The first step in getting started with C# WeChat development

I don’t want to talk nonsense, just write it! Because it is left for you to write essays, so if you see it, please don’t complain...

1. You must have a WeChat public account
2. You can also apply for a test WeChat account, the link is given to you http://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login
Then, you only need to click a few clicks to create mvc and VS will do it for you. . This is no nonsense
Next, you need to create a general processing program, give it a name casually, passing the test is the key, hurry up...

/// <summary>
 /// 验证微信签名
 /// </summary>
 /// <returns></returns>
 /// * 将token、timestamp、nonce三个参数进行字典序排序
 /// * 将三个参数字符串拼接成一个字符串进行sha1加密
 /// * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。
 private bool CheckSignature()
 {
 var token = "token"; 
 var signature = HttpContext.Current.Request.QueryString["signature"];
 var timestamp = HttpContext.Current.Request.QueryString["timestamp"];
 var nonce = HttpContext.Current.Request.QueryString["nonce"];
 var echostr = HttpContext.Current.Request.QueryString["echostr"];
 string[] ArrTmp = { token, timestamp, nonce };
 Array.Sort(ArrTmp); //字典排序
 var tmpStr = string.Join("", ArrTmp);
 tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");//加密方式

 if (tmpStr.ToLower() == signature)
 {
 return true;
 }
 return false;
 }

This code is equivalent to the [Development] in the WeChat public account - -》[Basic Configuration] The Token you wrote in it is a one-to-one token communication handshake. As long as they communicate with each other, then you are done!

Finishing it is a matter for later, there is still work to be done, let’s continue writing!
How to configure it? This is the problem. You can only use peanut shells to test it first. At least you need to know whether it works after playing for a long time!
Look at the picture below: Peanut shell configuration on the left-----iis website publishing binding on the right

See this picture, you also understand the next step How to play. The local iis is equipped with a domain name. This is so fucking awesome...
Below. We add code. Set up sending and automatic reply tests to see if you can play

 #region 接收消息
 /// <summary>
 /// 接收微信发送的XML消息并且解析
 /// </summary>
 private void ReceiveXml()
 {
 var requestStream = HttpContext.Current.Request.InputStream;
 var requestByte = new byte[requestStream.Length];
 requestStream.Read(requestByte, 0, (int)requestStream.Length);
 var requestStr = Encoding.UTF8.GetString(requestByte);

 if (!string.IsNullOrEmpty(requestStr))
 {
 //封装请求类
 var requestDocXml = new XmlDocument();
 requestDocXml.LoadXml(requestStr);
 var rootElement = requestDocXml.DocumentElement;
 if (rootElement == null) return;
 var wxXmlModel = new WxXmlModel
 {
  ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText,
  FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText,
  CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText,
  MsgType = rootElement.SelectSingleNode("MsgType").InnerText
 };

 switch (wxXmlModel.MsgType)
 {
  case "text"://文本
  wxXmlModel.Content = rootElement.SelectSingleNode("Content").InnerText;
  break;
  case "image"://图片
  wxXmlModel.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
  break;
  case "event"://事件
  wxXmlModel.Event = rootElement.SelectSingleNode("Event").InnerText;
  if (wxXmlModel.Event != "TEMPLATESENDJOBFINISH")//关注类型
  {
  wxXmlModel.EventKey = rootElement.SelectSingleNode("EventKey").InnerText;
  }
  break;
  default:
  break;
 }

 ResponseXML(wxXmlModel);//回复消息
 }
 }
 #endregion

 #region 回复消息
 private void ResponseXML(WxXmlModel WxXmlModel)
 {
 var QrCodeApi = new QrCodeApi();
 var XML = "";
 switch (WxXmlModel.MsgType)
 {
 case "text"://文本回复
  XML = ResponseMessage.GetText(WxXmlModel.FromUserName, WxXmlModel.ToUserName, WxXmlModel.Content);
  break;
 case "event":
  switch (WxXmlModel.Event)
  {
  case "subscribe":
  if (string.IsNullOrEmpty(WxXmlModel.EventKey))
  {
  XML = ResponseMessage.GetText(WxXmlModel.FromUserName, WxXmlModel.ToUserName, "关注成功");
  }
  else
  {
  XML = ResponseMessage.SubScanQrcode(WxXmlModel.FromUserName, WxXmlModel.ToUserName, WxXmlModel.EventKey);//扫描带参数二维码先关注后推送事件
  }
  break;
  case "SCAN":
  XML = ResponseMessage.ScanQrcode(WxXmlModel.FromUserName, WxXmlModel.ToUserName, WxXmlModel.EventKey);//扫描带参数二维码已关注 直接推送事件
  break;
  }
  break;
 default://默认回复
  break;
 }
 HttpContext.Current.Response.Write(XML);
 HttpContext.Current.Response.End();
 }
 #endregion

The above one is sent and the other is received, still in the WhApi.ashx handler file. I just want to make it clear, haha!
Because your handshake with the public platform was successful, you must send something to try, right~~
The picture below is the association between a receiving method and an automatic matching reply file. Don’t worry, I will upload this below. document!

There is still one missing configuration, that is, to set [Debug] ---- [Attach to process] for VS, you only need to change the following [Show all user processes] Check one item and you will be able to find w3wp.exe. If there are multiple such processes, you still have to confirm the [User Name] column, select the one with the same name as your program pool, click OK, click Attach, and confirm the attachment!
Next. It’s fun……………………………………………………………………
Scan the test public account on WeChat and send a customized message to see what kind of reply there is, the above The configuration is cumbersome, and you can add breakpoints for debugging. Otherwise, there is no point in doing so much, right? Just make sure that the sending and receiving are consistent with your own settings, then it will be ok.
That's it.........it's finished.

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