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我在 chilkat 异常中收到以下消息 

  calling ConnectSocket2
    IPV6 enabled connect with NO heartbeat.
    Cannot connect, hostname is zero length
    ConnectFailReason: 1
    Failed to connect to FTP server.
    Failed.   --ConnectOnly_Ftp2
--ChilkatLog

我正在尝试使用 Chilkat 的 Ftp2 类（使用 c#），使用 Connect 方法连接到 FTP 服务器。

以下是我用来连接 FTP2 的课程

   public class FTPClient
   {        
    private Ftp2 m_FtpInfo;

    const int FTP_DEFAULT_PORT = 21;

    public FTPClient()
    {
        m_FtpInfo = null;
    }

    public FTPClient(string userName, string password, string hostName, int port)
    {
        m_FtpInfo = new Ftp2();
        m_FtpInfo.Account = userName;
        m_FtpInfo.ClientIpAddress = hostName;
        m_FtpInfo.Password = password;
        //m_FtpInfo.Port = port;
    }

    public Ftp2 FTPInfo
    {
        get
        {
            if (m_FtpInfo == null)
                m_FtpInfo = new Ftp2();
            return m_FtpInfo;
        }
        set { m_FtpInfo = value; }
    }

    public void Connect()
    {
        lock (this)
        {
            if (m_FtpInfo == null)
            {
                m_FtpInfo = new Ftp2();
            }

            AppConfiguration appConfiguration = AppConfiguration.Instance;
            /*
             * Steps to connect to FTP site using Chilkat
             * 1. Unlock the component by passing the code provided by Chilkat
             * 2. Connect to the Site by specifying the hostname and port
             */

            // Unlock the component.
            if (!m_FtpInfo.UnlockComponent("AnythingWorksFor30DayTrial"))
            {
                throw new FTPConnectionExceptions(CommunicationError.UnlockFailed, m_FtpInfo.LastErrorText);
            }


            // Connect to the FTP server. (use a domain name or IP address)            
            if (!m_FtpInfo.Connect())
            {
                throw new FTPConnectionExceptions(CommunicationError.ConnectionFailed, m_FtpInfo.LastErrorText);
            }
        }
    }

    public void DisposeConnection()
    {
        lock (this)
        {
            if (m_FtpInfo == null) return;

            if (m_FtpInfo.IsConnected)
                m_FtpInfo.Disconnect();

            m_FtpInfo = null;
        }
    }

谁能告诉我哪里出错了？

4

1 回答 1

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该行m_FtpInfo.ClientIpAddress = hostName;不是必需的。要连接的实际主机未设置。

编辑：

Chilkat 示例页面这样设置主机名：

ftp.Hostname = "ftp.chilkatsoft.com";

因此，不要设置 ClientIpAddress（本地 PC 的 ip），而是使用 Hostname。

编辑2：

试试这个：

public FTPClient(string userName, string password, string hostName, int port)
{
    m_FtpInfo = new Ftp2();
    m_FtpInfo.Account = userName;
    m_FtpInfo.Hostname = hostName;
    m_FtpInfo.Password = password;
    //m_FtpInfo.Port = port;
}
于 2012-05-10T09:58:42.687 回答