请问关于这个FTP目录表的正则筛选是什么意思

[一品梅]

 /// <summary>
        /// Gets the files or directories from the specified directory.
        /// </summary>
        /// <param name="directory">The directory.</param>
        /// <param name="type">The type.</param>
        /// <returns>
        /// An enumeration of <see cref="FlagFtp.FtpFileSystemInfo"/> with the type of the specified type argument.
        /// </returns>
        private IEnumerable<FtpFileSystemInfo> GetFileSystemInfos(Uri directory, FtpFileSystemInfoType type)
        {
            if (directory == null)
                throw new ArgumentNullException("directory");

            if (directory.Scheme != Uri.UriSchemeFtp)
                throw new ArgumentException("The directory isn't a valid FTP URI", "directory");

            using (var response = (this.CreateResponse(directory, WebRequestMethods.Ftp.ListDirectoryDetails)))
            {
                using (Stream responseStream = response.GetResponseStream())
                {
                    using (var reader = new StreamReader(responseStream))
                    {
                        string all = reader.ReadToEnd();

                        //这个正则没大看懂。
                        var regex = new Regex(@"^(?<FileOrDirectory>[d-])(?<Attributes>[rwxts-]{3}){3}\s+\d{1,}\s+.*?(?<FileSize>\d{1,})\s+(?<Date>\w+\s+\d{1,2}\s+(?:\d{4})?)(?<YearOrTime>\d{1,2}:\d{2})?\s+(?<Name>.+?)\s?$",
                            RegexOptions.Compiled | RegexOptions.Multiline | RegexOptions.IgnoreCase | RegexOptions.IgnorePatternWhitespace);

                        MatchCollection matches = regex.Matches(all);

                        var infos = matches.Cast<Match>()
                            .Select(
                                match =>
                                new
                                {
                                    IsDirectory = match.Groups["FileOrDirectory"].Value == "d",

[一品梅]

对FTP的ListDirectoryDetails所产生的界面也不熟悉，望帮忙结合分析一下。

[xuzuning]

你把 all 打印出来就知道了 ^(?<FileOrDirectory>[d-])(?<Attributes>[rwxts-]{3}){3}\s+\d{1,}\s+.*?(?<FileSize>\d{1,})\s+(?<Date>\w+\s+\d{1,2}\s+(?:\d{4})?)(?<YearOrTime>\d{1,2}:\d{2})?\s+(?<Name>.+?)\s?$ FileOrDirectory、Attributes、FileSize、Date、YearOrTime、Name 望文生义，没有理解障碍