{

static class FtpHelper

{

private static FtpWebRequest request;

private static FtpWebResponse response;

private static Uri UriPath(string network)

{

return new Uri(string.Format("ftp://{0}", network));

}

/* 1st version of the method UploadFiles, used to upload one file. (KeepAlive = false) */

public static bool UploadFiles(string filePath, string networkPath, NetworkCredential credentials)

{

bool resultUpload = false;

System.Threading.Thread.Sleep(500);

Console.WriteLine("\nInitializing Network Connection..");

request = (FtpWebRequest)WebRequest.Create(UriPath(networkPath) + Path.GetFileName(filePath));

request.Method = WebRequestMethods.Ftp.UploadFile;

request.UsePassive = true;

request.KeepAlive = false;

request.Credentials = credentials;

/* set ssl protection? */

//request.EnableSsl = true;

using (Stream requestStream = request.GetRequestStream())

{

System.Threading.Thread.Sleep(500);

Console.WriteLine("\nReading the file " + Path.GetFileName(filePath) + "...");

using (StreamReader sourceStream = new StreamReader(filePath))

{

byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());

sourceStream.Close();

request.ContentLength = fileContents.Length;

requestStream.Write(fileContents, 0, fileContents.Length);

requestStream.Close();

}

}

using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())

{

System.Threading.Thread.Sleep(500);

Console.WriteLine("\nUpload of " + Path.GetFileName(filePath) + " file complete.");

Console.WriteLine("Request status: {0}", response.StatusDescription);

if (response.StatusDescription.Equals("226 Transfer complete.\r\n"))

resultUpload = true;

response.Close();

}

Console.WriteLine("\nClosing connection to {0}...", string.Format("ftp://{0}", networkPath));

return resultUpload;

}

/* 2nd version of the method UploadFiles, used to upload more than one file. You can notice the same request is opened until all the files are uploaded. (KeepAlive = true) */

public static bool[] UploadFiles(string[] filePath, string networkPath, NetworkCredential credentials)

{

bool[] resultUpload = new bool[filePath.Length];

resultUpload.Populate(false);

Console.WriteLine("\nInitializing Network Connection..");

System.Threading.Thread.Sleep(500);

for (int i = 0; i < filePath.Length; i++)

{

string currentFile = filePath[i].ToString();

request = (FtpWebRequest)WebRequest.Create(UriPath(networkPath) + Path.GetFileName(currentFile));

request.Method = WebRequestMethods.Ftp.UploadFile;

request.UsePassive = true;

request.KeepAlive = true;

request.Credentials = credentials;

/* set ssl protection? */

//request.EnableSsl = true;

using (Stream requestStream = request.GetRequestStream())

{

System.Threading.Thread.Sleep(500);

byte[] fileContents;

using (FileStream fs = new FileStream(currentFile, FileMode.Open))

{

System.Threading.Thread.Sleep(500);

Console.WriteLine("\nReading the file " + Path.GetFileName(currentFile) + "...");

fileContents = new byte[fs.Length];

int numBytesRead = 0;

int numBytesToRead = (int)fs.Length;

while (numBytesToRead > 0)

{

int n = fs.Read(fileContents, numBytesRead, numBytesToRead);

if (n == 0) break;

numBytesRead += n;

numBytesToRead -= n;

}

numBytesToRead = fileContents.Length;

fs.Close();

request.ContentLength = fileContents.Length;

}

requestStream.Write(fileContents, 0, fileContents.Length);

requestStream.Close();

}

response = (FtpWebResponse)request.GetResponse();

System.Threading.Thread.Sleep(500);

Console.WriteLine("\nUpload of the file " + Path.GetFileName(filePath[i]) + " complete.");

Console.WriteLine("Request status: {0}", response.StatusDescription);

if (response.StatusDescription.Equals("226 Transfer complete.\r\n"))

resultUpload[i] = true;

}

Console.WriteLine("\nClosing connection to {0}...", string.Format("ftp://{0}", networkPath));

response.Close();

((IDisposable)response).Dispose();

/* before I used this implementation to close and dispose the response */

// using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())

// {

// System.Threading.Thread.Sleep(500);

// Console.WriteLine("\nUpload of " + Path.GetFileName(filePath[i]) + " file complete.");

// Console.WriteLine("Request status: {0}", response.StatusDescription);

// if (response.StatusDescription.Equals("226 Transfer complete.\r\n"))

// resultUpload[i] = true;

// response.Close();

// }

// request = null;

//}

return resultUpload;

}

}

}