THEMA:

public object DoWork()
{
  TextFileAdapter write = (TextFileAdapter)AdapterWrite;

  // Name und Inhalt der erzeugten Textdatei holen
  byte [] buf = File.ReadAllBytes(write.Filename);

  // WebRequest holen, Domain und URL anpassen
  WebRequest request = WebRequest.Create("https://www.test.xyz/site.php");

  request.Method = "POST";
  request.ContentType = "application/octet-stream";
  request.ContentLength = buf.Length;
    
  Stream data = request.GetRequestStream();
  data.Write(buf, 0, buf.Length);
  data.Close();

  WebResponse response = request.GetResponse();
    
  // Rückgabe bei Ausführen bei Ende nicht notwendig!
  return null;    
}

public object DoWork()
{
  TextFileAdapter write = (TextFileAdapter)AdapterWrite;

  // Name der erzeugten Textdatei holen
  byte [] buf = File.ReadAllBytes(write.Filename);


  // Domain und URL anpassen
  Uri uri = new Uri("https://www.test.xyz/site.php");

  // HttpWebRequest holen
  HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);

  // Username und Passwort anpassen
  NetworkCredential credential = new NetworkCredential("benutzer", "passwort");

  CredentialCache cache = new CredentialCache();
  cache.Add(uri, "Basic", credential);

  request.Method = "POST";
  request.Credentials = cache;
  request.PreAuthenticate = true; 
  request.ContentType = "application/octet-stream";
  request.ContentLength = buf.Length;
    
  Stream data = request.GetRequestStream();
  data.Write(buf, 0, buf.Length);
  data.Close();

  WebResponse response = request.GetResponse();
    
  // Rückgabe bei Ausführen bei Ende nicht notwendig!
  return null;    
}

public object DoWork()
{
  // Name der erzeugten Textdatei holen, vorheriger Verarbeitungsschritt!
  string sFilename = Parameter["FILENAME"].Value.ToString();
  
  byte [] buf = File.ReadAllBytes(sFilename);


  // Domain und URL anpassen
  Uri uri = new Uri("https://www.test.xyz/site.php");

  // HttpWebRequest holen
  HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);

  // Username und Passwort anpassen
  NetworkCredential credential = new NetworkCredential("benutzer", "passwort");

  CredentialCache cache = new CredentialCache();
  cache.Add(uri, "Basic", credential);

  request.Method = "POST";
  request.Credentials = cache;
  request.PreAuthenticate = true; 
  request.ContentType = "application/octet-stream";
  request.ContentLength = buf.Length;
    
  Stream data = request.GetRequestStream();
  data.Write(buf, 0, buf.Length);
  data.Close();

  WebResponse response = request.GetResponse();
    
  // Rückgabe bei Ausführen bei Ende nicht notwendig!
  return null;    
}