ftp 獲取文件、上傳、下載

廢話不多說，直接上代碼

public class FtpHelper
    {
        private string _ip;
        private string _account;
        private string _pwd;

        public FtpHelper(string ip, string account, string pwd)
        {
            _ip = ip;
            _account = account;
            _pwd = pwd;
        }

        /// <summary>
        /// 獲取所有文件（含路徑）
        /// </summary>
        /// <param name="dir">目錄，可爲空</param>
        /// <returns>文件列表</returns>
        public List<string> GetFiles(string dir = "")
        {
            return GetAllFiles("ftp://" + _ip + "/" + dir, dir);
        }

        /// <summary>
        /// 獲取所有文件（含路徑）
        /// </summary>
        /// <param name="uri">地址：ftp://192.168.0.1/xx/yy/ </param>
        /// <param name="deep">子路徑，可爲空</param>
        /// <returns>文件列表</returns>
        private List<string> GetAllFiles(string uri, string deep)
        {
            try
            {
                FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                ftp.Credentials = new NetworkCredential(_account, _pwd);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());

                List<string> lstResult = new List<string>();
                string line = reader.ReadLine();
                while (line != null)
                {
                    var arr = line.Split(' ');
                    string value = arr[arr.Length - 1];
                    if (line.Contains("<DIR>"))
                    {
                        lstResult.AddRange(GetAllFiles(uri + "/" + value, value));
                    }
                    else
                    {
                        lstResult.Add((deep == "" ? "" : deep + "/") + value);
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return lstResult;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 獲取所有文件夾
        /// </summary>
        private List<string> GetAllDirectory(string uri, string deep)
        {
            try
            {
                FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                ftp.Credentials = new NetworkCredential(_account, _pwd);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());

                List<string> lstResult = new List<string>();
                string line = reader.ReadLine();
                while (line != null)
                {
                    var arr = line.Split(' ');
                    string value = arr[arr.Length - 1];
                    if (line.Contains("<DIR>"))
                    {
                        lstResult.Add((deep == "" ? "" : deep + "/") + value);
                        lstResult.AddRange(GetAllDirectory(uri + "/" + value, value));
                    }
                    line = reader.ReadLine();
                }
                reader.Close();
                response.Close();
                return lstResult;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 判斷文件夾是否存在
        /// </summary>
        /// <param name="dir">A/B/C</param>
        public void CreateFtpDirectory(string dir)
        {
            if (string.IsNullOrEmpty(dir) == true)
            {
                return;
            }

            try
            {
                bool hasDir = false;
                var lstDir = GetAllDirectory("ftp://" + _ip + "/", "");
                foreach (string path in lstDir)
                {
                    hasDir = path == (dir.EndsWith("/") ? dir.Substring(0, dir.Length - 1) : dir);
                    if (hasDir == true)
                    {
                        break;
                    }
                }
                if (hasDir == false)
                {
                    //判斷不存在，則創建
                    string uri = "ftp://" + _ip + "/" + (dir.EndsWith("/") ? dir : dir + "/");
                    FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    ftp.Credentials = new NetworkCredential(_account, _pwd);
                    ftp.Method = WebRequestMethods.Ftp.MakeDirectory;
                    FtpWebResponse response = (FtpWebResponse)ftp.GetResponse();
                    response.Close();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 文件上傳
        /// </summary>
        /// <param name="sourcePath">源文件路徑</param>
        /// <param name="savePath">保存路徑</param>
        public bool UploadFile(string sourcePath, string savePath)
        {
            try
            {
                CreateFtpDirectory(savePath);
                FileInfo info = new FileInfo(sourcePath);
                string uri = "ftp://" + _ip + "/" + (savePath.EndsWith("/") ? savePath : savePath + "/") + info.Name;
                FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                ftp.Credentials = new NetworkCredential(_account, _pwd);
                ftp.Method = WebRequestMethods.Ftp.UploadFile;

                using (Stream rs = ftp.GetRequestStream())
                using (FileStream fs = info.OpenRead())
                {
                    byte[] buffer = new byte[2048];
                    int count = fs.Read(buffer, 0, buffer.Length);
                    while (count > 0)
                    {
                        rs.Write(buffer, 0, count);
                        count = fs.Read(buffer, 0, buffer.Length);
                    }
                    fs.Close();
                    rs.Close();
                }
                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 下載文件
        /// </summary>
        /// <param name="lstPath">文件路徑</param>
        /// <param name="savePath">保存路徑</param>
        public void DownloadFiles(List<string> lstPath, string savePath)
        {
            try
            {
                foreach (string path in lstPath)
                {
                    string uri = "ftp://" + _ip + "/" + path;
                    FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    ftp.Credentials = new NetworkCredential(_account, _pwd);
                    ftp.Method = WebRequestMethods.Ftp.DownloadFile;

                    FtpWebResponse response = (FtpWebResponse)ftp.GetResponse();
                    Stream stream = response.GetResponseStream();

                    //沒目錄則創建
                    if (path.Contains("/") == true)
                    {
                        string dirPath = path.Substring(0, path.LastIndexOf("/") + 1);
                        if (Directory.Exists(savePath + dirPath) == false)
                        {
                            Directory.CreateDirectory(savePath + dirPath);
                        }
                    }

                    FileStream fs = new FileStream(savePath + path, FileMode.Create);
                    byte[] buffer = new byte[2048];
                    int readCount = stream.Read(buffer, 0, buffer.Length);
                    while (readCount > 0)
                    {
                        fs.Write(buffer, 0, readCount);
                        readCount = stream.Read(buffer, 0, buffer.Length);
                    }
                    stream.Close();
                    fs.Close();
                    response.Close();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

以下是調用的代碼

FtpHelper helper = new FtpHelper("192.168.0.1", "test", "test");
                var paths = helper.GetFiles();
                helper.DownloadFiles(paths, "D:\\FTPTest\\");
                helper.UploadFile("D:\\FTPTest\\x.txt", "T3");