C# FTP下载一目录下所有文件夹及文件

engins

　　　　
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net;using System.IO;namespace FtpDownload{class FtpDownloadUtil{private const string LogFileName = "FtpLog.txt";private string userName;private string password;public FtpDownloadUtil(){userName = "Anonymous";password = "";}public FtpDownloadUtil(string uName, string pwd){if (string.IsNullOrEmpty(uName) || string.IsNullOrEmpty(pwd)){userName = "Anonymous";password = "";}else{userName = uName;password = pwd;}}private void recordLog(string exM){File.AppendAllText(LogFileName, DateTime.Now.ToString() + "-------------------------------" + Environment.NewLine);File.AppendAllText(LogFileName, exM);}public FtpWebRequest CreateFtpConnect(string ftpAdd){try{FtpWebRequest ftpRequest = (FtpWebRequest)WebRequest.Create(new Uri(ftpAdd));ftpRequest.Credentials = new NetworkCredential(userName, password);ftpRequest.UseBinary = true;return ftpRequest;}catch (Exception ex){recordLog(ex.Message);return null;}}private string[] GetFtpFileList(string ftpAdd, string wRMetod){FtpWebRequest ftpRequest = CreateFtpConnect(ftpAdd);if (ftpRequest != null){StringBuilder fileListBuilder = new StringBuilder();ftpRequest.Method = wRMetod;try{WebResponse ftpResponse = ftpRequest.GetResponse();StreamReader ftpFileListReader = new StreamReader(ftpResponse.GetResponseStream(), Encoding.Default);string line = ftpFileListReader.ReadLine();while (line != null){fileListBuilder.Append(line);fileListBuilder.Append("/n");line = ftpFileListReader.ReadLine();}ftpFileListReader.Close();ftpResponse.Close();fileListBuilder.Remove(fileListBuilder.ToString().LastIndexOf('/n'), 1);return fileListBuilder.ToString().Split('/n');}catch (Exception ex){recordLog(ex.Message);return null;}}else{return null;}}/// <summary>/// 类似于 ftp://127.0.0.1//// 实现下载一个指定FTP目录下所有的文件和文件夹/// </summary>/// <param name="ftpAdd"></param>/// <param name="localDir"></param>/// <returns></returns>public bool DownloadDirectory(string ftpAddress, string dirName, string localDir){String[] fileList = null;string downloadDir = string.Empty;if (dirName != string.Empty){fileList = GetFileList(ftpAddress + dirName + "/", WebRequestMethods.Ftp.ListDirectoryDetails);downloadDir = localDir + "//" + dirName;if (!Directory.Exists(downloadDir)){Directory.CreateDirectory(downloadDir);}}else{return false;}List<string> directory = new List<string>();string[] temp = null;string[] files = GetFileList(ftpAddress + dirName + "/", WebRequestMethods.Ftp.ListDirectory);if (fileList != null){foreach (string file in fileList){if (file.Contains("<DIR>")) //if this is a dir need recursion download{temp = file.Trim().Split(new string[] { "<DIR>" }, StringSplitOptions.None);directory.Add(temp[1].Trim());temp = null;}}}else {return false;}if (directory.Count > 0 && directory.Count < fileList.Length){foreach (string fi in files){if (!directory.Contains(fi.Trim())){this.DownloadFile(ftpAddress + dirName + "/" + fi.Trim(), fi.Trim(), downloadDir);}}}else if (directory.Count == 0 && fileList.Length > 0){foreach (string fi in files){this.DownloadFile(ftpAddress + dirName + "/" + fi.Trim(), fi.Trim(), downloadDir);}}if (directory.Count > 0){foreach (string dir in directory){DownloadDirectory(ftpAddress + dirName + "/", dir, downloadDir);}}return true;}public bool DownloadFileFromFtp(string FtpAdd, string fileName,string localDir){return true;}}}
　　主要实现了FTP目录下所有文件夹及文件的下载，有些函数没写完，后续补充完整！

　　
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