FTP にアクセスできる資格情報を使用していることを確認してください。また、URL はおそらくftp://www.domain.com/のようなものになるでしょう。
過去に使用した FTP コードを次に示します。
public class FTP
{
private String Username { get; set; }
private String Password { get; set; }
private String Host { get; set; }
private Int32 Port { get; set; }
public FTP(String username, String password, String host, Int32 port)
{
Username = username;
Password = password;
Host = host;
Port = port;
}
private Uri BuildServerUri(string Path)
{
return new Uri(String.Format("ftp://{0}:{1}/{2}", Host, Port, Path));
}
/// <summary>
/// Upload a byte[] to the FTP server
/// </summary>
/// <param name="path">Path on the FTP server (upload/myfile.txt)</param>
/// <param name="Data">A byte[] containing the data to upload</param>
/// <returns>The server response in a byte[]</returns>
private byte[] UploadData(string path, byte[] Data)
{
// Get the object used to communicate with the server.
WebClient request = new WebClient();
try
{
// Logon to the server using username + password
request.Credentials = new NetworkCredential(Username, Password);
return request.UploadData(BuildServerUri(path), Data);
}
finally
{
if (request != null)
request.Dispose();
}
}
/// <summary>
/// Load a file from disk and upload it to the FTP server
/// </summary>
/// <param name="ftppath">Path on the FTP server (/upload/myfile.txt)</param>
/// <param name="srcfile">File on the local harddisk to upload</param>
/// <returns>The server response in a byte[]</returns>
public byte[] UploadFile(string ftppath, string srcfile)
{
// Read the data from disk
FileStream fs = new FileStream(srcfile, FileMode.Open);
try
{
byte[] FileData = new byte[fs.Length];
int numBytesToRead = (int)fs.Length;
int numBytesRead = 0;
while (numBytesToRead > 0)
{
// Read may return anything from 0 to numBytesToRead.
int n = fs.Read(FileData, numBytesRead, numBytesToRead);
// Break when the end of the file is reached.
if (n == 0) break;
numBytesRead += n;
numBytesToRead -= n;
}
numBytesToRead = FileData.Length;
// Upload the data from the buffer
return UploadData(ftppath, FileData);
}
finally
{
if (fs != null)
fs.Close();
if (fs != null)
fs.Dispose();
}
}
}