C#对FTP进行上传下载操作

private void bt_ftp_Click(object sender, EventArgs e)
{
try
{

引用WinSCP类

// Setup session options

            SessionOptions sessionOptions = new SessionOptions
            {
                Protocol = Protocol.Ftp,
                HostName = "ftp域名",
                PortNumber = 21,// SFTP默认端口22
                UserName = "用户名",
                Password = "密码"
            };

            using (Session session = new Session())
            {

                // Connect
                session.Open(sessionOptions);

                // Upload files
                TransferOptions transferOptions = new TransferOptions();
                transferOptions.TransferMode = TransferMode.Binary;

                // remove:bool，成功后是否删除本地文件，默认false
                var transferResult = session.PutFiles(@"D:\123456\*", "/", false, transferOptions);//upload
                 transferResult = session.GetFiles("/*", "D:\\123456789\\", true, transferOptions);//download


                // Throw on any error
                transferResult.Check();

                // Print results
                foreach (TransferEventArgs transfer in transferResult.Failures)
                {
                    Console.WriteLine("DownLoad of {0} Error!", transfer.FileName);
                }
                MessageBox.Show("FTP信息处理成功！");
            }


        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: {0}", ex);
        }
    }