sftp是ftp协议的升级版本，是牺牲上传速度为代价，换取安全性能，本人开始尝试使用Tamir.SharpSSH.dll但它对新版本的openssh 不支持，所有采用Ssh.Net方式 需要依赖：Renci.SshNet.dll 下载链接

/// <summary> /// SFTP操作类 /// </summary> public class SFTPHelper { #region 字段或属性 private SftpClient sftp; /// <summary> /// SFTP连接状态 /// </summary> public bool Connected { get { return sftp.IsConnected; } } #endregion #region 构造 /// <summary> /// 构造 /// </summary> /// <param name="ip">IP</param> /// <param name="port">端口</param> /// <param name="user">用户名</param> /// <param name="pwd">密码</param> public SFTPHelper(string ip, string port, string user, string pwd) { sftp = new SftpClient(ip, Int32.Parse(port), user, pwd); } #endregion #region 连接SFTP /// <summary> /// 连接SFTP /// </summary> /// <returns>true成功</returns> public bool Connect() { try { if (!Connected) { sftp.Connect(); } return true; } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("连接SFTP失败，原因：{0}", ex.Message)); throw new Exception(string.Format("连接SFTP失败，原因：{0}", ex.Message)); } } #endregion #region 断开SFTP /// <summary> /// 断开SFTP /// </summary> public void Disconnect() { try { if (sftp != null && Connected) { sftp.Disconnect(); } } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("断开SFTP失败，原因：{0}", ex.Message)); throw new Exception(string.Format("断开SFTP失败，原因：{0}", ex.Message)); } } #endregion #region SFTP上传文件 /// <summary> /// SFTP上传文件 /// </summary> /// <param name="localPath">本地路径</param> /// <param name="remotePath">远程路径</param> public void Put(string localPath, string remotePath) { try { using (var file = File.OpenRead(localPath)) { Connect(); sftp.UploadFile(file, remotePath); Disconnect(); } } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件上传失败，原因：{0}", ex.Message)); throw new Exception(string.Format("SFTP文件上传失败，原因：{0}", ex.Message)); } } #endregion #region SFTP获取文件 /// <summary> /// SFTP获取文件 /// </summary> /// <param name="remotePath">远程路径</param> /// <param name="localPath">本地路径</param> public void Get(string remotePath, string localPath) { try { Connect(); var byt = sftp.ReadAllBytes(remotePath); Disconnect(); File.WriteAllBytes(localPath, byt); } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件获取失败，原因：{0}", ex.Message)); throw new Exception(string.Format("SFTP文件获取失败，原因：{0}", ex.Message)); } } #endregion #region 删除SFTP文件 /// <summary> /// 删除SFTP文件 /// </summary> /// <param name="remoteFile">远程路径</param> public void Delete(string remoteFile) { try { Connect(); sftp.Delete(remoteFile); Disconnect(); } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件删除失败，原因：{0}", ex.Message)); throw new Exception(string.Format("SFTP文件删除失败，原因：{0}", ex.Message)); } } #endregion #region 获取SFTP文件列表 /// <summary> /// 获取SFTP文件列表 /// </summary> /// <param name="remotePath">远程目录</param> /// <param name="fileSuffix">文件后缀</param> /// <returns></returns> public ArrayList GetFileList(string remotePath, string fileSuffix) { try { Connect(); var files = sftp.ListDirectory(remotePath); Disconnect(); var objList = new ArrayList(); foreach (var file in files) { string name = file.Name; if (name.Length > (fileSuffix.Length + 1) && fileSuffix == name.Substring(name.Length - fileSuffix.Length)) { objList.Add(name); } } return objList; } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件列表获取失败，原因：{0}", ex.Message)); throw new Exception(string.Format("SFTP文件列表获取失败，原因：{0}", ex.Message)); } } #endregion #region 移动SFTP文件 /// <summary> /// 移动SFTP文件 /// </summary> /// <param name="oldRemotePath">旧远程路径</param> /// <param name="newRemotePath">新远程路径</param> public void Move(string oldRemotePath, string newRemotePath) { try { Connect(); sftp.RenameFile(oldRemotePath, newRemotePath); Disconnect(); } catch (Exception ex) { // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件移动失败，原因：{0}", ex.Message)); throw new Exception(string.Format("SFTP文件移动失败，原因：{0}", ex.Message)); } } #endregion }

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