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Hi everyone!

I need some verification on ftp connections. Below is what I have so far to keep the connection alive and open:

FTPWebRequest request = (FtpWebRequest)WebRequest.Create("url");
request.KeepAlive = true;
request.ReadWriteTimeout = 600000;

My goal is to be able to keep the connection open indefinitely until all of the files have been uploaded via FTP successfully. Do I have the code correct? If my goal isn't possible, is the only way to accomplish this to raise the readwritetimeout time very high?

Thanks everyone!

1 solution


FTPWebRequest.KeepAlive property will let you specify a boolean value whether the control connection to the FTP server is closed after the request completes.

FTPWebRequest.ReadWriteTimeout property will let you specify the number of milliseconds before the reading or writing times out. The default value is 300,000 milliseconds (5 minutes).
If your file are very big and/or you have a slow internet connection this can be a problem.

You can try upload the files asynchronously.

Please read the class documentation here.

Sample code to upload a file to a ftp server:
FtpWebRequest ftpRequest;
FtpWebResponse ftpResponse;

    //Settings required to establish a connection with the server
    this.ftpRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://ServerIP/FileName"));
    this.ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
    this.ftpRequest.Proxy = null;
    this.ftpRequest.UseBinary = true;
    this.ftpRequest.Credentials = new NetworkCredential("UserName", "Password");
    //Selection of file to be uploaded
    FileInfo ff = new FileInfo("File Local Path With File Name");//e.g.: c:\\Test.txt
    byte[] fileContents = new byte[ff.Length];
    //will destroy the object immediately after being used
    using (FileStream fr = ff.OpenRead())
        fr.Read(fileContents, 0, Convert.ToInt32(ff.Length));
    using (Stream writer = ftpRequest.GetRequestStream())
        writer.Write(fileContents, 0, fileContents.Length);
    //Gets the FtpWebResponse of the uploading operation
    this.ftpResponse = (FtpWebResponse)this.ftpRequest.GetResponse(); 
    Response.Write(this.ftpResponse.StatusDescription); //Display response
catch (WebException webex)
    this.Message = webex.ToString();

Share this answer
joshrduncan2012 21-Jun-13 16:13pm    
Thanks JAFC!

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