C# .net MVC 微信红包(服务号发送红包)

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C# .net MVC 微信红包(服务号发送红包)

注:需要开通微信支付的服务号!

//跳转微信登录页面
public ActionResult Index()
{ViewBag.url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" +{服务号appid} + "&redirect_uri=http%3A%2F%2F" + {微信重定向域名(填写程序域名,例如:www.xxxx.com)} +"%2F"+{程序控制器名,例如:Home}+"%2F"+{程序Action名,例如:RedirectWeChat}+"&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";return View();
}//获取accesstoken(访问微信接口需要)
public static string accesstoken(string WeChatWxAppId, string WeChatWxAppSecret)
{string strJson = HttpRequestUtil.RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", WeChatWxAppId, WeChatWxAppSecret));if (strJson.IndexOf("errcode") == -1){return GetJsonValue(strJson, "access_token");}else{return "";}
}
//解析json
public static string GetJsonValue(string jsonStr, string key)
{string result = string.Empty;if (!string.IsNullOrEmpty(jsonStr)){key = "\"" + key.Trim('"') + "\"";int index = jsonStr.IndexOf(key) + key.Length + 1;if (index > key.Length + 1){//先截逗号，若是最后一个，截“｝”号，取最小值int end = jsonStr.IndexOf(',', index);if (end == -1){end = jsonStr.IndexOf('}', index);}result = jsonStr.Substring(index, end - index);result = result.Trim(new char[] { '"', ' ', '\'' }); //过滤引号或空格}}return result;
}//请求url
public static string RequestUrl(string url, string method="post")
{// 设置参数HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;CookieContainer cookieContainer = new CookieContainer();request.CookieContainer = cookieContainer;request.AllowAutoRedirect = true;request.Method = method;request.ContentType = "text/html";request.Headers.Add("charset", "utf-8");//发送请求并获取相应回应数据HttpWebResponse response = request.GetResponse() as HttpWebResponse;//直到request.GetResponse()程序才开始向目标网页发送Post请求Stream responseStream = response.GetResponseStream();StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);//返回结果网页（html）代码string content = sr.ReadToEnd();return content;
}
//接收微信返回code
//接收微信数据获取用户信息
public ActionResult RedirectWeChat(string code, string state)
{if (string.IsNullOrEmpty(code)){return Content("您拒绝了授权！");}string access_token = accesstoken(微信AppId, 微信AppSecret);string st = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + 微信AppId + "&secret=" + 微信AppSecret + "&code=" + code + "&grant_type=authorization_code";string data = RequestUrl(st);//拿到用户openidstring openid=GetJsonValue(data, "openid");//获取用户其他信息string url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token="+ access_token + "&openid=" + openid + "&lang=zh_CN";data = RequestUrl(url);string subscribe=GetJsonValue(data, "subscribe");if (subscribe == "0"){///未关注return RedirectToAction("");}return RedirectToAction("");
}//发送红包Action
public ActionResult HB()
{string openid = "";//用户openidstring url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack"; //商户订单号 组成：mch_id+yyyymmdd+10位一天内不能重复的数字。 string orderNo = 商户号 + DateTime.Now.ToString("yyyymmdd")+"随机10位数字";//支付密钥(在商户平台设置32为字符串) string Code = ""//32为随机字符串; string key="key=" + "";Dictionary<string, string> data = new Dictionary<string, string>();data.Add("act_name", "");//活动名称 data.Add("client_ip", "192.168.1.1");//Ip地址 data.Add("mch_billno", orderNo);//商户订单号 组成：mch_id+yyyymmdd+10位一天内不能重复的数字。 data.Add("mch_id", "");//商户号 data.Add("nonce_str", Code);//随机字符串 data.Add("re_openid", openid);//用户openid data.Add("remark", "");//备注 data.Add("send_name","");//商户名称 data.Add("total_amount", "100");//付款金额 单位分 data.Add("total_num", "1");//红包发放总人数 data.Add("wishing", "恭喜发财");//红包祝福语 data.Add("wxappid", );//公众账号appid string xml = GetXML(data, key);//签名+拼接xml string str=PostWebRequests(url, xml);//微信返回xml err_code=SUCCESS 就是成功return View(""); 
}//发送红包(MD5签名+拼接XML)
public static string GetXML(Dictionary<string, string> data,string paykey)
{string retStr;MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();var data1=from d in data orderby d.Key select d;string data2 = "";string XML = "<xml>";foreach (var item in data1){//空值不参与签名if (item.Value + "" != ""){data2 += item.Key +"="+ item.Value + "&";}XML += "<" + item.Key + ">" + item.Value+""+ "</" + item.Key + ">";}data2 += paykey;//创建md5对象byte[] inputBye;byte[] outputBye;//使用GB2312编码方式把字符串转化为字节数组．try{inputBye = Encoding.UTF8.GetBytes(data2);}catch{inputBye = Encoding.GetEncoding("GB2312").GetBytes(data2);}outputBye = m5.ComputeHash(inputBye);retStr = System.BitConverter.ToString(outputBye);retStr = retStr.Replace("-", "").ToUpper();XML += "<sign>" + retStr + "</sign>";//签名XML += "</xml>";return XML;
}//发送红包请求Post方法
public static string PostWebRequests(string postUrl, string menuInfo)
{string returnValue = string.Empty;try{Encoding encoding = Encoding.UTF8;byte[] bytes = encoding.GetBytes(menuInfo);string cert = @"E:\cdcert\apiclient_cert.p12";//支付证书路径string password = "1212121";//支付证书密码ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);X509Certificate cer = new X509Certificate(cert, password, X509KeyStorageFlags.MachineKeySet);HttpWebRequest webrequest = (HttpWebRequest)HttpWebRequest.Create(postUrl);webrequest.ClientCertificates.Add(cer);webrequest.Method = "post";webrequest.ContentLength = bytes.Length;webrequest.GetRequestStream().Write(bytes, 0, bytes.Length);HttpWebResponse webreponse = (HttpWebResponse)webrequest.GetResponse();Stream stream = webreponse.GetResponseStream();string resp = string.Empty;using (StreamReader reader = new StreamReader(stream)){return reader.ReadToEnd();}}catch (Exception ex){return "";}
}