AccessToken and accesstoken

AccessToken and accesstoken

How to obtain AccessToken

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 Class Structure

Public class Access_token {public Access_token () {// TODO: used to verify whether the Access_token has expired. //} string _ access_token; string _ expires_in; /// <summary> /// obtained credential /// </summary> public string access_token {get {return _ access_token;} set {_ access_token = value ;}} /// <summary> // validity period of the credential, in the unit of seconds /// </summary> public string expires_in {get {return _ expires_in ;} set {_ expires_in = value ;}}}

JsonHelper. ParseFromJson Method

/// <Summary> /// convert the JSON object to 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 );}}