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Home WeChat Applet WeChat Development C# WeChat public account development--Web page authorization (oauth2.0) to obtain user basic information 2

C# WeChat public account development--Web page authorization (oauth2.0) to obtain user basic information 2

Jan 16, 2017 am 11:06 AM

Preface

This article implements snsapi_userinfo. When I wrote this article, I was actually confused because I did not debug successfully, but I repeatedly checked the program and ideas and there was no problem, because I used Testing the official account, a guy in the group said that he used the test official account before debugging and encountered the same problem as me, and then he just changed to the official official account. And I have repeatedly checked the WeChat development documentation. The snsapi_userinfo method is simpler than snsapi_base and is easy to understand.

Let me describe the problem first. The method of snsapi_userinfo does not require us to follow the public account, so I clicked on the page address to jump without following it and it prompted me that I have not followed the test public account.

Implementation ideas

With the foundation of the previous article on web page authorization to obtain basic user information, it will be faster to implement snsapi_userinfo, adjusting the interface all the way.

1. Obtain the code

first. 2. Obtain the web page authorization access_token and openid based on the code. WeChat here has a limit on calling access_token, 12 times a day, so it is cached after getting the access_token.

3. Obtain user information based on access_token and openid.

Look at the code

 public ActionResult OAuthSnsApiUserInfo()  
 {        
 string code = Request.QueryString["code"];        
 try        
 {             
 if (!string.IsNullOrEmpty(code))             
 {                 
 OAuthToken oauthToken = HttpUtility.Get<OAuthToken>
 (string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code", appID, appsecret, code));
if (oauthToken != null && !string.IsNullOrEmpty(oauthToken.openid) && !string.IsNullOrEmpty(oauthToken.access_token))                    
{                        
OAuthUserInfo userInfo = Get
<OAuthUserInfo>(string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN", oauthToken.access_token, oauthToken.openid));
if (userInfo != null)                        
{                            
ViewData["headImage"] = userInfo.headimgurl;                            
ViewData["openid"] = userInfo.openid;                            
ViewData["nickName"] = userInfo.nickname;                            
if (userInfo.sex == 0)                            
{                                
ViewData["sex"] = "未知";                            
}                            
else if (userInfo.sex == 1)                            
{                                
ViewData["sex"] = "男";                            
}                            
else                            
{                                
ViewData["sex"] = "女";                            
}                            
ViewData["province"] = userInfo.province;                            
ViewData["city"] = userInfo.city;                        
}                        
else                        
{                        
}                    
}                    
else                    
{                           
}                
}                
else                
{                    
return Redirect(string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope=snsapi_userinfo&state=123456
#wechat_redirect", appID,Server.UrlEncode("http://" + Request.Url.Host + Url.Action("OAuthSnsApiUserInfo"))));             
}        
}       
catch (Exception ex)      
{            
ViewData["errmsg"] = ex.Message;      
}                  
return View(); 
}

Summary

The interface for obtaining user information in the web page authorization interface is: https://api.weixin.qq.com /sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN.

Reference

http://www.cnblogs.com/net-xiejun/p/4632711.html

http://www. cnblogs.com/txw1958/p/weixin76-user-info.html

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