为什么我得到＆＃34;所需的URI不是有效的FTP命令。＆＃34;

Question

我尝试使用Microsoft C＃中的示例。 The link is here.

但是我现在得到了标题中的错误（认为它从丹麦语翻译成英语）

它说有问题的路线是： Stream ftpstream = ftp.GetRequestStream();

（当然在真实的代码中我的实际地址和传递。）

（我也尝试创建一个文件夹，但它有效）

整个功能是：

public static void MakeFTPFile(string FileName,string[] Lines)
{
    string sourcefilepath = "";
    string ftpurl = "ftp://ftpAdress";
    string ftpusername = "Username";
    string ftppassword = "Pass";

    FileName += ".txt";

    if (!File.Exists(FileName))
    {
        // Create a file to write to. 
        using (StreamWriter sw = File.CreateText(FileName))
        {
            for (int i = 0; i < Lines.Length; i++)
            {
                sw.WriteLine(Lines[i]);
            }
        }
    }

    string filename = Path.GetFileName(FileName);
    string ftpfullpath = ftpurl;
    FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(ftpfullpath);
    ftp.Credentials = new NetworkCredential(ftpusername, ftppassword);

    ftp.KeepAlive = true;
    ftp.UseBinary = true;
    ftp.Method = WebRequestMethods.Ftp.UploadFile;

    FileStream fs = File.OpenRead(FileName);
    byte[] buffer = new byte[fs.Length];
    fs.Read(buffer, 0, buffer.Length);
    fs.Close();

    Stream ftpstream = ftp.GetRequestStream();
    ftpstream.Write(buffer, 0, buffer.Length);
    ftpstream.Close();
}