ASP.NET WeChat Development Interface Guide Detailed Introduction

/// <summary> 
 /// 验证签名 
 /// </summary> 
 /// <param name="signature"></param> 
 /// <param name="timestamp"></param> 
 /// <param name="nonce"></param> 
 /// <returns></returns> 
 public static bool CheckSignature(String signature, String timestamp, String nonce) 
 { 
 String[] arr = new String[] { token, timestamp, nonce }; 
 // 将token、timestamp、nonce三个参数进行字典序排序 
 Array.Sort<String>(arr); 
 
 StringBuilder content = new StringBuilder(); 
 for (int i = 0; i < arr.Length; i++) 
 { 
  content.Append(arr[i]); 
 } 
 
 String tmpStr = SHA1_Encrypt(content.ToString()); 
 
 
 // 将sha1加密后的字符串可与signature对比，标识该请求来源于微信 
 return tmpStr != null ? tmpStr.Equals(signature) : false; 
 } 
 
 
 /// <summary> 
 /// 使用缺省密钥给字符串加密 
 /// </summary> 
 /// <param name="Source_String"></param> 
 /// <returns></returns> 
 public static string SHA1_Encrypt(string Source_String) 
 { 
 byte[] StrRes = Encoding.Default.GetBytes(Source_String); 
 HashAlgorithm iSHA = new SHA1CryptoServiceProvider(); 
 StrRes = iSHA.ComputeHash(StrRes); 
 StringBuilder EnText = new StringBuilder(); 
 foreach (byte iByte in StrRes) 
 { 
  EnText.AppendFormat("{0:x2}", iByte); 
 } 
 return EnText.ToString(); 
 }

 protected void Page_Load(object sender, EventArgs e) 
 { 
 
 if (Request.HttpMethod.ToUpper() == "GET") 
 { 
  // 微信加密签名 
  string signature = Request.QueryString["signature"]; 
  // 时间戳 
  string timestamp = Request.QueryString["timestamp"]; 
  // 随机数 
  string nonce = Request.QueryString["nonce"]; 
  // 随机字符串 
  string echostr = Request.QueryString["echostr"]; 
  if (WeixinServer.CheckSignature(signature, timestamp, nonce)) 
  { 
  Response.Write(echostr); 
  } 
 
 } 
 else if (Request.HttpMethod.ToUpper() == "POST") 
 { 
 
  StreamReader stream = new StreamReader(Request.InputStream); 
  string xml = stream.ReadToEnd(); 
 
  processRequest(xml); 
 } 
 
 
 } 
 
 
 /// <summary> 
 /// 处理微信发来的请求 
 /// </summary> 
 /// <param name="xml"></param> 
 public void processRequest(String xml) 
 { 
 try 
 { 
 
  // xml请求解析 
  Hashtable requestHT = WeixinServer.ParseXml(xml); 
 
  // 发送方帐号（open_id） 
  string fromUserName = (string)requestHT["FromUserName"]; 
  // 公众帐号 
  string toUserName = (string)requestHT["ToUserName"]; 
  // 消息类型 
  string msgType = (string)requestHT["MsgType"]; 
 
  //文字消息 
  if (msgType == ReqMsgType.Text) 
  { 
  // Response.Write(str); 
 
  string content = (string)requestHT["Content"]; 
  if(content=="1") 
  { 
   // Response.Write(str); 
   Response.Write(GetNewsMessage(toUserName, fromUserName)); 
   return; 
  } 
  if (content == "2") 
  { 
   Response.Write(GetUserBlogMessage(toUserName, fromUserName)); 
   return; 
  } 
  if (content == "3") 
  { 
   Response.Write(GetGroupMessage(toUserName, fromUserName)); 
   return; 
  } 
  if (content == "4") 
  { 
   Response.Write(GetWinePartyMessage(toUserName, fromUserName)); 
   return; 
  } 
  Response.Write(GetMainMenuMessage(toUserName, fromUserName, "你好，我是vinehoo,")); 
 
