使用FTP上传文件到服务器

 public class FTPClass
    {
        /// <summary>
        /// FTP
        /// </summary>
        /// <param name="Server">服务</param>
        /// <param name="Port">端口</param>
        /// <param name="UserName">用户</param>
        /// <param name="Password">密码</param>
        /// <param name="SubDir">子目录</param>
        /// <param name="SourceFile">文件路径</param>
        /// <param name="TargetName">目标名称</param>
        /// <returns></returns>
        public static bool Upload(string Server, string Port, string UserName, string Password, string SubDir, string SourceFile, string TargetName)
        {
            FileInfo fileInf = new FileInfo(SourceFile);
            string FileUri = "ftp://" + Server + (Port.Length > 0 ? ":" + Port : "") + "/" + TargetName;

            if (TargetName.IndexOf("\\") >= 0)
            {
                MkDir(Server, Port, UserName, Password, SubDir, TargetName.Substring(0, TargetName.IndexOf("\\")));
            }


            FtpWebRequest reqFTP;

            // 根据uri创建FtpWebRequest对象
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FileUri));

            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential(UserName, Password);

            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;

            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

            // 指定数据传输类型
            reqFTP.UseBinary = true;
            reqFTP.UsePassive = false;

            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;

            // 缓冲大小设置为2kb
            int buffLength = 2048;

            byte[] buff = new byte[buffLength];
            int contentLen;

            // 打开一个文件流 (System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();
            //try
            //{
            // 把上传的文件写入流
            Stream strm = reqFTP.GetRequestStream();

            // 每次读文件流的2kb
            contentLen = fs.Read(buff, 0, buffLength);

            // 流内容没有结束
            while (contentLen != 0)
            {
                // 把内容从file stream 写入 upload stream
                strm.Write(buff, 0, contentLen);

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

            // 关闭两个流
            strm.Close();
            fs.Close();
            //}
            //catch (Exception ex)
            //{
            //    MessageBox.Show(ex.Message, "上传文件错误！");
            //    return false;
            //}
            return true;
        }

        public static bool Download(string Server, string Port, string UserName, string Password, string SubDir, string SourceFile, string TargetName)
        {
            FtpWebRequest reqFTP;

            try
            {
                string FileUri = "ftp://" + Server + (Port.Length > 0 ? ":" + Port : "") + "/" + TargetName;

                FileStream outputStream = new FileStream(TargetName, FileMode.Create);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FileUri));

                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

                reqFTP.UseBinary = true;
                reqFTP.UsePassive = false;
                reqFTP.KeepAlive = false;
                reqFTP.Timeout = 1000;

                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 true;
            }
            catch (Exception ex)
            {
                //IM.DealBaseData.ADLog.DealADLog.WriteLog(ResourcesManager.StringResourcesManagers.GetString("Message_ErrorMessage"), ex.ToString());
                //IM.CommonWinAD.MessageShow.Show(ResourcesManager.StringResourcesManagers.GetString("Form_DownLoadError") + ex.ToString());
                return false;
            }
        }

        public static bool Delete(string Server, string Port, string UserName, string Password, string SubDir, string TargetName)
        {
            FtpWebRequest reqFTP;

            try
            {
                string FileUri = "ftp://" + Server + (Port.Length > 0 ? ":" + Port : "") + "/" + TargetName;

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FileUri));

                reqFTP.KeepAlive = false;

                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

                reqFTP.UseBinary = true;

                reqFTP.Credentials = new NetworkCredential(UserName, Password);


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

                response.Close();

                return true;
            }
            catch (Exception ex)
            {
                //IM.DealBaseData.ADLog.DealADLog.WriteLog(ResourcesManager.StringResourcesManagers.GetString("Message_ErrorMessage"), ex.ToString());
                //IM.CommonWinAD.MessageShow.Show(ResourcesManager.StringResourcesManagers.GetString("Form_AudioFileDelError"));
                return false;
            }
        }

        public static bool MkDir(string Server, string Port, string UserName, string Password, string SubDir, string DirStr)
        {
            FtpWebRequest reqFTP;

            try
            {
                string FileUri = "ftp://" + Server + (Port.Length > 0 ? ":" + Port : "");


                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FileUri + "/" + DirStr));

                reqFTP.KeepAlive = false;

                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

                reqFTP.UseBinary = true;

                reqFTP.Credentials = new NetworkCredential(UserName, Password);


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

                response.Close();

                return true;
            }
            catch
            {
                return false;
            }
        }

        public static bool DelDir(string Server, string Port, string UserName, string Password, string SubDir, string DirStr)
        {
            FtpWebRequest reqFTP;

            try
            {
                string FileUri = "ftp://" + Server + (Port.Length > 0 ? ":" + Port : "");


                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FileUri + "/" + DirStr));

                reqFTP.KeepAlive = false;

                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

                reqFTP.UseBinary = true;

                reqFTP.Credentials = new NetworkCredential(UserName, Password);


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

                response.Close();

                return true;
            }
            catch
            {
                return false;
            }
        }

    }