向FTP服务器下载文件的简单实例

string filePath = "d:\\";

            string fileName = "lhking.txt"; //文件下载之后要保存的路径和文件名

            FtpWebRequest reqFTP;

            try

            {

                FileStream outputStream = new FileStream(filePath +"\\" + fileName, FileMode.Create);

                string filename = "ip.txt";

                string ftpServerIP = "222.76.217.24";

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" +ftpServerIP + "/" + filename));

                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

                reqFTP.UseBinary = true;

                reqFTP.Credentials = new NetworkCredential("l","l");

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                Stream ftpStream = response.GetResponseStream();

                long cl = response.ContentLength;

                int bufferSize = 2048;

                int readCount;

                byte[] buffer = new byte[bufferSize];

                readCount = ftpStream.Read(buffer, 0, bufferSize);

                while (readCount > 0)

                {

                    outputStream.Write(buffer, 0, readCount);

                    readCount = ftpStream.Read(buffer, 0, bufferSize);

                }

                ftpStream.Close();

                outputStream.Close();

                response.Close();

            }

            catch (Exception err) 

            { 

                MessageBox.Show(err.Message,"Download Error");

            }
向FTP服务器上传文件的简单实例

string filename = "ip.txt";

            string ftpServerIP = "222.76.217.24";

            FileInfo fileInf = new FileInfo(filename);

            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

            FtpWebRequest reqFTP;

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));

            reqFTP.Credentials = new NetworkCredential("l","l");

            reqFTP.KeepAlive = false;

            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

            reqFTP.UseBinary = true;

            reqFTP.ContentLength = fileInf.Length;

            int buffLength = 2048;

            byte[] buff = new byte[buffLength];

            int contentLen;

            FileStream fs = fileInf.OpenRead();

            try

            {

                Stream strm = reqFTP.GetRequestStream();

                contentLen = fs.Read(buff, 0, buffLength);

                while (contentLen != 0)

                {

                    strm.Write(buff, 0, contentLen);

                    contentLen = fs.Read(buff, 0, buffLength);

                }

                strm.Close();

                fs.Close();

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message, "Upload Error");

            }

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