FTP的完整類<3><轉>

#region 重新命名檔案
        ///

        /// 更改一個檔案的名稱或一個目錄的名稱
        ///

        /// 原始檔案或目錄名稱
        /// 新的檔案或目錄的名稱
        public bool ReName(string RemoteFileName, string NewFileName)
        {
            try
            {
                if (!IsValidFileChars(RemoteFileName) || !IsValidFileChars(NewFileName))
                {
                    throw new Exception("檔名非法！");
                }
                if (RemoteFileName == NewFileName)
                {
                    return true;
                }
                if (FileExist(RemoteFileName))
                {
                    Request = OpenRequest(new Uri(this.Uri.ToString() + RemoteFileName), WebRequestMethods.Ftp.Rename);
                    Request.RenameTo = NewFileName;
                    Response = (FtpWebResponse)Request.GetResponse();

                }
                else
                {
                    throw new Exception("檔案在伺服器上不存在！");
                }
                return true;
            }
            catch (Exception ep)
            {
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        #endregion
        #region 複製、移動檔案
        ///

        /// 把當前目錄下面的一個檔案複製到伺服器上面另外的目錄中，注意，複製檔案之後，當前工作目錄還是檔案原來所在的目錄
        ///

        /// 當前目錄下的檔名
        /// 新目錄名稱。
        /// 說明：如果新目錄是當前目錄的子目錄，則直接指定子目錄。如: SubDirectory1/SubDirectory2 ；
        /// 如果新目錄不是當前目錄的子目錄，則必須從根目錄一級一級的指定。如： ./NewDirectory/SubDirectory1/SubDirectory2
        ///
        ///
        public bool CopyFileToAnotherDirectory(string RemoteFile, string DirectoryName)
        {
            string CurrentWorkDir = this.DirectoryPath;
            try
            {
                byte[] bt = DownloadFile(RemoteFile);
                GotoDirectory(DirectoryName);
                bool Success = UploadFile(bt, RemoteFile, false);
                this.DirectoryPath = CurrentWorkDir;
                return Success;
            }
            catch (Exception ep)
            {
                this.DirectoryPath = CurrentWorkDir;
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        ///

        /// 把當前目錄下面的一個檔案移動到伺服器上面另外的目錄中，注意，移動檔案之後，當前工作目錄還是檔案原來所在的目錄
        ///

        /// 當前目錄下的檔名
        /// 新目錄名稱。
        /// 說明：如果新目錄是當前目錄的子目錄，則直接指定子目錄。如: SubDirectory1/SubDirectory2 ；
        /// 如果新目錄不是當前目錄的子目錄，則必須從根目錄一級一級的指定。如： ./NewDirectory/SubDirectory1/SubDirectory2
        ///
        ///
        public bool MoveFileToAnotherDirectory(string RemoteFile, string DirectoryName)
        {
            string CurrentWorkDir = this.DirectoryPath;
            try
            {
                if (DirectoryName == "")
                    return false;
                if (!DirectoryName.StartsWith("/"))
                    DirectoryName = "/" + DirectoryName;
                if (!DirectoryName.EndsWith("/"))
                    DirectoryName += "/";
                bool Success = ReName(RemoteFile, DirectoryName + RemoteFile);
                this.DirectoryPath = CurrentWorkDir;
                return Success;
            }
            catch (Exception ep)
            {
                this.DirectoryPath = CurrentWorkDir;
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        #endregion
        #region 建立、刪除子目錄
        ///

        /// 在FTP伺服器上當前工作目錄建立一個子目錄
        ///

        /// 子目錄名稱
        public bool MakeDirectory(string DirectoryName)
        {
            try
            {
                if (!IsValidPathChars(DirectoryName))
                {
                    throw new Exception("目錄名非法！");
                }
                if (DirectoryExist(DirectoryName))
                {
                    throw new Exception("伺服器上面已經存在同名的檔名或目錄名！");
                }
                Response = Open(new Uri(this.Uri.ToString() + DirectoryName), WebRequestMethods.Ftp.MakeDirectory);
                return true;
            }
            catch (Exception ep)
            {
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        ///

