Retrieving data from a POST method in ASP.NET

The data from the request (content, inputs, files, querystring values) is all on this object HttpContext.Current.Request

To read the posted content

StreamReader reader = new StreamReader(HttpContext.Current.Request.InputStream);
string requestFromPost = reader.ReadToEnd();

To navigate through the all inputs

foreach (string key in HttpContext.Current.Request.Form.AllKeys)
{
   string value = HttpContext.Current.Request.Form[key];
}