Upload a File with FTP

FTP is an old, but ever-popular file transfer mechanism, and .NET supports it out of the box with the WebClient, which will see the “ftp://” part of the URL and internally use a FtpWebRequest to perform the communication.

string host = "ftp.myFtpSite.com";
string username = "anonymous";
string password = "your@email.com";
string file = "myLocalFile.txt";
if (!host.StartsWith("ftp://"))
{
    host = "ftp://" + host;
}
Uri uri = new Uri(host);
System.IO.FileInfo info = new System.IO.FileInfo(file);
string destFileName = host + "/" + info.Name;
try
{
    //yes, even though this is FTP, we can use the WebClient
    //it will see the ftp:// and use the appropriate protocol
    //internally
    WebClient client = new WebClient();
    client.Credentials = new NetworkCredential(username, password);
    byte[] response = client.UploadFile(destFileName, file);
    if (response.Length > 0)
    {
        Console.WriteLine("Response: {0}",
                          Encoding.ASCII.GetString(response));
    }
}
catch (WebException ex)
{
    Console.WriteLine(ex.Message);
}

					    

There is also an asynchronous version of UploadFile.