The remote server returned an error (550) file unavailable (e.g. File not found no access)

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C#4.0

.NET4

Hello,

The remote server returned an error (550) file unavailable (e.g. file not found no access).

When i am downloading two files one is 21 bytes only Date.txt file and another one around 2 GB .zip file.
Zip file downloading successfully but when Date.txt was downloading so its getting error:
Please help me.

How it can be resolve?

Thanks in Advance.
Ankit Agarwal
Software Engineer

What I have tried:

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
string[] files = ReadFileList();
                    FTPSettings.IP = "xx.xx.xxx.xxx/TextureData";
                    FTPSettings.UserID = "xxxx";
                    FTPSettings.Password = "xxx";
                    //FtpWebRequest reqFTP = null;
                    //Stream ftpStream = null;
                    foreach (string file in files)
                    {
                        //string fileName = e.Argument.ToString();

                        FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://" + FTPSettings.IP + "/" + file);
                        request.Credentials = new NetworkCredential(FTPSettings.UserID, FTPSettings.Password);
                        request.Method = WebRequestMethods.Ftp.GetFileSize;
                        request.Proxy = null;
 
                        long fileSize; // this is the key for ReportProgress
                        using (WebResponse resp = request.GetResponse())
                            fileSize = resp.ContentLength;
 
                        request = (FtpWebRequest)WebRequest.Create("ftp://" + FTPSettings.IP + "/" + file);
                        request.Credentials = new NetworkCredential(FTPSettings.UserID, FTPSettings.Password);
                        request.Method = WebRequestMethods.Ftp.DownloadFile;
                        using (FtpWebResponse responseFileDownload = (FtpWebResponse)request.GetResponse())
                        using (Stream responseStream = responseFileDownload.GetResponseStream())
 
                        using (FileStream writeStream = new FileStream(@"C:\Program Files (x86)\xxxx\" + file, FileMode.Create))
                        {
 
                            int Length = 2048;
                            Byte[] buffer = new Byte[Length];
                            int bytesRead = responseStream.Read(buffer, 0, Length);
                            int bytes = 0;
 
                            while (bytesRead > 0)
                            {
                                writeStream.Write(buffer, 0, bytesRead);
                                bytesRead = responseStream.Read(buffer, 0, Length);
                                bytes += bytesRead;// don't forget to increment bytesRead !
                                int iProgress = 0;
                                int totalSize = (int)(fileSize) / 1000; // Kbytes
                                if (totalSize > 0)
                                {
                                    iProgress = (bytes / 1000) * 100 / totalSize;
                                }
                                backgroundWorker1.ReportProgress(iProgress, totalSize);
 
                            }
                        }
                        string zipFileExtension = Path.GetExtension(file);
                        if (zipFileExtension == ".zip")
                        {
 
                            string zipToUnpack = @"C:\Program Files (x86)\xxxx\" + file;
                            string unpackDirectory = @"C:\Program Files (x86)\xxxx\";
                            using (ZipFile zip1 = ZipFile.Read(zipToUnpack))
                            {
                                foreach (ZipEntry ze in zip1)
                                {
                                    ze.Extract(unpackDirectory, ExtractExistingFileAction.OverwriteSilently);
                                }
                            }
                        }
 
                    }
 
}
 

 public static class FTPSettings
        {
            public static string IP { get; set; }
            public static string UserID { get; set; }
            public static string Password { get; set; }
        }
 

 
public string[] ReadFileList()
        {
            //Debugger.Break();
            string[] mydownloadFiles;
            StringBuilder myresult = new StringBuilder();
            //WebResponse myresponse = null;
            StreamReader myreader = null;
            FtpWebRequest myreqFTP = null;
            try
            {
 
                FTPSettings.IP = "xx.xx.xxx.xxx/TextureData";
                FTPSettings.UserID = "xxxx";
                FTPSettings.Password = "xxxx";
                myreqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + FTPSettings.IP + "/"));
                myreqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                myreqFTP.UseBinary = true;
 
                myreqFTP.Credentials = new NetworkCredential(FTPSettings.UserID, FTPSettings.Password);
                FtpWebResponse response = (FtpWebResponse)myreqFTP.GetResponse();
                myreader = new StreamReader(response.GetResponseStream());
                string myline = myreader.ReadLine();
                while (myline != null)
                {
                    myresult.Append(myline);
                    myresult.Append("\n");
                    myline = myreader.ReadLine();
                }
                // to remove the trailing '\n'
                myresult.Remove(myresult.ToString().LastIndexOf('\n'), 1);
                return myresult.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                if (myreader != null)
                {
                    myreader.Close();
                }
                mydownloadFiles = null;
                return mydownloadFiles;
            }