan Avatar answered Sep 20 '22 21:09

Haris Hasan


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.

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Martin Prikryl Avatar answered Sep 17 '22 21:09

Martin Prikryl