微信公众平台(开发模式)

Ps：是一名菜鸟，第一次写文章，写得不好还请多多指教！！！最近刚好应公司需求研究开发微信公众平台，就记录起来！！！

现在的很多商家、媒体都有开发对应的微信公众平台，我们可以从http://mp.weixin.qq.com/网上进行注册申请。注册可以注册个人的和组织的，个人的没有自定义菜单功能，组织的可以自定义菜单，注册成功后，可以在高级功能里面看到编辑模式和开发模式，只能选择其中一种，本文主要介绍开发模式。

在进行开发模式前，得先了解微信消息的几种类型，可以登录后，查看公众平台API里面查看，然后我们可以根据消息类型创建对应的实体类，接收和发送的格式都xml格式。

运用开发模式，需要有自己的域名和服务器，进去开发模式需要填写URL和Token，你需要先把你开发的程序部署在服务器上，才能填写。Token要与程序中定义的对应。先代码再解释：

  

 const string Token = "你定义的Token";
      
        protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.HttpMethod.ToLower() == "post")
            {
                //WriteLog(Request.ContentLength.ToString());
                System.IO.Stream s = System.Web.HttpContext.Current.Request.InputStream;
                byte[] b = new byte[s.Length];
                s.Read(b, 0, (int)s.Length);
                string postStr = System.Text.Encoding.UTF8.GetString(b);
                if (!string.IsNullOrEmpty(postStr))
                {

                    WriteLog(postStr);
                    DealPost(postStr);
                }

            }
            else
            {
                Valid();
                //string get = Request["echostr"];
                //Response.Write(get);
               
            }
        }
     
        
        private bool CheckSignature()
        {
            string signature = Request.QueryString["signature"].ToString();
            string timestamp = Request.QueryString["timestamp"].ToString();
            string nonce = Request.QueryString["nonce"].ToString();
            string[] ArrTmp = { Token, timestamp, nonce };
            Array.Sort(ArrTmp);     //字典排序
            string tmpStr = string.Join("", ArrTmp);
            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
            tmpStr = tmpStr.ToLower();
            if (tmpStr == signature)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        private void Valid()
        {
            string echoStr = Request.QueryString["echoStr"]??"test";
            if (CheckSignature())
            {
                if (!string.IsNullOrEmpty(echoStr))
                {
                    Response.Write(echoStr);
                   // Response.End();
                }
            }
        }

        private void DealPost(string postStr)
        {
           
            csWXLogic wx = new csWXLogic();
            DealXml dx = new DealXml(postStr);
            string res = "";
           
            int mdatetime = ResponseWeixin.ConvertDateTimeInt(DateTime.Now);               
            if (dx.MsgType.Equals("text"))
            {
                //处理文本消息
               TextType tt = dx.NewTextType(dx.Xn);
                res = wx.GlobalExecute(tt.Content + "#" + tt.FromUserName);
              
                Response.ContentEncoding = Encoding.UTF8;
                Response.Write(ResponseWeixin.ResponseText(res, tt.FromUserName, tt.ToUserName, mdatetime.ToString()));
            }
            if (dx.MsgType.Equals("event"))
            {
                EventType et = dx.NewEnentType(dx.Xn);
                switch (et.Event)
                {
                    case "subscribe":
                        res = wx.GlobalExecute("000");break;
                    case "CLICK":
                       res = wx.GlobalExecute(et.EventKey + "#" + et.FromUserName); break;
                       
                }
                
                   
                
                Response.ContentEncoding = Encoding.UTF8;
                Response.Write(ResponseWeixin.ResponseText(res, et.FromUserName, et.ToUserName, mdatetime.ToString()));
            }
            if (dx.MsgType.Equals("location"))
            {
                LocationType lt = dx.NewLocationType(dx.Xn);
                res = wx.GlobalExecute(lt.Location_X + "＋" + lt.Location_Y + "#" + lt.FromUserName);
                Response.ContentEncoding = Encoding.UTF8;
                Response.Write(ResponseWeixin.ResponseText(res, lt.FromUserName, lt.ToUserName, mdatetime.ToString()));
            } 
           
        }

ps:在页面加载时候判断是post还是get请求。如果get请求经行验证，接口说明文档有说需要获取signature、timestamp、nonce参数然后排序加密，进行判断返回echoStr，也可以不判定直接返回echoStr。如果是post请求就是处理用户发送的消息，我们判断消息类型，然后创建对应的消息实体，然后根据需要开发自己的业务逻辑。URL的地址:域名/该代码文件。

接下来是自定义菜单。在设置下，可以申请自定义菜单，身体通过后会得到固定的AppId和AppSecret，我们可以根据这两个值获取到access_token，然后请求https://api.weixin.qq.com/cgi-bin/menu/create?access_token=XXX地址进行创建菜单，create、get、delete对应创建、查询、删除菜单，这些操作每天有次数限制。菜单只需本地自己执行一次，不用放在用户请求里面。

  

 public string getAccess_token()
        {
            string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + AppId + "&secret=" + AppSecret;
            string result = "";
            CookieContainer cc = new CookieContainer();
            HttpWebRequest http = (HttpWebRequest)WebRequest.Create(url);
            http.CookieContainer = cc;
            http.Method = "GET"; //必须是get方式请求 
            http.ContentType = "application/x-www-form-urlencoded";
            http.Timeout = 30000;
            HttpWebResponse webResponse = (HttpWebResponse)http.GetResponse();
            using (Stream streamReceive = webResponse.GetResponseStream())
            {
                using (StreamReader sr = new StreamReader(streamReceive, Encoding.UTF8))
                {
                    result = sr.ReadToEnd();
                }
            }

            var accessToken = Json.Decode(result);
            var a = accessToken.access_token;
            return a;
        }
    
        public void createMenu()
        {
            string result = string.Empty;
            string accessToken = getAccess_token();
            string user_define_menu = "{\"button\":[{\"type\":\"click\",\"name\":\"停车场信息\",\"key\":\"002\"},{\"name\":\"ECT注册\",\"sub_button\":[{\"type\":\"click\",\"name\":\"用户注册\",\"key\":\"001\"},{\"type\":\"click\",\"name\":\"取消注册\",\"key\":\"005\"}]},{\"name\":\"ECT查询\",\"sub_button\":[{\"type\":\"click\",\"name\":\"余额查询\",\"key\":\"003\"},{\"type\":\"click\",\"name\":\"消费明细\",\"key\":\"004\"}]}]}";
            byte[] datamenu = Encoding.Default.GetBytes(user_define_menu);
            string action = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=" + accessToken;
            HttpWebRequest http = (HttpWebRequest)WebRequest.Create(action);
            CookieContainer cc = new CookieContainer();
            http.CookieContainer = cc;
            http.Method = "POST"; //必须是get方式请求 
            http.ContentType = "application/x-www-form-urlencoded";
            http.Timeout = 30000;
            http.ContentLength = datamenu.Length;

            using (Stream streamReceive = http.GetRequestStream())
            {
                streamReceive.Write(datamenu, 0, datamenu.Length);

            }
            HttpWebResponse webResponse = (HttpWebResponse)http.GetResponse();
            using (StreamReader streamReceive = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
            {

                result = streamReceive.ReadToEnd();
                webResponse.Close();

            }
        
            
        }