c# multipart/form-data submit programmatically

Question

So got an small problem. Im creating an small application to automate an form submission on one website. But the bad thing is that they are using multipart/form-data for tha

Answer 1

posts os multipart/form-data type have a different structure because they are meant to transfer data and not just plain text.

Here's the format:

--[random number, a GUID is good here]
Content-Disposition: form-data; name="[name of variable]"

[actual value]
--[random number, a GUID is good here]--

Using HTTPWebRequest you can create a request that has that format. Here's a sample:

string boundary = Guid.NewGuid().ToString();
string header = string.Format("--{0}", boundary);
string footer = string.Format("--{0}--", boundary);

StringBuilder contents = new StringBuilder();
contents.AppendLine(header);

contents.AppendLine(header);
contents.AppendLine(String.Format("Content-Disposition: form-data; name=\"{0}\"", "username"));
contents.AppendLine();
contents.AppendLine("your_username");

contents.AppendLine(header);
contents.AppendLine(String.Format("Content-Disposition: form-data; name=\"{0}\"", "password"));
contents.AppendLine();
contents.AppendLine("your_password");

contents.AppendLine(footer);