C#实现微信公众号群发消息(解决一天只能发一次的限制)实例分享

1.首先必须要在微信公众平台上申请一个公众号。

2.然后进行模拟登陆。（由于我对http传输原理和编程不是特别懂，在模拟登陆的地方，不是特别清楚，希望有大神指教）

3.模拟登陆后会获得一个token（令牌）和cookie。

4.因为模拟登陆后相当于就进入了微信公众平台，在这个里面就可以抓取到需要的数据，如公众好友的昵称，fakeId。其中的fakeid非常重要，因为传输数据必须要知道对方的fakeid。

5.知道对方的fakeid就可以进行数据的发送了。

不过里面还有一些小问题，希望有人继续修改和讨论！也有人说这样会被封号，所以请谨慎操作讲一下我项目里面的主要内容1.WeiXinLogin.cs类是用来执行登陆功能的

//对密码进行MD5加密   static string GetMd5Str32(string str)       {          MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();          // Convert the input string to a byte array and compute the hash.            char[] temp = str.ToCharArray();          byte[] buf = new byte[temp.Length];          for (int i = 0; i < temp.Length; i++)          {              buf[i] = (byte)temp[i];          }          byte[] data = md5Hasher.ComputeHash(buf);          // Create a new Stringbuilder to collect the bytes            // and create a string.            StringBuilder sBuilder = new StringBuilder();          // Loop through each byte of the hashed data             // and format each one as a hexadecimal string.            for (int i = 0; i < data.Length; i++)          {              sBuilder.Append(data[i].ToString("x2"));          }          // Return the hexadecimal string.            return sBuilder.ToString();      }  //执行登陆操作      public static bool ExecLogin(string name,string pass)      {          bool result = false;          string password = GetMd5Str32(pass).ToUpper();           string padata = "username=" + name + "&pwd=" + password + "&imgcode=&f=json";          string url = "http://mp.weixin.qq.com/cgi-bin/login?lang=zh_CN ";//请求登录的URL          try          {              CookieContainer cc = new CookieContainer();//接收缓存              byte[] byteArray = Encoding.UTF8.GetBytes(padata); // 转化              HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(url);  //新建一个WebRequest对象用来请求或者响应url              webRequest2.CookieContainer = cc;                                      //保存cookie                webRequest2.Method = "POST";                                          //请求方式是POST              webRequest2.ContentType = "application/x-www-form-urlencoded";       //请求的内容格式为application/x-www-form-urlencoded              webRequest2.ContentLength = byteArray.Length;              Stream newStream = webRequest2.GetRequestStream();           //返回用于将数据写入 Internet 资源的 Stream。              // Send the data.              newStream.Write(byteArray, 0, byteArray.Length);    //写入参数              newStream.Close();              HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();              StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);              string text2 = sr2.ReadToEnd();              //此处用到了newtonsoft来序列化              WeiXinRetInfo retinfo = Newtonsoft.Json.JsonConvert.DeserializeObject<WeiXinRetInfo>(text2);              string token = string.Empty;              if (retinfo.ErrMsg.Length > 0)              {                  token = retinfo.ErrMsg.Split(new char[] { '&' })[2].Split(new char[] { '=' })[1].ToString();//取得令牌                  LoginInfo.LoginCookie = cc;                  LoginInfo.CreateDate = DateTime.Now;                  LoginInfo.Token = token;                  result = true;              }          }          catch (Exception ex)          {              throw new Exception(ex.StackTrace);          }          return result;      }      public static class LoginInfo      {          /// <summary>          /// 登录后得到的令牌          /// </summary>                  public static string Token { get; set; }          /// <summary>          /// 登录后得到的cookie          /// </summary>          public static CookieContainer LoginCookie { get; set; }          /// <summary>          /// 创建时间          /// </summary>          public static DateTime CreateDate { get; set; }      }

2.在WeiXin.cs类中实现发送数据

public static bool SendMessage(string Message, string fakeid)      {          bool result = false;          CookieContainer cookie = null;          string token = null;          cookie = WeiXinLogin.LoginInfo.LoginCookie;//取得cookie          token =  WeiXinLogin.LoginInfo.Token;//取得token          string strMsg = System.Web.HttpUtility.UrlEncode(Message);  //对传递过来的信息进行url编码          string padate = "type=1&content=" + strMsg + "&error=false&tofakeid=" + fakeid + "&token=" + token + "&ajax=1";          string url = "https://mp.weixin.qq.com/cgi-bin/singlesend?t=ajax-response&lang=zh_CN";          byte[] byteArray = Encoding.UTF8.GetBytes(padate); // 转化          HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(url);          webRequest2.CookieContainer = cookie; //登录时得到的缓存          webRequest2.Referer = "https://mp.weixin.qq.com/cgi-bin/singlemsgpage?token=" + token + "&fromfakeid=" + fakeid + "&msgid=&source=&count=20&t=wxm-singlechat&lang=zh_CN";          webRequest2.Method = "POST";          webRequest2.UserAgent = "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1";          webRequest2.ContentType = "application/x-www-form-urlencoded";          webRequest2.ContentLength = byteArray.Length;          Stream newStream = webRequest2.GetRequestStream();          // Send the data.                      newStream.Write(byteArray, 0, byteArray.Length);    //写入参数              newStream.Close();          HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();          StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);          string text2 = sr2.ReadToEnd();          if (text2.Contains("ok"))          {              result = true;          }          return result;      }

3.SendMessage.aspx.cs中主要实现获取fakeid

public static ArrayList SubscribeMP()      {          try          {              CookieContainer cookie = null;              string token = null;              cookie = WeiXinLogin.LoginInfo.LoginCookie;//取得cookie              token = WeiXinLogin.LoginInfo.Token;//取得token              /*获取用户信息的url，这里有几个参数给大家讲一下，1.token此参数为上面的token 2.pagesize此参数为每一页显示的记录条数              3.pageid为当前的页数，4.groupid为微信公众平台的用户分组的组id，当然这也是我的猜想不一定正确*/              string Url = "https://mp.weixin.qq.com/cgi-bin/contactmanagepage?t=wxm-friend&token=" + token + "&lang=zh_CN&pagesize=10&pageidx=0&type=0&groupid=0";              HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(Url);              webRequest2.CookieContainer = cookie;              webRequest2.ContentType = "text/html; charset=UTF-8";              webRequest2.Method = "GET";              webRequest2.UserAgent = "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1";              webRequest2.ContentType = "application/x-www-form-urlencoded";              HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();              StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);              string text2 = sr2.ReadToEnd();              MatchCollection mc;              //由于此方法获取过来的信息是一个html网页所以此处使用了正则表达式，注意：（此正则表达式只是获取了fakeid的信息如果想获得一些其他的信息修改此处的正则表达式就可以了。）               Regex r = new Regex("\"fakeId\"\\s\\:\\s\"\\d+\""); //定义一个Regex对象实例              mc = r.Matches(text2);              Int32 friendSum = mc.Count;          //好友总数              string fackID ="";              ArrayList fackID1 = new ArrayList();              for (int i = 0; i < friendSum; i++)              {                  fackID = mc[i].Value.Split(new char[] { ':' })[1];                  fackID = fackID.Replace("\"", "").Trim();                  fackID1.Add(fackID);              }              return fackID1;     }          catch (Exception ex)          {              throw new Exception(ex.StackTrace);          }      }

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