C#实现FTP上传下载

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Data;
using System.Net;
using System.Globalization;

namespace FTPConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {

        }

        public static FtpStatusCode UploadFileInFTP(string filename)
        {
            Stream requestStream = null;
            FileStream fileStream = null;
            FtpWebResponse uploadResponse = null;
            FtpWebRequest uploadRequest = null;
            string serverIP;
            string userName;
            string password;
            string uploadurl;

            try
            {
                serverIP = System.Configuration.ConfigurationManager.AppSettings["FTPServerIP"];
                userName = System.Configuration.ConfigurationManager.AppSettings["UserName"];
                password = System.Configuration.ConfigurationManager.AppSettings["Password"];
                uploadurl = "ftp://" + serverIP + "/" + Path.GetFileName(filename);
                uploadRequest = (FtpWebRequest)WebRequest.Create(uploadurl);
                uploadRequest.Method = WebRequestMethods.Ftp.UploadFile;
                uploadRequest.Proxy = null;
                NetworkCredential nc = new NetworkCredential();
                nc.UserName = userName;
                nc.Password = password;
                uploadRequest.Credentials = nc;
                requestStream = uploadRequest.GetRequestStream();
                fileStream = File.Open(filename, FileMode.Open);

                byte[] buffer = new byte[1024];
                int bytesRead;

                while (true)
                {
                    bytesRead = fileStream.Read(buffer, 0, buffer.Length);
                    if (bytesRead == 0)
                    {
                        break;
                    }
                    requestStream.Write(buffer, 0, bytesRead);
                }

                requestStream.Close();
                uploadResponse = (FtpWebResponse)uploadRequest.GetResponse();
                return uploadResponse.StatusCode;
            }
            catch (Exception e)
            {
                SystemLog.logger(e.InnerException.Message);
            }
            finally
            {
                if (uploadResponse != null)
                {
                    uploadResponse.Close();
                }
                if (fileStream != null)
                {
                    fileStream.Close();
                }
                if (requestStream != null)
                {
                    requestStream.Close();
                }

            }
            return FtpStatusCode.Undefined;
        }


        public static int UploadFtp(string filename)
        {
            FtpWebRequest reqFTP = null;
            string serverIP;
            string userName;
            string password;
            string url;

            try
            {
                FileInfo fileInf = new FileInfo(filename);
                serverIP = System.Configuration.ConfigurationManager.AppSettings["FTPServerIP"];
                userName = System.Configuration.ConfigurationManager.AppSettings["UserName"];
                password = System.Configuration.ConfigurationManager.AppSettings["Password"];
                url = "ftp://" + serverIP + "/" + Path.GetFileName(filename);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
                reqFTP.Credentials = new NetworkCredential(userName, password);
                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.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

                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();
                return 0;
            }
            catch (Exception ex)
            {
                if (reqFTP != null)
                {
                    reqFTP.Abort();
                }
                SystemLog.logger(ex.InnerException.Message);
                return -2;
            }
        }


        public static int DownloadFtp(string filename)
        {
            FtpWebRequest reqFTP;
            string serverIP;
            string userName;
            string password;
            string url;

            try
            {
                serverIP = System.Configuration.ConfigurationManager.AppSettings["FTPServerIP"];
                userName = System.Configuration.ConfigurationManager.AppSettings["UserName"];
                password = System.Configuration.ConfigurationManager.AppSettings["Password"];
                url = "ftp://" + serverIP + "/" + Path.GetFileName(filename);

                FileStream outputStream = new FileStream(filename, FileMode.Create);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.KeepAlive = false;
                reqFTP.Credentials = new NetworkCredential(userName, password);
                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();
                return 0;
            }
            catch (Exception ex)
            {
                SystemLog.logger(ex.InnerException.Message);
                return -2;
            }
        }


        public class SystemLog
        {

            public static bool logger(string message)
            {
                try
                {
                    DateTime timeNow = DateTime.Now;
                    string filename = System.Configuration.ConfigurationManager.AppSettings["LogPath"];
                    string logSwitch = System.Configuration.ConfigurationManager.AppSettings["LogSwitch"];
                    if (logSwitch == "1")
                    {
                        Encoding encoding = Encoding.GetEncoding("gb2312");
                        byte[] info = encoding.GetBytes("[ " + timeNow.ToString("yyyy-MM-dd HH:mm:ss") + " ] " + message + "\n"); //转换编码成字节串

                        if (!filename.EndsWith(Path.DirectorySeparatorChar.ToString()))
                        {
                            filename = filename + Path.DirectorySeparatorChar.ToString();
                        }

                        using (FileStream fs = System.IO.File.Open(filename + timeNow.ToString("yyyy_MM_dd") + ".txt", FileMode.Append, FileAccess.Write, FileShare.ReadWrite))
                        {
                            fs.Write(info, 0, info.Length);
                            //以ASCII方式编写
                            using (StreamWriter w = new StreamWriter(fs, Encoding.ASCII))
                            {
                                w.Flush();
                                w.Close();
                            }

                            fs.Close();
                        }
                    }
                    return true;
                }
                catch (Exception e)
                {
                    return false;
                }
            }
        }

    }
}

开启Windows 7 下的FTP服务

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