获取流的参数信息

  System.IO.Stream s = System.Web.HttpContext.Current.Request.InputStream;
                int count = 0;
                byte[] buffer = new byte[1024];
                StringBuilder builder = new StringBuilder();

                while ((count = s.Read(buffer, 0, 1024)) > 0)
                {
                    builder.Append(Encoding.UTF8.GetString(buffer, 0, count));
                }