C# .net MVC 微信红包

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C# .net MVC 微信红包

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openid
string 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openid
    string url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack"; 
    string orderNo = 商户号 + DateTime.Now.ToString("yyyymmdd")+"随机10位数字";//商户订单号 组成:mch_id+yyyymmdd+10位一天内不能重复的数字。 
    string Code = ""//32为随机字符串; string key="key=" + "";//支付密钥(在商户平台设置32为字符串) 
    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 "";
    }
}   

以下是微信开发官方相关文档

1.【微信支付】公众号支付开发者文档  2. 微信开放平台  3.企业号开发者接口文档  4.微信公众平台开发者文档



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