C#實(shí)現(xiàn)微信公眾號(hào)群發(fā)消息(解決一天只能發(fā)一次的限制)實(shí)例分享

更新時(shí)間：2013年09月04日 16:11:40 作者：

經(jīng)過(guò)幾天研究網(wǎng)上的代碼和謝燦大神的幫忙，今天終于用C#實(shí)現(xiàn)了微信公眾號(hào)群發(fā)消息，現(xiàn)在分享一下

總體思路：

1.首先必須要在微信公眾平臺(tái)上申請(qǐng)一個(gè)公眾號(hào)。

2.然后進(jìn)行模擬登陸。（由于我對(duì)http傳輸原理和編程不是特別懂，在模擬登陸的地方，不是特別清楚，希望有大神指教）

3.模擬登陸后會(huì)獲得一個(gè)token（令牌）和cookie。

4.因?yàn)槟M登陸后相當(dāng)于就進(jìn)入了微信公眾平臺(tái)，在這個(gè)里面就可以抓取到需要的數(shù)據(jù)，如公眾好友的昵稱，fakeId。其中的fakeid非常重要，因?yàn)閭鬏敂?shù)據(jù)必須要知道對(duì)方的fakeid。

5.知道對(duì)方的fakeid就可以進(jìn)行數(shù)據(jù)的發(fā)送了。

這里是整個(gè)項(xiàng)目的源碼下載：http://http://xiazai.jb51.net/201309/yuanma/webchat.rar

不過(guò)里面還有一些小問(wèn)題，希望有人繼續(xù)修改和討論！也有人說(shuō)這樣會(huì)被封號(hào)，所以請(qǐng)謹(jǐn)慎操作
講一下我項(xiàng)目里面的主要內(nèi)容
1.WeiXinLogin.cs類是用來(lái)執(zhí)行登陸功能的

復(fù)制代碼代碼如下:

//對(duì)密碼進(jìn)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();
    }
//執(zhí)行登陸操作
    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 ";//請(qǐng)求登錄的URL
        try
        {
            CookieContainer cc = new CookieContainer();//接收緩存
            byte[] byteArray = Encoding.UTF8.GetBytes(padata); // 轉(zhuǎn)化
            HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(url);  //新建一個(gè)WebRequest對(duì)象用來(lái)請(qǐng)求或者響應(yīng)url
            webRequest2.CookieContainer = cc;                                      //保存cookie  
            webRequest2.Method = "POST";                                          //請(qǐng)求方式是POST
            webRequest2.ContentType = "application/x-www-form-urlencoded";       //請(qǐng)求的內(nèi)容格式為application/x-www-form-urlencoded
            webRequest2.ContentLength = byteArray.Length;
            Stream newStream = webRequest2.GetRequestStream();           //返回用于將數(shù)據(jù)寫入 Internet 資源的 Stream。
            // Send the data.
            newStream.Write(byteArray, 0, byteArray.Length);    //寫入?yún)?shù)
            newStream.Close();
            HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();
            StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);
            string text2 = sr2.ReadToEnd();
            //此處用到了newtonsoft來(lái)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>
        /// 登錄后得到的令牌
        /// </summary>        
        public static string Token { get; set; }
        /// <summary>
        /// 登錄后得到的cookie
        /// </summary>
        public static CookieContainer LoginCookie { get; set; }
        /// <summary>
        /// 創(chuàng)建時(shí)間
        /// </summary>
        public static DateTime CreateDate { get; set; }
    }

2.在WeiXin.cs類中實(shí)現(xiàn)發(fā)送數(shù)據(jù)

復(fù)制代碼代碼如下:

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);  //對(duì)傳遞過(guò)來(lái)的信息進(jìn)行url編碼
        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); // 轉(zhuǎn)化
        HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(url);
        webRequest2.CookieContainer = cookie; //登錄時(shí)得到的緩存
        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);    //寫入?yún)?shù)    
        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中主要實(shí)現(xiàn)獲取fakeid

復(fù)制代碼代碼如下:

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
            /*獲取用戶信息的url，這里有幾個(gè)參數(shù)給大家講一下，1.token此參數(shù)為上面的token 2.pagesize此參數(shù)為每一頁(yè)顯示的記錄條數(shù)
            3.pageid為當(dāng)前的頁(yè)數(shù)，4.groupid為微信公眾平臺(tái)的用戶分組的組id，當(dāng)然這也是我的猜想不一定正確*/
            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;
            //由于此方法獲取過(guò)來(lái)的信息是一個(gè)html網(wǎng)頁(yè)所以此處使用了正則表達(dá)式，注意：（此正則表達(dá)式只是獲取了fakeid的信息如果想獲得一些其他的信息修改此處的正則表達(dá)式就可以了。）
             Regex r = new Regex("\"fakeId\"\\s\\:\\s\"\\d+\""); //定義一個(gè)Regex對(duì)象實(shí)例
            mc = r.Matches(text2);
            Int32 friendSum = mc.Count;          //好友總數(shù)
            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);
        }
    }