微信公共平台开发-（.net实现）2--ACCESSTOKEN值获得

   成功的走出第一步后，我们紧接着趁热打铁开始下一步： 

　　成为了开发者之后微信平台会给您AppId和AppSecret，在订阅号中是没有的，所以因该申请一下服务号，

　　若没有请注意上一篇http://www.cnblogs.com/QLJ1314/p/3837952.html  成为开发者

　　　　有了ACCESSTOKEN才能做添加菜单，上传/下载图片等功能

　　　　所以这次还要借用一下大哥的代码了，上代码：

　原文出处：　http://blog.csdn.net/hemeng1980/article/details/19502455

    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;  

             }  

         }  

 因为后边的大部分操作基本都要根据你的值来操作的。暂时先写这么多吧，明天继续