这期内容当中小编将会给大家带来有关如何使用.net构建微信服务号发送红包，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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/oauth3/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 = "/tupian/20230522/access_token
string data = RequestUrl(st);
//拿到用户openid
string openid=GetJsonValue(data, "openid");
//获取用户其他信息
string url = "/tupian/20230522/info
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 data = new Dictionary(); 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 data,string paykey)
{
string retStr;
MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();
var data1=from d in data orderby d.Key select d;
string data2 = "";
string 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+""+ "";
}
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 += "" + retStr + " ";//签名
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 "";
}
} 上述就是小编为大家分享的如何使用.net构建微信服务号发送红包了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
