我试图使用此代码将文件上传到FTP,我遇到的问题是,当语法命中serverURI.Scheme！= Uri.UriSchemeFtp时,它返回false.这是否意味着我的URI地址设置不正确？我知道这是一个有效的地址,我使用ftptest.net来验证网站是否正常运行.我的语法有什么不对？

private void button1_Click(object sender, EventArgs e)
{
  Uri serverUri = new Uri("ftps://afjafaj.org");
  string userName = "Ricard";
  string password = "";
  string filename = "C:\\Book1.xlsx";
  ServicePointManager.ServerCertificateValidationCallback = AcceptAllCertificatePolicy;
  UploadFile(serverUri, userName, password, filename);
}

public bool AcceptAllCertificatePolicy(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
  return true;
}

public bool UploadFile(Uri serverUri, string userName, string password, string fileName)
{
  if (serverUri.Scheme != Uri.UriSchemeFtp)
    return false;

  try
  {
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
    request.EnableSsl = true;
    request.Credentials = new NetworkCredential(userName, password);
    request.Method = WebRequestMethods.Ftp.UploadFile;
    StreamReader sourceStream = new StreamReader(fileName);
    byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
    sourceStream.Close();
    request.ContentLength = fileContents.Length;
    Stream requestStream = request.GetRequestStream();
    requestStream.Write(fileContents, 0, fileContents.Length);
    requestStream.Close();

    FtpWebResponse response = (FtpWebResponse)request.GetResponse();
    Console.WriteLine("Response status: {0}", response.StatusDescription);
  }
  catch (Exception exc)
  {
    throw exc;
  }
  return true;
}

解决方法:

ftps：//前缀不是standard IANA URI scheme.只有ftp：// scheme,由RFC 1738定义.

无论如何,ftps：//仍被某些软件识别为引用FTP over TLS / SSL协议(安全FTP).这模仿https：//方案,它是HTTP over TLS / SSL(https：//是标准方案).

虽然.NET框架无法识别ftps：//.

要通过TLS / SSL连接到显式模式FTP,请将URI更改为ftp：//,并将FtpWebRequest.EnableSsl设置为true(您已经在做什么).

请注意,ftps：//前缀通常是指通过TLS / SSL的隐式模式FTP. .NET框架仅支持显式模式.虽然你的URI确实是指隐式模式,但大多数服务器都支持显式模式.所以这通常不会成为问题.对于显式模式,有时会使用ftpes：//.请参阅我的文章,了解FTP over TLS/SSL implicit and explicit modes之间的区别.