1        string client_id = "分配的APP ID";
 2        string appid = " 分配的 APP KEY";
 3        string Return_url = "返回处理的url";
 4        public string Authorize()
 5        {
 6            string state = new Random(100000).Next(99, 99999).ToString();//随机数
 7            HttpHelper http = new HttpHelper();
 8            string url = string.Format("https://graph.qq.com/oauth2.0/authorizeresponse_type=code&client_id={0}&redirect_uri={1}&state={2}", client_id, Return_url, state);
 9           string str="<script> location.href='" + url + "'</script>";
10           return str;
11        
12        }

1  protected void Page_Load(object sender, EventArgs e)
2     { 
3         QQ_Login q = new QQ_Login();
4         string url = q.Authorize();//这里调用
5         Response.Write(url);
6     }

 1        public User_info Back_User(string code)
 2        {
 3            string state = new Random(100000).Next(99, 99999).ToString();//随机数
 4            User_info ui = new User_info();
 5            string url = string.Format("https://graph.qq.com/oauth2.0/tokengrant_type=authorization_code&client_id={0}&client_secret={1}&code={2}&redirect_uri={3}&state={4}", client_id, appid, code, Return_url, state);
 6            string uu = HttpHelper.HtmlFromUrlGet(url);//处理http请求帮助类
 7            string code1 =  uu.Split('&')[0].Split('=')[1].ToString();//获得access_token
 8 
 9            //根基access_token获取用户唯一OpenID
10           string url_me = string.Format("https://graph.qq.com/oauth2.0/meaccess_token={0}" , code1); 
11            string callback = HttpHelper.HtmlFromUrlGet(url_me);//这里获取的
12            callback = callback.Substring(callback.IndexOf('(') + 1, (callback.IndexOf(')') - callback.IndexOf('(') - 1)).Trim();
13            //  dynamic jsonP = JValue.Parse(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
14            a jsonP = JsonConvert.DeserializeObject<a>(callback);//Newtonsoft.Json.dll 4.0或4.5版本
15            string OpenID = jsonP.openid;//获取用户唯一的OpenID  
16 
17            //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
18            string getinfo = string.Format("https://graph.qq.com/user/get_user_infoaccess_token={0}&oauth_consumer_key={1}&openid={2}", code1, client_id, OpenID);
19            string user = HttpHelper.HtmlFromUrlGet(getinfo);
20            b info = JsonConvert.DeserializeObject<b>(user);
21            ui.Name = info.nickname;
22            ui.OpenID = OpenID;
23            ui.img_qq100 = info.figureurl_qq_1;
24            ui.img_qq50 = info.figureurl_qq_2;
25            ui.city = info.city;
26            ui.year = info.year;
27            ui.Type = 1;
28            return ui; 
29    
30        }

1            
2                  User_info ui = new User_info();
3                  var verifier = Request.Params["code"]; //获取Authorization Code
4                  ui = q.Back_User(verifier); 掉用方法并返回数据

 1     public class User_info
 2     {
 3         public string OpenID { get; set; }//用户唯一appid
 4 
 5         public string Name { get; set; } 
 6 
 7         public string img_qq50 { get; set; } //QQ图像40*40
 8 
 9         public string img_qq100 { get; set; }
10 
11         public string city { get; set; }
12 
13         public int year { get; set; } 
14     }

1    public class a {
2 
3        public string client_id { get; set; }
4 
5        public string openid { get; set; }
6    }