HttpWebRequest envoi de fichier

Bonjour,
J'ai un petit problème en réutilisant le code trouvé dans une autre discussion , j'ai ces données a envoyer avec mon document:
USER_LOGIN
USER_PASSWD
FILE_NAME
FILE_HASH
FILE_HASH_TYPE
DOCATTACH: L’objet à verser.
RTNTYPE: Le format de réponse souhaité TXT ou XML

Le problème est que je ne vois pas quoi mettre dans cette variable sachant que je charge le document après.

Code:

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NameValueCollection myNameValueCollection = new NameValueCollection();
            //put   
string uploadfile = "d:\\test\\test.txt";
           myNameValueCollection.Add("USER_LOGIN","");
           myNameValueCollection.Add("USER_PASSWD","");
           myNameValueCollection.Add("FILE_NAME", "test");
           myNameValueCollection.Add("FILE_HASH", hex);
           myNameValueCollection.Add("FILE_HASH_TYPE","SHA256");
           myNameValueCollection.Add("DOCATTACH", uploadfile);
           myNameValueCollection.Add("RTNTYPE","XML"); 
 
string rep= Post(uri, files, myNameValueCollection);

Code:

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public static string Post(Uri url, string[] files, NameValueCollection parameters)
{
 
    string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
 
    string entete = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\n--" + boundary + "\r\n";
 
    HttpWebRequest httpWebRequest2 = (HttpWebRequest)WebRequest.Create(url);
    httpWebRequest2.ContentType = "multipart/form-data; boundary=" + boundary;
    httpWebRequest2.Method = "POST";
    httpWebRequest2.KeepAlive = true;
    httpWebRequest2.Credentials = System.Net.CredentialCache.DefaultCredentials;
 
    Stream memStream = new System.IO.MemoryStream();
 
    byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
    memStream.Write(boundarybytes, 0, boundarybytes.Length);
 
    string fileTemplate = "Content-Disposition: attachment; name=\"files[]\"; filename=\"{0}\";\r\n Content-Type: application/octet-stream\r\n\r\n";
    byte[] fileBytes;
 
    for (int i = 0; i < files.Length; i++)
    {
 
        if (i == 0)
        {
            foreach (string item in parameters)
            {
                byte[] headerbytes = System.Text.Encoding.ASCII.GetBytes(string.Format(entete, item, parameters[item]));
                memStream.Write(headerbytes, 0, headerbytes.Length);
            }
        }
 
        fileBytes = System.Text.Encoding.ASCII.GetBytes(string.Format(fileTemplate, files[i]));
        memStream.Write(fileBytes, 0, fileBytes.Length);                
        FileStream fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read);
        byte[] buffer = new byte[1024];
        int bytesRead = 0;
        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
        {
            memStream.Write(buffer, 0, bytesRead);
        }
        memStream.Write(boundarybytes, 0, boundarybytes.Length);
        fileStream.Close();
    }
 
    httpWebRequest2.ContentLength = memStream.Length;
    Stream requestStream = httpWebRequest2.GetRequestStream();
    memStream.Position = 0;
    byte[] tempBuffer = new byte[memStream.Length];
    memStream.Read(tempBuffer, 0, tempBuffer.Length);
    memStream.Close();
    requestStream.Write(tempBuffer, 0, tempBuffer.Length);
    requestStream.Close();
    WebResponse webResponse2 = httpWebRequest2.GetResponse();
    Stream stream2 = webResponse2.GetResponseStream();
    StreamReader reader2 = new StreamReader(stream2);
    var result = reader2.ReadToEnd();
 
    webResponse2.Close();
    httpWebRequest2 = null;
    webResponse2 = null;
 
    return result;
}

Pour passer le document a verser avec la variable DOCATTACH il faut que je modifie string fileTemplate ? J'ai du mal à comprendre comment cela marche :calim2:

Code:

 string fileTemplate = "Content-Disposition: attachment; name=\"files[]\"; filename=\"{0}\";\r\n Content-Type: application/octet-stream\r\n\r\n";

Merci de votre aide.