  } 
  else if (msgType == ReqMsgType.Event) 
  { 
  // 事件类型 
  String eventType = (string)requestHT["Event"]; 
  // 订阅 
  if (eventType==ReqEventType.Subscribe) 
  { 
   
   Response.Write(GetMainMenuMessage(toUserName, fromUserName, "谢谢您的关注！,")); 
   
  } 
  // 取消订阅 
  else if (eventType==ReqEventType.Unsubscribe) 
  { 
   // TODO 取消订阅后用户再收不到公众号发送的消息，因此不需要回复消息 
  } 
  // 自定义菜单点击事件 
  else if (eventType==ReqEventType.CLICK) 
  { 
   // TODO 自定义菜单权没有开放，暂不处理该类消息 
  } 
  } 
  else if (msgType == ReqMsgType.Location) 
  { 
  } 
 
 
 } 
 catch (Exception e) 
 { 
  
 } 
 }<pre name="code" class="csharp"> protected void Page_Load(object sender, EventArgs e) 
 { 
 
 if (Request.HttpMethod.ToUpper() == "GET") 
 { 
  // 微信加密签名 
  string signature = Request.QueryString["signature"]; 
  // 时间戳 
  string timestamp = Request.QueryString["timestamp"]; 
  // 随机数 
  string nonce = Request.QueryString["nonce"]; 
  // 随机字符串 
  string echostr = Request.QueryString["echostr"]; 
  if (WeixinServer.CheckSignature(signature, timestamp, nonce)) 
  { 
  Response.Write(echostr); 
  } 
 
 } 
 else if (Request.HttpMethod.ToUpper() == "POST") 
 { 
 
  StreamReader stream = new StreamReader(Request.InputStream); 
  string xml = stream.ReadToEnd(); 
 
  processRequest(xml); 
 } 
 
 
 } 
 
 
 /// <summary> 
 /// 处理微信发来的请求 
 /// </summary> 
 /// <param name="xml"></param> 
 public void processRequest(String xml) 
 { 
 try 
 { 
 
  // xml请求解析 
  Hashtable requestHT = WeixinServer.ParseXml(xml); 
 
  // 发送方帐号（open_id） 
  string fromUserName = (string)requestHT["FromUserName"]; 
  // 公众帐号 
  string toUserName = (string)requestHT["ToUserName"]; 
  // 消息类型 
  string msgType = (string)requestHT["MsgType"]; 
 
  //文字消息 
  if (msgType == ReqMsgType.Text) 
  { 
  // Response.Write(str); 
 
  string content = (string)requestHT["Content"]; 
  if(content=="1") 
  { 
   // Response.Write(str); 
   Response.Write(GetNewsMessage(toUserName, fromUserName)); 
   return; 
  } 
  if (content == "2") 
  { 
   Response.Write(GetUserBlogMessage(toUserName, fromUserName)); 
   return; 
  } 
  if (content == "3") 
  { 
   Response.Write(GetGroupMessage(toUserName, fromUserName)); 
   return; 
  } 
  if (content == "4") 
  { 
   Response.Write(GetWinePartyMessage(toUserName, fromUserName)); 
   return; 
  } 
  Response.Write(GetMainMenuMessage(toUserName, fromUserName, "你好，我是vinehoo,")); 
 
  } 
  else if (msgType == ReqMsgType.Event) 
  { 
  // 事件类型 
  String eventType = (string)requestHT["Event"]; 
  // 订阅 
  if (eventType==ReqEventType.Subscribe) 
  { 
   
   Response.Write(GetMainMenuMessage(toUserName, fromUserName, "谢谢您的关注！,")); 
   
  } 
  // 取消订阅 
  else if (eventType==ReqEventType.Unsubscribe) 
  { 
   // TODO 取消订阅后用户再收不到公众号发送的消息，因此不需要回复消息 
  } 
  // 自定义菜单点击事件 
  else if (eventType==ReqEventType.CLICK) 
  { 
   // TODO 自定义菜单权没有开放，暂不处理该类消息 
  } 
  } 
  else if (msgType == ReqMsgType.Location) 
  { 
  } 
 
 
 } 
 catch (Exception e) 
 { 
  
 } 
 }