SFTP 同期

using Renci.SshNet;
using System;
using System.Collections.Generic;
using System.IO;

public class SftpManager : IDisposable
{
    private SftpClient sftpClient;

    public SftpManager(string host, int port, string username, string privateKeyFilePath, string passphrase = null)
    {
        var privateKeyFile = new PrivateKeyFile(privateKeyFilePath, passphrase);
        var keyFiles = new[] { privateKeyFile };

        var connectionInfo = new ConnectionInfo(host, port, username, keyFiles);

        sftpClient = new SftpClient(connectionInfo);
    }

    public void Connect()
    {
        if (!sftpClient.IsConnected)
            sftpClient.Connect();
    }

    public void Disconnect()
    {
        if (sftpClient.IsConnected)
            sftpClient.Disconnect();
    }

    public void UploadFile(string localFilePath, string remoteFilePath)
    {
        try
        {
            using (var fileStream = new FileStream(localFilePath, FileMode.Open))
            {
                sftpClient.UploadFile(fileStream, remoteFilePath);
            }
        }
        catch (Exception ex)
        {
            HandleSftpException(ex);
        }
    }

    public void DownloadFile(string remoteFilePath, string localFilePath)
    {
        try
        {
            using (var fileStream = File.OpenWrite(localFilePath))
            {
                sftpClient.DownloadFile(remoteFilePath, fileStream);
            }
        }
        catch (Exception ex)
        {
            HandleSftpException(ex);
        }
    }

    public void DeleteFile(string remoteFilePath)
    {
        try
        {
            sftpClient.DeleteFile(remoteFilePath);
        }
        catch (Exception ex)
        {
            HandleSftpException(ex);
        }
    }

    public void CreateDirectory(string remoteDirectoryPath)
    {
        try
        {
            sftpClient.CreateDirectory(remoteDirectoryPath);
        }
        catch (Exception ex)
        {
            HandleSftpException(ex);
        }
    }

    public void DeleteDirectory(string remoteDirectoryPath)
    {
        try
        {
            sftpClient.DeleteDirectory(remoteDirectoryPath);
        }
        catch (Exception ex)
        {
            HandleSftpException(ex);
        }
    }

    public IEnumerable<SftpFile> ListDirectory(string remoteDirectoryPath)
    {
        try
        {
            return sftpClient.ListDirectory(remoteDirectoryPath);
        }
        catch (Exception ex)
        {
            HandleSftpException(ex);
            return null;
        }
    }

    public bool IsConnected()
    {
        return sftpClient.IsConnected;
    }

    private void HandleSftpException(Exception ex)
    {
        Console.WriteLine($"SFTP Error: {ex.Message}");
    }

    public void Dispose()
    {
        if (sftpClient != null)
        {
            sftpClient.Dispose();
            sftpClient = null;
        }
    }
}