        /// 從當前工作目錄中刪除一個子目錄
        ///

        /// 子目錄名稱
        public bool RemoveDirectory(string DirectoryName)
        {
            try
            {
                if (!IsValidPathChars(DirectoryName))
                {
                    throw new Exception("目錄名非法！");
                }
                if (!DirectoryExist(DirectoryName))
                {
                    throw new Exception("伺服器上面不存在指定的檔名或目錄名！");
                }
                Response = Open(new Uri(this.Uri.ToString() + DirectoryName), WebRequestMethods.Ftp.RemoveDirectory);
                return true;
            }
            catch (Exception ep)
            {
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        #endregion
        #region 檔案、目錄名稱有效性判斷
        ///

        /// 判斷目錄名中字元是否合法
        ///

        /// 目錄名稱
        public bool IsValidPathChars(string DirectoryName)
        {
            char[] invalidPathChars = Path.GetInvalidPathChars();
            char[] DirChar = DirectoryName.ToCharArray();
            foreach (char C in DirChar)
            {
                if (Array.BinarySearch(invalidPathChars, C) >= 0)
                {
                    return false;
                }
            }
            return true;
        }
        ///

        /// 判斷檔名中字元是否合法
        ///

        /// 檔名稱
        public bool IsValidFileChars(string FileName)
        {
            char[] invalidFileChars = Path.GetInvalidFileNameChars();
            char[] NameChar = FileName.ToCharArray();
            foreach (char C in NameChar)
            {
                if (Array.BinarySearch(invalidFileChars, C) >= 0)
                {
                    return false;
                }
            }
            return true;
        }
        #endregion
        #region 目錄切換操作
        ///

        /// 進入一個目錄
        ///

        ///
        /// 新目錄的名字。
        /// 說明：如果新目錄是當前目錄的子目錄，則直接指定子目錄。如: SubDirectory1/SubDirectory2 ；
        /// 如果新目錄不是當前目錄的子目錄，則必須從根目錄一級一級的指定。如： ./NewDirectory/SubDirectory1/SubDirectory2
        ///
        public bool GotoDirectory(string DirectoryName)
        {
            string CurrentWorkPath = this.DirectoryPath;
            try
            {
                DirectoryName = DirectoryName.Replace("\\", "/");
                string[] DirectoryNames = DirectoryName.Split(new char[] { '/' });
                if (DirectoryNames[0] == ".")
                {
                    this.DirectoryPath = "/";
                    if (DirectoryNames.Length == 1)
                    {
                        return true;
                    }
                    Array.Clear(DirectoryNames, 0, 1);
                }
                bool Success = false;
                foreach (string dir in DirectoryNames)
                {
                    if (dir != null)
                    {
                        Success = EnterOneSubDirectory(dir);
                        if (!Success)
                        {
                            this.DirectoryPath = CurrentWorkPath;
                            return false;
                        }
                    }
                }
                return Success;

            }
            catch (Exception ep)
            {
                this.DirectoryPath = CurrentWorkPath;
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        ///

        /// 從當前工作目錄進入一個子目錄
        ///

        /// 子目錄名稱
        private bool EnterOneSubDirectory(string DirectoryName)
        {
            try
            {
                if (DirectoryName.IndexOf("/") >= 0 || !IsValidPathChars(DirectoryName))
                {
                    throw new Exception("目錄名非法!");
                }
                if (DirectoryName.Length > 0 && DirectoryExist(DirectoryName))
                {
                    if (!DirectoryName.EndsWith("/"))
                    {
                        DirectoryName += "/";
                    }
                    _DirectoryPath += DirectoryName;
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception ep)
            {
                ErrorMsg = ep.ToString();
                throw ep;
            }
        }
        ///

        /// 從當前工作目錄往上一級目錄
        ///

        public bool ComeoutDirectory()
        {
            if (_DirectoryPath == "/")
            {
                ErrorMsg = "當前目錄已經是根目錄！";
                throw new Exception("當前目錄已經是根目錄！");
            }
            char[] sp = new char[1] { '/' };

            string[] strDir = _DirectoryPath.Split(sp, StringSplitOptions.RemoveEmptyEntries);
            if (strDir.Length == 1)
            {
                _DirectoryPath = "/";
            }
            else
            {
                _DirectoryPath = String.Join("/", strDir, 0, strDir.Length - 1);
            }
            return true;

        }
        #endregion
        #region 過載WebClient，支援FTP進度
        internal class MyWebClient : WebClient
        {
            protected override WebRequest GetWebRequest(Uri address)
            {
                FtpWebRequest req = (FtpWebRequest)base.GetWebRequest(address);
                req.UsePassive = false;
                return req;
            }
        }
        #endregion