C# app: simulate form post in a command line application

[amphibian1]

Hello,

I am writing a C# command line application that uploads files to a website. Basically, imagine this form in a web application:

[HTML]<form method="post" enctype="mulipa rt/form-data" action="http://www.myfilestora ge.com/">
<input type="text" name="documentI d" value="123" />
<input type="file" name="document" value="C:\myfil e.doc" />
</form>[/HTML]

I need the same thing to happen in my command line application as what would happen in the web application when that form gets submitted. In other words, I have to make a request to a specific URL with two parameters: one text parameter and one file parameter. Does anyone know how to do this?

Here's what I have so far:

void UploadDocument(int documentId, byte[] documentBytes)
{
  //create a new request
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.myfilestorage.com/");
  request.Method = "POST";
  request.ContentType = "multipart/form-data";
 
  //write the parameters to the request
  Stream requestStream = request.GetRequestStream();
  /* ???? */
  requestStream.Close();
 
  //get the response to the request
  HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  response.Close();
}

[amphibian1]

I've figured out a solution. Here it is:

void UploadDocument(int documentId, string fileName, byte[] fileBytes)
{
  //create a new request
  string boundary = "AaB03x";
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.myfilestorage.com/");
  request.Method = "POST";
  request.ContentType = "multipart/form-data; boundary=" + boundary + ";";
 
  byte[] beforeFileBytes = Encoding.UTF8.GetBytes(
    "--" + boundary + "\r\n" +
    "Content-Disposition: form-data; name=\"documentId\"\r\n\r\n" +
    documentId + "\r\n" +
    "--" + boundary + "\r\n" +
    "Content-Disposition: form-data; name=\"document\"; filename=\"" + fileName + "\"\r\n" +
    "Content-Type: application/octet-stream\r\n" +
    "Content-Transfer-Encoding: binary\r\n\r\n");
 
  byte[] afterFileBytes = Encoding.UTF8.GetBytes("\r\n" +
    "--" + boundary + "--" + "\r\n");
 
  byte[] postData = new byte[beforeFileBytes.Length + fileBytes.Length + afterFileBytes.Length];
 
  Stream stream = new MemoryStream(postData);
  stream.Write(beforeFileBytes, 0, beforeFileBytes.Length);
  stream.Write(fileBytes, 0, fileBytes.Length);
  stream.Write(afterFileBytes, 0, afterFileBytes.Length);
  stream.Close();
 
  //write the post data to the request
  request.ContentLength = postData.Length;
  Stream requestStream = request.GetRequestStream();
  this.WriteToStream(requestStream, postData);
  requestStream.Close();
 
  //get the response
  WebResponse response = request.GetResponse();
  response.Close();
}