asp.net网站实现接入QQ登录示例代码

  string client_id = "分配的APP ID";  string appid = " 分配的 APP KEY";  string Return_url = "返回处理的url";  public string Authorize()  {   string state = new Random(100000).Next(99, 99999).ToString();//随机数   HttpHelper http = new HttpHelper();   string url = string.Format("https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id={0}&redirect_uri={1}&state={2}", client_id, Return_url, state);   string str="<script> location.href='" + url + "'</script>";   return str;    }

 protected void Page_Load(object sender, EventArgs e)  {    QQ_Login q = new QQ_Login();   string url = q.Authorize();//这里调用   Response.Write(url);  }

  public User_info Back_User(string code)  {   string state = new Random(100000).Next(99, 99999).ToString();//随机数   User_info ui = new User_info();   string url = string.Format("https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&client_id={0}&client_secret={1}&code={2}&redirect_uri={3}&state={4}", client_id, appid, code, Return_url, state);   string uu = HttpHelper.HtmlFromUrlGet(url);//处理http请求帮助类   string code1 = uu.Split('&')[0].Split('=')[1].ToString();//获得access_token    //根基access_token获取用户唯一OpenID   string url_me = string.Format("https://graph.qq.com/oauth2.0/me?access_token={0}" , code1);    string callback = HttpHelper.HtmlFromUrlGet(url_me);//这里获取的   callback = callback.Substring(callback.IndexOf('(') + 1, (callback.IndexOf(')') - callback.IndexOf('(') - 1)).Trim();   // dynamic jsonP = JValue.FromObject(callback); //这里我用的是一个序列化类库 Newtonsoft.Json.dll 6.0.4版本无奈公司版本过低 只能用4.0的版本 建议使用6.0.4版本   a jsonP = JsonConvert.DeserializeObject<a>(callback);//Newtonsoft.Json.dll 4.0或4.5版本   string OpenID = jsonP.openid;//获取用户唯一的OpenID     //根据OpenID获取用户信息 可以显示更多 用的就几个 需要的可以自己在下面加   string getinfo = string.Format("https://graph.qq.com/user/get_user_info?access_token={0}&oauth_consumer_key={1}&openid={2}", code1, client_id, OpenID);   string user = HttpHelper.HtmlFromUrlGet(getinfo);   b info = JsonConvert.DeserializeObject<b>(user);   ui.Name = info.nickname;   ui.OpenID = OpenID;   ui.img_qq100 = info.figureurl_qq_1;   ui.img_qq50 = info.figureurl_qq_2;   ui.city = info.city;   ui.year = info.year;   ui.Type = 1;   return ui;    }

User_info ui = new User_info();     var verifier = Request.Params["code"]; //获取Authorization Code     ui = q.Back_User(verifier); 掉用方法并返回数据

  public class User_info  {   public string OpenID { get; set; }//用户唯一appid    public string Name { get; set; }     public string img_qq50 { get; set; } //QQ图像40*40    public string img_qq100 { get; set; }    public string city { get; set; }   public int year { get; set; }   }

 public class a {   public string client_id { get; set; }   public string openid { get; set; } }