示例

/// 
        /// 要发送的人ID
        /// 消息
        private void SendMessage(string UserID, string StrMessg)
        {
            Como.LogUtil.WriteLog("回复用户" + UserID + "消息");
            string Access_Token = Como.GetAccessToken.GetAccess_token();
            if (Access_Token == "")
                Como.LogUtil.WriteException("SendMessage 未能成功加载Access_Token");
            string Text = @"{
   ""touser"":";
            Text += '"' + UserID + '"';
            Text += "," + '"' + @"msgtype"": ""text"", 
           ""agentid"": ""5"", 
            ""text"": {
           ""content"":";
            Text += '"' + StrMessg + '"';
            Text += @"}, 
    ""safe"": ""0""
}";
            ;
            string url = String.Format("https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={0}", Access_Token);
            string strResult = Como.Tools.GetPage(url, Text);

            JArray ja = (JArray)JsonConvert.DeserializeObject("[" + strResult + "]");
            string Error = "";
            try
            {
                if (strResult.Contains("errcode"))
                {
                    Error = ja[0]["errcode"].ToString();
                }
            }
            catch (Exception ex)
            {
                Como.LogUtil.WriteException("获取strResult,未获取到错误信息" + ex.Message.ToString());
            }
            string errcode = ja[0]["errcode"].ToString();
            string errmsg = ja[0]["errmsg"].ToString();
            if (errcode == "0" && errmsg == "ok")
            {
                Como.LogUtil.WriteLog("回复成功！");
            }
            else
            {
                Como.LogUtil.WriteLog("回复失败！");
                Como.LogUtil.WriteException("回复失败：SendMessage：" + strResult); 
            }
        }

/// 

        /// 根据请求地址 和数据返回请求结果
        /// 
        /// 
        /// 
        /// 
        public static string GetPage(string posturl, string postData)
        {

            Stream outstream = null;

            Stream instream = null;

            StreamReader sr = null;

            HttpWebResponse response = null;

            HttpWebRequest request = null;

            Encoding encoding = Encoding.UTF8;

            byte[] data = encoding.GetBytes(postData);

            // 准备请求...

            try
            {

                // 设置参数

                request = WebRequest.Create(posturl) as HttpWebRequest;

                CookieContainer cookieContainer = new CookieContainer();

                request.CookieContainer = cookieContainer;

                request.AllowAutoRedirect = true;

                request.Method = "POST";

                request.ContentType = "application/x-www-form-urlencoded";

                request.ContentLength = data.Length;

                outstream = request.GetRequestStream();

                outstream.Write(data, 0, data.Length);

                outstream.Close();

                //发送请求并获取相应回应数据

                response = request.GetResponse() as HttpWebResponse;

                //直到request.GetResponse()程序才开始向目标网页发送Post请求

                instream = response.GetResponseStream();

                sr = new StreamReader(instream, encoding);

                //返回结果网页（html）代码

                string content = sr.ReadToEnd();

                string err = string.Empty;

                return content;

            }

            catch (Exception ex)
            {

                string err = ex.Message;
                Como.LogUtil.WriteException("Tools GetPage 异常为："+err.ToString());
                return string.Empty;

            }

        }

参数引用详解：

1.Como.GetAccessToken.GetAccess_token()   //获取 Access_token

2.GetPage  //返回页面请求信息 结果

以上为基础发送关键代码：

以下为：成功后的实例图：