代码：
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Net;internal class FTPManager : Singleton<FTPManager>
{/// <summary>/// FTP 地址/// </summary>public string FtpUrl { get; set; }/// <summary>/// FTP 用户名/// </summary>public string FtpUser { get; set; }/// <summary>/// FTP 密码/// </summary>public string FtpPassword { get; set; }/// <summary>/// FTP 文件夹列表/// </summary>public List<string> FtpDirectoryList { get; private set; } = new List<string>();/// <summary>/// FTP 文件列表/// </summary>public List<FileInfo1> FtpFileList { get; private set; } = new List<FileInfo1>();/// <summary>/// 文件夹列表（临时）/// </summary>private Queue<string> DirectoryListTemporary { get; set; } = new Queue<string>();/// <summary>/// 读取文件/// </summary>public void Read(){if (string.IsNullOrEmpty(FtpUrl)){Console.WriteLine("请先读取配置文件");return;}Console.WriteLine("[GetAllFileList]开始读取 FTP 文件");FtpFileList.Clear();FtpDirectoryList.Clear();DirectoryListTemporary.Clear();GetFtpDirectoryList(FtpUrl);Console.WriteLine("[GetAllFileList]读取 FTP 文件完成");}/// <summary>/// 获取所有文件，文件夹，文件大小，修改时间，哈希值/// </summary>/// <param name="remoteFolderPath"></param>public void GetFtpDirectoryList(string url){try{FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;request.Credentials = new NetworkCredential(FtpUser, FtpPassword);request.KeepAlive = true;using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())using (StreamReader reader = new StreamReader(response.GetResponseStream())){while (!reader.EndOfStream){string line = reader.ReadLine();if (line == null) continue;string[] parts = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);//注意：FTP 获取的时间中并没有秒数部分//适用与 Microsoft IIS FTP 服务器，返回格式如下//文件 "06-10-23 02:57PM 222720 CNCMain.exe"//文件夹 "06-14-23 09:17AM <DIR> bin"if (parts.Length == 4){//文件夹if (parts[2].Contains("<DIR>")){string directoryName = line.Substring(line.LastIndexOf("<DIR>") + 5).Trim();string path = $"{url}{directoryName}//";FtpDirectoryList.Add(path);DirectoryListTemporary.Enqueue(path);}//文件else{string path = $"{url}{parts[3]}";Console.WriteLine("正在读取：{0}", path);long size = 0;long.TryParse(parts[2], out size);DateTime lastModified = DateTime.MinValue;string dateString = string.Join(" ", parts[5], parts[6], parts[7]);DateTime.TryParse(dateString, out lastModified);var ftpFile = new FileInfo1();ftpFile.Size = size;ftpFile.FileName = parts[3];ftpFile.FilePath = path;ftpFile.LastWriteTime = lastModified;FtpFileList.Add(ftpFile);}}//适用于 UNIX/Linux FTP 服务器，格式如下//文件 -rw-r--r-- 1 ftp ftp 17172 Apr 29 16:12 lang.txt//文件夹 drwxr-xr-x 1 ftp ftp 0 Jun 17 10:46 Test1 else if (parts.Length == 9){string permission = parts[0];//文件夹if (permission.StartsWith("d")){string directoryName = parts[8];string path = $"{url}{directoryName}//";FtpDirectoryList.Add(path);DirectoryListTemporary.Enqueue(path);}//文件else if (permission.StartsWith("-")){string path = $"{url}{parts[8]}";Console.WriteLine("正在读取：{0}", path);long size = 0;long.TryParse(parts[4], out size);string datePart = string.Join(" ", parts[5], parts[6], parts[7]);DateTime lastWriteTime = DateTime.MinValue;if (parts[7].Contains(":")){//日期格式：Jun 17 10:46 lastWriteTime = DateTime.ParseExact(datePart, "MMM dd HH:mm", CultureInfo.InvariantCulture);}else{//如果是去年的文件，则为：Nov 16 2023lastWriteTime = DateTime.ParseExact(datePart, "MMM dd yyyy", CultureInfo.InvariantCulture);}var ftpFile = new FileInfo1();ftpFile.Size = size;ftpFile.FileName = parts[8];ftpFile.FilePath = path;ftpFile.LastWriteTime = lastWriteTime;FtpFileList.Add(ftpFile);}}}}if (DirectoryListTemporary.Count > 0)GetFtpDirectoryList(DirectoryListTemporary.Dequeue());}catch (Exception ex){Console.WriteLine("读取 FTP 文件列表错误：{0}", ex.Message);}}
}end