. Net wechat message template push

Preface ：　　

　　 Recently, wechat message template push function has been used in the project , That is to push the corresponding message to the corresponding user wechat , The premise is that you must have a wechat official account and pay to have this function , In addition, users who want to push must pay attention to your wechat official account .

　　 This process is like this. First, users pay attention to your wechat official account , Get the corresponding user's oppenid, Then you can use the corresponding user oppenid Select the message template corresponding to the discount and push the message to the user .

Realization ：

Add function plug-in ：

Find template message ：

Select the message template corresponding to the discount ：

Parameter description ：

Parameters	If required	explain
touser	yes	The receiver openid
template_id	yes	Templates ID
url	no	Template jump link （ Overseas account no jump ability ）
miniprogram	no	Data required for skipping applets , No need to skip the applet to transfer the data
appid	yes	Applet to jump to appid（ This applet appid It must be bound to the official account of the template message. , Small games are not supported temporarily ）
pagepath	no	The specific page path to jump to the applet , Support with parameters ,（ Example index?foo=bar）, Require the applet to be published , Small games are not supported temporarily
data	yes	Template data
color	no	Template content font color , Default to black if not filled

Code implementation ：

using System;
using System.IO;
using System.Net;
using System.Text;
using Newtonsoft.Json;

namespace JJHL.Service
{
    /// <summary>
    ///  Wechat message push 
    /// </summary>
    public class WxChatPrompt
    {
        public WxChatPrompt()
        {

        }

        private static WxChatPrompt _objPrompt;

        public static WxChatPrompt _
        {
            get => _objPrompt ?? new WxChatPrompt();
            set => _objPrompt = value;
        }

        /// <summary>
        ///  Message push 
        /// </summary>
        /// <param name="Access_token"> Web authorization certificate , Get through wechat interface </param>
        /// <param name="Openid"> Users to push oppenid</param>
        /// <returns></returns>
        public string MsgPush(string Access_token, string Openid)
        {
            string templateId = "";// Template number 
            string firstContent= "";// Content 
            string keyword1 = "";// Custom content 
            string keyword2 = "";// Custom content 
            string keyword3 = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"); // Time 
            string remark = "";// remarks 

            string contentmsg = "{\"touser\":\"" + Openid + "\",\"template_id\":\"" + templateId + "\",\"topcolor\":\"#FF0000\",\"data\":{\"first\":{\"value\":\"" + firstContent + "\",\"color\":\"#173177\"},\"keyword1\":{\"value\":\"" + keyword1 + "\",\"color\":\"#173177\"},\"keyword2\":{\"value\":\"" + keyword2 + "\",\"color\":\"#173177\"},\"keyword3\":{\"value\":\"" + keyword3 + "\",\"color\":\"#173177\"},\"remark\":{\"value\":\"" +remark + "\",\"color\":\"#173177\"}}}";
            string result = WeChatPushNotice(Access_token, contentmsg);

            return result;
        }

        /// <summary>
        /// Wechat message push 
        /// </summary>
        /// <param name="accessToken"> WeChat access_token</param>
        /// <param name="contentMsg"> Push content </param>
        /// <returns></returns>
        public string WeChatPushNotice(string accessToken, string contentMsg)
        {
            string promat = "";
            // Data to be submitted 
            byte[] bs = Encoding.UTF8.GetBytes(contentMsg);
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create("https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=" + accessToken + "");
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            req.ContentLength = bs.Length;
            using (Stream reqStream = req.GetRequestStream())
            {
                reqStream.Write(bs, 0, bs.Length);
            }
            HttpWebResponse respon = (HttpWebResponse)req.GetResponse();
            Stream stream = respon.GetResponseStream();
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                promat = reader.ReadToEnd();
            }
            ReturnMsg y = JsonConvert.DeserializeObject<ReturnMsg>(promat);
            promat = y.errmsg;

            return promat;

        }

        /// <summary>
        ///  Custom model 
        /// </summary>
        private class ReturnMsg
        {
            public string errcode { get; set; }
            public string errmsg { get; set; }
            public string msgid { get; set; }
        }

    }
}

After calling the template message interface , Returns the JSON Data packets . Normal return JSON Packet example ：

 {
    "errcode":0,
     "errmsg":"ok",
     "msgid":200228332
  }