WeChat development asp.net

Recently, I am engaged in development, and I am also reading php code, but I still use the c # language. recently I am engaged in development, and I am also reading php code, however, I still use the c # language;

The index. ashx file is created in the background, which is faster;

First, the top references

Using System. IO;
Using System. Xml;

One is to receive xml file streams, and the other is to process xml files later;

Public class index: IHttpHandler {private readonly string Token = "xxxx"; // it is case sensitive and consistent with the Token settings in the public account background. Public void ProcessRequest (HttpContext context) {context. response. contentType = "text/plain"; string signature = context. request ["signature"]; string timestamp = context. request ["timestamp"]; string nonce = context. request ["nonce"]; string echostr = context. request ["echostr"]; if (context. request. httpMethod = "GET") {if (CheckSign (signature, timestamp, nonce) {context. response. output. write (echostr) ;}} else {// post method-when a user wants a public account to send a message, Write the Event} context. response. end ();}

First, set the Token to receive various parameters. the request is sent in get mode;

Here is the CheckSign () function;

Public bool CheckSign (string signature, string timestamp, string nonce) {string [] strs = new string [] {Token, timestamp, nonce}; Array. sort (strs); // Sort string strNew = string. join ("", strs); // connect to the string strNew = System. web. security. formsAuthentication. hashPasswordForStoringInConfigFile (strNew, "SHA1"); // encrypt if (signature = strNew. toLower () return true; return false ;}

In fact, the consciousness here is to receive A/B/C/D, E is custom, B/C/E generates F, and compare with A, returns the output D;

String xmlFromWeChat = new StreamReader (context. request. inputStream ). readToEnd (); // read the XML stream XmlDocument xmldocument = new XmlDocument (); xmldocument. loadXml (xmlFromWeChat); load string fromContent = xmldocument. getElementsByTagName ("Content "). item (0 ). innerText; string fromMsgType = xmldocument. getElementsByTagName ("MsgType "). item (0 ). innerText;

It's hard to write !!

In this way, we can judge the received data and perform corresponding operations. The most important thing is to be familiar with interfaces;

The following example shows that there may be no good abstraction:

Public string receiveText (string xmlFromWeChat) {XmlDocument xmlText = new XmlDocument (); xmlText. loadXml (xmlFromWeChat); string content; string xmlStr; string keyword = xmlText. getElementsByTagName ("Content "). item (0 ). innerText. trim (); content = "Welcome to xxx! "; String [] defArray = {xmlText. getElementsByTagName ("FromUserName "). item (0 ). innerText, xmlText. getElementsByTagName ("ToUserName "). item (0 ). innerText, ConvertDateTimeInt (DateTime. now ). toString (), content}; xmlStr = transmitText (defArray);} return xmlStr ;}

public string transmitText(string[] xmlArray)    {        string xmlstring = @"
                             
  {0}
                              
  {1}
                              
  
   {2}
                              
  text
                              
  {3}
                              
 ";        string xmlstr = string.Format(xmlstring, xmlArray);        return xmlstr;    }

In this way, a simple reply is completed;

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