I\'m uploading large files to ftp site using this code.
using (FileStream fs = new FileStream(FileLoc, FileMode.Open, FileAccess.Read))
Here's the code we use for uploading to FTP. It looks very similar to your own. Nevertheleess, I post it for your reference as we haven't had any such reported failures
private void UploadFile(string fileToUpload)
{
Output = new Uri(Path.Combine(Output.ToString(), Path.GetFileName(fileToUpload)));
FtpWebRequest request = WebRequest.Create(Output) as FtpWebRequest;
request.Method = WebRequestMethods.Ftp.UploadFile;
// in order to work with Microsoft Windows Server 2003 + IIS, we can't use passive mode.
request.UsePassive = false;
request.Credentials = new NetworkCredential(username, password);
// Copy the contents of the file to the request stream.
Stream dest = request.GetRequestStream();
FileStream src = File.OpenRead(fileToUpload);
int bufSize = (int)Math.Min(src.Length, 1024);
byte[] buffer = new byte[bufSize];
int bytesRead = 0;
int numBuffersUploaded = 0;
do
{
bytesRead = src.Read(buffer, 0, bufSize);
dest.Write(buffer, 0, bufSize);
numBuffersUploaded++;
}
while (bytesRead != 0);
dest.Close();
src.Close();
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
if (response.StatusCode != FtpStatusCode.ClosingData)
{
Console.Error.WriteLine("Request {0}: Error uploading file to FTP server: {1} ({2})", Id, response.StatusDescription, response.StatusCode);
}
else
{
Console.Out.WriteLine("Request {0}: Successfully transferred file to {1}", Id, Output.ToString());
}
}