用.net开发微信如何获取AccessToken介绍

AccessToken获取方法

public static Access_token GetAccessToken()  {    string formatString = String.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", AppId, AppSecret);       Access_token res = new Access_token();    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(formatString);    request.Method = "GET";    request.ContentType = "text/html;charset=UTF-8";    HttpWebResponse response = (HttpWebResponse)request.GetResponse();    Stream myResponseStream = response.GetResponseStream();    StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));    string retString = myStreamReader.ReadToEnd();    myStreamReader.Close();    myResponseStream.Close();    if (retString.IndexOf("7200") > 0)    {      Access_token token = new Access_token();      token = JsonHelper.ParseFromJson<Access_token>(retString);      res.access_token = token.access_token;      res.expires_in = token.expires_in;    }    return res;  }

Access_token类结构

public class Access_token  {    public Access_token()    {      //       //TODO:用于验证Access_token是否过期实体      //     }    string _access_token;    string _expires_in;       /// <summary>     /// 获取到的凭证      /// </summary>     public string access_token    {      get { return _access_token; }      set { _access_token = value; }    }       /// <summary>     /// 凭证有效时间，单位：秒     /// </summary>     public string expires_in    {      get { return _expires_in; }      set { _expires_in = value; }    }  }

JsonHelper.ParseFromJson方法

/// <summary>   /// 将JSON对象转换为Model  /// </summary>   /// <typeparam name="T"></typeparam>   /// <param name="szJson"></param>   /// <returns></returns>   public static T ParseFromJson<T>(string szJson)  {    T obj = Activator.CreateInstance<T>();    using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson)))    {      DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());      return (T)serializer.ReadObject(ms);    }  }

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