微信公众平台开发之获得ACCESSTOKEN .Net代码解析

如何认证成为开发者？请点击文章进行查看，成为了开发者之后微信平台会给您appid和secret，在订阅号中是没有的，所以因该申请一下服务号，有了accesstoken才能做添加菜单，上传/下载图片等功能。

private string gettoken()
   {

     // 也可以这样写:
     //return getpage("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=你的appid&secret=你的secret", "");
    
     string res = "";
     httpwebrequest req = (httpwebrequest)httpwebrequest.create("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential
&appid=你的appid&secret=你的secret");
 req.method = "get";
     using (webresponse wr = req.getresponse())
     {
       httpwebresponse myresponse = (httpwebresponse)req.getresponse();


       streamreader reader = new streamreader(myresponse.getresponsestream(), encoding.utf8);


       string content = reader.readtoend();
  
       list<accesstoken> myaccesstoken = json.jsonstringtolist<accesstoken>(content);
       res = myaccesstoken[0].access_token;
 
     }


     return res;
   }
   public string getpage(string posturl, string postdata)
   {
     stream outstream = null;
     stream instream = null;
     streamreader sr = null;
     httpwebresponse response = null;
     httpwebrequest request = null;
     encoding encoding = encoding.utf8;
     byte[] data = encoding.getbytes(postdata);
     // 准备请求...
     try
     {
       // 设置参数
       request = webrequest.create(posturl) as httpwebrequest;
       cookiecontainer cookiecontainer = new cookiecontainer();
       request.cookiecontainer = cookiecontainer;
       request.allowautoredirect = true;
       request.method = "post";
       request.contenttype = "application/x-www-form-urlencoded";
       request.contentlength = data.length;
       outstream = request.getrequeststream();
       outstream.write(data, 0, data.length);
       outstream.close();
       //发送请求并获取相应回应数据
       response = request.getresponse() as httpwebresponse;
       //直到request.getresponse()程序才开始向目标网页发送post请求
       instream = response.getresponsestream();
       sr = new streamreader(instream, encoding);
       //返回结果网页（html）代码
       string content = sr.readtoend();
       string err = string.empty;
       return content;
     }
     catch (exception ex)
     {
       string err = ex.message;
       response.write(err);
       return string.empty;
     }
   }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。