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C# sftp上传和下载文件

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1：首先需要下载依赖的动态库

Renci.SshNet.dll

Renci.SshNet.Async.dll

可以通过NuGet下载



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2：创建 sftpHelper类，对文件进行操作

public class SFTPHelper
{
    private SftpClient sftp;
    
    public bool Connected { get { return sftp.IsConnected; } }
    
    public SFTPHelper(string ip, string port, string user, string pwd)
    {
        sftp = new SftpClient(ip, Int32.Parse(port), user, pwd);
    }
    public bool Connect()
    {
        try
        {
            if (!Connected)
            {
                sftp.Connect();
            }
            return true;
        }
        catch (Exception ex)
        {
            throw new Exception(string.Format("连接SFTP失败：{0}", ex.Message));
        }
    }
    public void Disconnect()
    {
        try
        {
            if (sftp != null && Connected)
            {
                sftp.Disconnect();
            }
        }
        catch (Exception ex)
        {
            throw new Exception(string.Format("断开SFTP失败：{0}", ex.Message));
        }
    }
    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(string.Format("SFTP文件上传失败：{0}", ex.Message));
        }
    }
    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(string.Format("SFTP文件获取失败：{0}", ex.Message));
        }

    }
    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(string.Format("SFTP文件列表获取失败：{0}", ex.Message));
        }
    }

}

3：接下来就可以在主程序中调用即可。

        SFTPHelper sftpUse = new SFTPHelper("127.0.0.1", "22", "root", "123");
        sftpUse.Connect();

        sftpUse.Get("/root/bankbill/1.txt", @"D:\work\1.txt");

        ArrayList tempList = sftpUse.GetFileList("/root/", "txt");

        sftpUse.Disconnect();

可以关注gzh 爱学习的兔八哥，send消息 sftp 就可以获得源代码