C#中怎么实现ftp检测目录是否存在和创建文件夹

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C# ftp判断目录是否存在，不存在则自动创建文件夹

        /// <summary>        /// 判断文件的目录是否存,不存则创建        /// </summary>        /// <param name="destFilePath">本地文件目录</param>        public void CheckDirectoryAndMakeMyWilson3(string destFilePath)        {            string fullDir = destFilePath.IndexOf(':') > 0 ? destFilePath.Substring(destFilePath.IndexOf(':') + 1) : destFilePath;            fullDir = fullDir.Replace('\\', '/');            string[] dirs = fullDir.Split('/');//解析出路径上所有的文件名            string curDir = "/";            for (int i = 0; i < dirs.Length; i++)//循环查询每一个文件夹            {                if (dirs[i] == "") continue;                string dir = dirs[i];                //如果是以/开始的路径,第一个为空                 if (dir != null && dir.Length > 0)                {                    try                    {                        CheckDirectoryAndMakeMyWilson2(curDir, dir);                        curDir += dir + "/";                    }                    catch (Exception)                    { }                }            }        }

        public void CheckDirectoryAndMakeMyWilson2(string rootDir, string remoteDirName)        {            if (!DirectoryExist(rootDir, remoteDirName))//判断当前目录下子目录是否存在                MakeDir(rootDir + "\\" + remoteDirName);        }        public bool DirectoryExist(string rootDir, string RemoteDirectoryName)        {            string[] dirList = GetDirectoryList(rootDir);//获取子目录            if (dirList.Length > 0)            {                foreach (string str in dirList)                {                    if (str.Trim() == RemoteDirectoryName.Trim())                    {                        return true;                    }                }            }            return false;        }

         public string[] GetDirectoryList(string dirName)        {            string[] drectory = GetFilesDetailList(dirName);            List<string> strList = new List<string>();            if (drectory.Length > 0)            {                foreach (string str in drectory)                {                    if (str.Trim().Length == 0)                        continue;                    //会有两种格式的详细信息返回                    //一种包含<DIR>                    //一种第一个字符串是drwxerwxx这样的权限操作符号                    //现在写代码包容两种格式的字符串                    if (str.Trim().Contains("<DIR>"))                    {                        strList.Add(str.Substring(39).Trim());                    }                    else                    {                        if (str.Trim().Substring(0, 1).ToUpper() == "D")                        {                            strList.Add(str.Substring(55).Trim());                        }                    }                }            }            return strList.ToArray();        }

定义ftp地址：private string ftpServerIP = "IP:端口";

         /// <summary>        /// 获得文件明晰        /// </summary>        /// <param name="path"></param>        /// <returns></returns>        public string[] GetFilesDetailList(string path)        {            return GetFileList("ftp://" + ftpServerIP + "/" + path, WEBRequestMethods.Ftp.ListDirectoryDetails);        }        //都调用这个        //上面的代码示例了如何从ftp服务器上获得文件列表        private string[] GetFileList(string path, string WRMethods)        {            StringBuilder result = new StringBuilder();            try            {                Connect(path);//建立FTP连接                reqFTP.Method = WRMethods;                reqFTP.KeepAlive = false;                WebResponse response = reqFTP.GetResponse();                StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名                string line = reader.ReadLine();                 while (line != null)                {                    result.Append(line);                    result.Append("\n");                    line = reader.ReadLine();                }                 // to remove the trailing '' ''                 if (result.ToString() != "")                {                    result.Remove(result.ToString().LastIndexOf("\n"), 1);                }                reader.Close();                response.Close();                return result.ToString().Split('\n');            }             catch (Exception ex)            {                throw new Exception("获取文件列表失败。原因： " + ex.Message);            }        }

        //连接ftp        private void Connect(String path)        {            // 根据uri创建FtpWebRequest对象            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));            // 指定数据传输类型            reqFTP.Method = System.net.WebRequestMethods.Ftp.UploadFile;            reqFTP.UseBinary = true;            reqFTP.UsePassive = false;//表示连接类型为主动模式            // ftp用户名和密码            reqFTP.Credentials = new NetworkCredential(FTPUSERID, FTPPASSWord);        }

         /// <summary>        /// 创建目录        /// </summary>        /// <param name="dirName"></param>        public void MakeDir(string dirName)        {            try            {                string uri = "ftp://" + ftpServerIP + "/" + dirName;                Connect(uri);//连接                       reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;                reqFTP.KeepAlive = false;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                response.Close();            }            catch (Exception ex)            {                throw new Exception("创建文件失败，原因: " + ex.Message);            }        }

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