C# 使用Renci.SshNet连接SSH远程服务器

当我们需要在远程的服务器上上传下载文件等一系列操作时，通常会借助一些远程工具才能完成。Renci.SshNet是一个用于.NET的安全Shell（SSH-2）库，可以在不借助第三方工具的情况下连接远程服务器进行操作。

GitHub：https://github.com/sshnet/SSH.NET

引用Renci.SshNet

　　执行远程命令

using (SshClient sshClient = new SshClient(host, int.Parse(port, CultureInfo.CurrentCulture), username, password))
{
    //连接
    sshClient.Connect();
    //执行命令
    var cmd = sshClient.RunCommand("ls");
    //ExitStatus == 0 执行成功
    //
    if (cmd.ExitStatus == 0)
    {
        Console.WriteLine(cmd.Result);//执行结果
    }
    else
    {
        Console.WriteLine(cmd.Error);//错误信息
    }
    //断开连接
    sshClient.Disconnect();
}

　　封装的相关的Helper

public class SshNetHelper : IDisposable
{
    #region Field or property

        private readonly SftpClient sftp;

        /// <summary>
        /// SFTP connect status
        /// </summary>
        public bool Connected => sftp.IsConnected;

        #endregion

    #region Constructor

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="ip">IP</param>
        /// <param name="port">Port</param>
        /// <param name="user">Username</param>
        /// <param name="pwd">password</param>
        public SshNetHelper(string ip, string port, string user, string pwd)
        {
            sftp = new SftpClient(ip, int.Parse(port, CultureInfo.CurrentCulture), user, pwd);
        }

        #endregion

    #region Connect SFTP

        /// <summary>
        /// Connect SFTP
        /// </summary>
        /// <returns>true</returns>
        public bool Connect()
        {
            try
            {
                if (!Connected)
                {
                    sftp.Connect();
                }
                return true;
            }
            catch (Exception ex)
            {
                throw new Exception($"Disconnect SFTP fail，Error Message：{ex.Message}");
            }
        }

        #endregion

    #region Disconnect SFTP

        /// <summary>
        /// Disconnect SFTP
        /// </summary>
        public void Disconnect()
        {
            try
            {
                if (sftp != null && Connected)
                {
                    sftp.Disconnect();
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"Disconnect SFTP fail，Error Message：{ex.Message}");
            }
        }

        #endregion

    #region SFTP Upload File

        /// <summary>
        /// SFTP Upload File
        /// </summary>
        /// <param name="localPath">Local file path</param>
        /// <param name="remotePath">Remote file path</param>
        public void Put(string localPath, string remotePath)
        {
            try
            {
                using (var file = File.OpenRead(localPath))
                {
                    Connect();
                    sftp.UploadFile(file, remotePath);
                    Disconnect();
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"SFTP Upload File fail，Error Message：{ex.Message}");
            }
        }

        #endregion

    #region SFTP Batch Upload File

        /// <summary>
        /// SFTP Batch Upload File
        /// </summary>
        /// <param name="localPath">Local file path(without file name)</param>
        /// <param name="remotePath">Remote file path(without file name)</param>
        public void BatchPut(string localPath, string remotePath)
        {
            string uploadFullName = "";
            string remoteFullName = "";
            try
            {
                Connect();
                DirectoryInfo fdir = new DirectoryInfo(localPath);
                FileInfo[] file = fdir.GetFiles();

                if (file.Length != 0)
                {
                    foreach (FileInfo f in file) //show all files under the path
                    {
                        using (var upLoadFile = File.OpenRead(f.FullName))
                        {
                            uploadFullName = f.FullName;
                            remoteFullName = remotePath + "/" + f.Name;

                            sftp.UploadFile(upLoadFile, remotePath + "/" + f.Name);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"SFTP Batch Upload File Fail，Error Message：{ex.Message}");
            }
        }

        #endregion SFTP Batch Upload File

    #region SFTP Get File

        /// <summary>
        /// SFTP Get File
        /// </summary>
        /// <param name="remotePath">Remote file path</param>
        /// <param name="localPath">Local file path</param>
        public void Get(string remotePath, string localPath)
        {
            try
            {
                Connect();
                var byt = sftp.ReadAllBytes(remotePath);
                Disconnect();
                File.WriteAllBytes(localPath, byt);
            }
            catch (Exception ex)
            {
                throw new Exception($"SFTP Get File Fail，Error Message：{ ex.Message }");
            }
        }

        #endregion

    #region Delete SFTP File

        /// <summary>
        /// Delete SFTP File
        /// </summary>
        /// <param name="remoteFile">Remote File path</param>
        public void Delete(string remoteFile)
        {
            try
            {
                Connect();
                sftp.Delete(remoteFile);
                Disconnect();
            }
            catch (Exception ex)
            {
                throw new Exception($"Remote File Path Fail，Error Message：{ ex.Message }");
            }
        }

        #endregion

    #region Get SFTP File List

        /// <summary>
        /// Get SFTP File List
        /// </summary>
        /// <param name="remotePath">Local path</param>
        /// <param name="fileSuffix">file suffix</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)
            {
                throw new Exception($"Get SFTP File List Fail，Error Message：{ex.Message}");
            }
        }

        #endregion

    #region Move SFTP File

        /// <summary>
        /// Move SFTP File
        /// </summary>
        /// <param name="oldRemotePath">Old Remote Path</param>
        /// <param name="newRemotePath">New Remote Path</param>
        public void Move(string oldRemotePath, string newRemotePath)
        {
            try
            {
                Connect();
                sftp.RenameFile(oldRemotePath, newRemotePath);
                Disconnect();
            }
            catch (Exception ex)
            {
                throw new Exception($"Move SFTP File Faile，Error Message：{ex.Message}");
            }
        }

        #endregion

    protected virtual void Dispose(bool disposing)
        {
            if (!disposing) return;
            // dispose managed resources
            sftp.Dispose();
            // free native resources
        }

    public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
}