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);         }     } }

private void button1_Click(object sender, EventArgs e)//文件上传         {             FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl","123456");             ftpUpDown.Upload("E:\\other.rar");           }  private void button3_Click(object sender, EventArgs e)//修改         {             FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl", "123456");             ftpUpDown.Rename("张三", "李四");         }  private void button4_Click(object sender, EventArgs e)//删除         {             FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl", "123456");             ftpUpDown.delDir("张三");         }  private void button2_Click(object sender, EventArgs e)//添加         {             FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130:21", "wl", "123456");             ftpUpDown.MakeDir(this.TxT_name.Text);         }   //获得ftp文件的文件明晰，还为处理，能够获得所有的文件名称  FtpUpDown ftpUpDown = new FtpUpDown("192.168.2.130", "wl", "123456");             string[] str = ftpUpDown.GetFilesDetailList();             int i = 1;             foreach (string item in str)             {                 string[] name = item.Split(' ');                 TxT_name.Text += name[name.Length - 1] + ";";                 i++;             }             label1.Text = i.ToString();