C#实现微信公众号群发消息（解决一天只能发一次的限制）
经过几天研究网上的代码和谢灿大神的帮忙，今天终于用C#实现了微信公众号群发消息，现在整理一下。
总体思路：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。
我整个项目的代码在下载里面有 http://download.csdn.net/detail/zhangzhilai8/5679269
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);
}
}
C#实现微信公众号群发消息（解决一天只能发一次的限制）
原文：http://www.cnblogs.com/simadi/p/3514827.html
