C# winfrom 模拟ftp文件管理实现代码

using System; using System.Collections.Generic; using System.Text; using System.Net; using System.IO; using System.Windows.Forms; namespace ConvertData{    class FtpUpDown    {        string ftpServerIP;        string ftpUserID;        string ftpPassword;        FtpWebRequest reqFTP;        private void Connect(String path)//连接ftp        {            // 根据uri创建FtpWebRequest对象            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));            // 指定数据传输类型            reqFTP.UseBinary = true;            // ftp用户名和密码            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);        }        public FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)        {            this.ftpServerIP = ftpServerIP;            this.ftpUserID = ftpUserID;            this.ftpPassword = ftpPassword;        }        //都调用这个        private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表        {            string[] downloadFiles;            StringBuilder result = new StringBuilder();            try            {                Connect(path);                reqFTP.Method = WRMethods;                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 '\n'                 result.Remove(result.ToString().LastIndexOf('\n'), 1);                reader.Close();                response.Close();                return result.ToString().Split('\n');            }            catch (Exception ex)            {                System.Windows.Forms.MessageBox.Show(ex.Message);                downloadFiles = null;                return downloadFiles;            }        }        public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表        {            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);        }         public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表        {            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);        }        public void Upload(string filename) //上面的代码实现了从ftp服务器上载文件的功能        {            FileInfo fileInf = new FileInfo(filename);            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;            Connect(uri);//连接                   // 默认为true，连接不会被关闭             // 在一个命令之后被执行             reqFTP.KeepAlive = false;            // 指定执行什么命令             reqFTP.Method = WebRequestMethods.Ftp.UploadFile;            // 上传文件时通知服务器文件的大小             reqFTP.ContentLength = fileInf.Length;            // 缓冲大小设置为kb              int buffLength = 2048;            byte[] buff = new byte[buffLength];            int contentLen;            // 打开一个文件流(System.IO.FileStream) 去读上传的文件             FileStream fs = fileInf.OpenRead();            try            {                // 把上传的文件写入流                 Stream strm = reqFTP.GetRequestStream();                // 每次读文件流的kb                  contentLen = fs.Read(buff, 0, buffLength);                // 流内容没有结束                 while (contentLen != 0)                {                    // 把内容从file stream 写入upload stream                      strm.Write(buff, 0, contentLen);                    contentLen = fs.Read(buff, 0, buffLength);                }                // 关闭两个流                 strm.Close();                fs.Close();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message, "Upload Error");            }        }        public bool Download(string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能        {            try            {                String onlyFileName = Path.GetFileName(fileName);                string newFileName = filePath + "\\" + onlyFileName;                if (File.Exists(newFileName))                {                    errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);                    return false;                }                string url = "ftp://" + ftpServerIP + "/" + fileName;                Connect(url);//连接                   reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                Stream ftpStream = response.GetResponseStream();                long cl = response.ContentLength;                int bufferSize = 2048;                int readCount;                byte[] buffer = new byte[bufferSize];                readCount = ftpStream.Read(buffer, 0, bufferSize);                FileStream outputStream = new FileStream(newFileName, FileMode.Create);                while (readCount > 0)                {                    outputStream.Write(buffer, 0, readCount);                    readCount = ftpStream.Read(buffer, 0, bufferSize);                }                ftpStream.Close();                outputStream.Close();                response.Close();                errorinfo = "";                return true;            }            catch (Exception ex)            {                errorinfo = string.Format("因{0},无法下载", ex.Message);                return false;            }        }        //删除文件         public void DeleteFileName(string fileName)         {             try             {                 FileInfo fileInf = new FileInfo(fileName);                 string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;                 Connect(uri);//连接                          // 默认为true，连接不会被关闭                 // 在一个命令之后被执行                 reqFTP.KeepAlive = false;                 // 指定执行什么命令                 reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;                 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                 response.Close();             }             catch (Exception ex)             {                 MessageBox.Show(ex.Message, "删除错误");             }         }        //创建目录        public void MakeDir(string dirName)        {            try            {                string uri = "ftp://" + ftpServerIP + "/" + dirName;                Connect(uri);//连接                        reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                response.Close();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }         //删除目录         public void delDir(string dirName)        {            try            {                string uri = "ftp://" + ftpServerIP + "/" + dirName;                Connect(uri);//连接                        reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                response.Close();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        //获得文件大小        public long GetFileSize(string filename)        {            long fileSize = 0;            try            {                FileInfo fileInf = new FileInfo(filename);                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;                Connect(uri);//连接                        reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                fileSize = response.ContentLength;                response.Close();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            return fileSize;        }        //文件改名         public void Rename(string currentFilename, string newFilename)        {            try            {                FileInfo fileInf = new FileInfo(currentFilename);                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;                Connect(uri);//连接                 reqFTP.Method = WebRequestMethods.Ftp.Rename;                reqFTP.RenameTo = newFilename;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                //Stream ftpStream = response.GetResponseStream();                //ftpStream.Close();                 response.Close();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        //获得文件明晰         public string[] GetFilesDetailList()        {            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);        }         //获得文件明晰         public string[] GetFilesDetailList(string path)         {             return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);         }    }}