C# POST请求

 

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public string PostWebRequest(string postUrl, string paramData, Encoding dataEncode)         {             string ret = string.Empty;             try             {                 byte[] byteArray = dataEncode.GetBytes(paramData); //转化                 HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));                 webReq.Method = "POST";                 webReq.ContentType = "application/x-www-form-urlencoded";                 webReq.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36";                   webReq.ContentLength = byteArray.Length;                 Stream newStream = webReq.GetRequestStream();                 newStream.Write(byteArray, 0, byteArray.Length);//写入参数                 newStream.Close();                 HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();                 StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);                 ret = sr.ReadToEnd();                 sr.Close();                 response.Close();                 newStream.Close();             }             catch (Exception ex)             {                 ret = ex.Message;             }             return ret;         }调用/// <summary>         /// 获取投资列表         /// </summary>         /// <param name="option"></param>         /// <returns></returns>         public string InvestList(investlist_options option)         {             string url = "http://localhost:9898/InvestNoView/BorrowList";             string postDataStr = "curpage=2";             string result = PostWebRequest(url, postDataStr,System.Text.Encoding.UTF8);             return result;         }