C#POST数据的两种实现方式

  private string posturl="http://www.chinavb.net/post.aspx";
        public static string PostData(string pType, string pInfo)
        {
            WebClient wc = new WebClient();
            wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
            byte[] postData = Encoding.ASCII.GetBytes("a=" + pType + "&b=" + pInfo);
            byte[] responseData = wc.UploadData(posturl, "POST", postData);
            return Encoding.UTF8.GetString(responseData);
        }