C# 微信接口之推送模版消息

 public string SendTempletMessge()    {      string strReturn = string.Empty;      try      {          #region 获取access_token          string apiurl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=你的appid&secret=你的secret";          WebRequest request = WebRequest.Create(@apiurl);          request.Method = "POST";          WebResponse response = request.GetResponse();          Stream stream = response.GetResponseStream();          Encoding encode = Encoding.UTF8;          StreamReader reader = new StreamReader(stream, encode);          string detail = reader.ReadToEnd();          var jd = JsonConvert.DeserializeObject<WXApi>(detail);          string token = (String)jd.access_token;          #endregion          #region 组装信息推送，并返回结果（其它模版消息于此类似）          string url = "https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=" + token;          string temp = "{\"touser\": \"" + UserInfo.OpenID + "\"," +                        "\"template_id\": \"f3kRRjJeyLDf4tndtg-OJeRvgEdgjjDxCy4T9kuwM70\", " +                        "\"topcolor\": \"#FF0000\", " +                        "\"data\": " +                        "{\"first\": {\"value\": \"您好，您有一条回款通知信息\"}," +                        "\"keyword1\": { \"value\": \"单位名称\"}," +                        "\"keyword2\": { \"value\": \"日期\"}," +                        "\"keyword3\": { \"value\": \"金额\"}," +                        "\"keyword4\": { \"value\": \"业务员\"}," +                        "\"remark\": {\"value\": \"\" }}}";          #endregion  //核心代码  GetResponseData(temp, @url);          strReturn = "推送成功";      }      catch (Exception ex)      {        strReturn = ex.Message;      }      return strReturn;    }    /// <summary>      /// 返回JSon数据      /// </summary>      /// <param name="JSONData">要处理的JSON数据</param>      /// <param name="Url">要提交的URL</param>      /// <returns>返回的JSON处理字符串</returns>      public string GetResponseData(string JSONData, string Url)    {      byte[] bytes = Encoding.UTF8.GetBytes(JSONData);      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);      request.Method = "POST";      request.ContentLength = bytes.Length;      request.ContentType = "json";      Stream reqstream = request.GetRequestStream();      reqstream.Write(bytes, 0, bytes.Length);      //声明一个HttpWebRequest请求        request.Timeout = 90000;      //设置连接超时时间        request.Headers.Set("Pragma", "no-cache");      HttpWebResponse response = (HttpWebResponse)request.GetResponse();      Stream streamReceive = response.GetResponseStream();      Encoding encoding = Encoding.UTF8;      StreamReader streamReader = new StreamReader(streamReceive, encoding);      string strResult = streamReader.ReadToEnd();      streamReceive.Dispose();      streamReader.Dispose();      return strResult;    }==================================================================================涉及到的实体：public class WXApi  {    public string access_token { set; get; }  }