.net微信开发 如何获取AccessToken_实用技巧_

 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(retString); res.access_token = token.access_token; res.expires_in = token.expires_in; } return res; } 

 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; /// 
 /// 获取到的凭证 /// 
 public string access_token { get { return _access_token; } set { _access_token = value; } } /// 
 /// 凭证有效时间，单位：秒 /// 
 public string expires_in { get { return _expires_in; } set { _expires_in = value; } } } 

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