微信通过授权获取用户的基本信息

 1 <%@ WebHandler Language="C#" Class="UserAuth" %>
 2 
 3 public class UserAuth : IHttpHandler
 4 {
 5     public void ProcessRequest(HttpContext context)
 6     {
 7  
 8         var appid = "wxf1c24c60e3ac13b7";
 9         var secret = "5902b9817acb7a290d4b7c2e6e97d4d3";
10 
11         var code = context.Request.QueryString["Code"];
12         if (string.IsNullOrEmpty(code))
13         {
14             var url = string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri=http%3a%2f%2fwx.alinq.org%2fTest%2fUserAuth.ashx&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect", appid);
15             context.Response.Redirect(url);
16         }
17         else
18         {
19             var client = new System.Net.WebClient();
20             client.Encoding = System.Text.Encoding.UTF8;
21 
22             var url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code", appid, secret, code);
23             var data = client.DownloadString(url);
24 
25             var serializer = new JavaScriptSerializer();
26             var obj = serializer.Deserialize<Dictionary<string, string>>(data);
27             string accessToken;
28             if (!obj.TryGetValue("access_token", out accessToken))
29                 return;
30 
31             var opentid = obj["openid"];
32             url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN", accessToken, opentid);
33             data = client.DownloadString(url);
34             var userInfo = serializer.Deserialize<Dictionary<string, object>>(data);
35             foreach (var key in userInfo.Keys)
36             {
37                 context.Response.Write(string.Format("{0}: {1}", key, userInfo[key]) + "<br/>");
38             }
39         }
40     }
41 }