如何将文件上传到我在weebly.com上的ftp

这就是他们所说的使用ftp:

http://www.ipage.com/controlpanel/FTP.bml

您可以使用Web创作工具构建网站，然后使用FTP程序将网页上传到您的iPage帐户。

要使用FTP客户端访问您的帐户，您需要使用FTP用户名和密码连接到FTP.newsexpressmedia.com。

这就是我现在尝试的方法：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Net;
namespace ScrollLabelTest
{
    class FtpFileUploader
    {
        static string ftpurl = "ftp://ftp.newsxpressmedia.com";
        static string filename = @"c:'temp'test.txt";
        static string ftpusername = "newsxpressmediacom";
        static string ftppassword = "*****";
        static string value;
        public static void test()
        {
            try
            {
                // Get the object used to communicate with the server.
                FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpurl);
                request.Method = WebRequestMethods.Ftp.UploadFile;
                // This example assumes the FTP site uses anonymous logon.
                request.Credentials = new NetworkCredential(ftpusername, ftppassword);
                // Copy the contents of the file to the request stream.
                StreamReader sourceStream = new StreamReader(@"c:'temp'test.txt");
                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("Upload File Complete, status {0}", response.StatusDescription);
                response.Close();
            }
            catch(Exception err)
            {
                string t = err.ToString();
            }
        }
    }
}

但我遇到了一个例外：

Stream requestStream = request.GetRequestStream();

例外：

The requested URI is invalid for this FTP command

完整的异常错误消息：

System.Net.WebException was caught
  HResult=-2146233079
  Message=The requested URI is invalid for this FTP command.
  Source=System
  StackTrace:
       at System.Net.FtpWebRequest.GetRequestStream()
       at ScrollLabelTest.FtpFileUploader.test() in e:'test'test'test'FtpFileUploader.cs:line 36
  InnerException: 

第36行是：

Stream requestStream = request.GetRequestStream();

FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(
    ftpUrl + "/" + Path.GetFileName(fileName));