MVC WeChat webpage authorization to get user OpenId, mvc to get openid

Last Update:2016-10-11 Source: Internet

Author: User

Tags openid

Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

MVC web page authorization to obtain the user's OpenId, mvc to obtain the openid

I recently developed a public platform and made a record. I have also developed it before. I forgot about this development. After half a day, I 'd better take a note.

Note that the framework is used to develop a public platform for MVC. The scenario is to obtain the user's openid on the template page. To verify the page, you can integrate the template page.

Add the following code to _ Layout. cshtml:

Add the GetOpenID method to the AdminUtil class.

<head>

<title>@ViewBag.Title - My ASP.NET Application</title>

@Styles.Render("~/Content/css")

@Scripts.Render("~/bundles/modernizr")

[H]

var code = HttpContext.Current.Request["code"];

Log.logmsg(code);

string urlpath = HttpContext.Current.Request.Url.AbsoluteUri.ToString();

ViewBag.at = AdminUtil.GetOpenID(urlpath, code);

}

</head>

Add getopenid method to adminutil class

#Region get openid

/// <summary>

///Get openid

/// </summary>

public static string GetOpenID(string redirect_url, string code)

{

string AppID = WXModel.AppID;

string AppSecret = WXModel.AppSecret;

string openid = "";

openid = WXApi.GetOpenID(AppID, redirect_url, code, AppSecret);

return openid;

}

#endregion

Add getopenid method to class wxapi

#Region get openid

/// <summary>

///Get openid

/// </summary>

public static string GetOpenID(string appid, string redirect_url, string code, string screct)

{

string strJson = "";

if (string.IsNullOrEmpty(code))

{

redirect_url = HttpUtility.UrlEncode(redirect_url);

HttpContext.Current.Response.Redirect(string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope=snsapi_base&state={2}#wechat_redirect",

appid, redirect_url, new Random().Next(1000, 200000).ToString()));

}

Else

{

strJson = HttpRequestUtil.RequestUrl(string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code",

appid, screct, code));

}

return Tools.GetJsonValue(strJson, "openid");

}

#endregion

public static class WXModel

{

public static string access_token;

public static string AppID;

public static string AppSecret;

}

/// <summary>

///Tools

/// </summary>

public class Tools

{

#Region gets the value of a node in the JSON string

/// <summary>

///Get the value of a node in JSON string

/// </summary>

public static string GetJsonValue(string jsonStr, string key)

{

string result = string.Empty;

if (!string.IsNullOrEmpty(jsonStr))

{

key = "\"" + key.Trim('"') + "\"";

int index = jsonStr.IndexOf(key) + key.Length + 1;

if (index > key.Length + 1)

{

//Truncate the comma first, and if it is the last, truncate the "," sign, and take the minimum value

int end = jsonStr.IndexOf(',', index);

if (end == -1)

{

end = jsonStr.IndexOf('}', index);

}

result = jsonStr.Substring(index, end - index);

Result = result.trim (New char [] {',', '\'}); / / filter quotes or spaces

}

return result;

}

#endregion

}

public class HttpRequestUtil

{

#Region request URL, do not send data

/// <summary>

///Request URL, do not send data

/// </summary>

public static string RequestUrl(string url)

{

return RequestUrl(url, "POST");

}

#endregion

#Region request URL, do not send data

/// <summary>

///Request URL, do not send data

/// </summary>

public static string RequestUrl(string url, string method)

{

//Set parameters

HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

CookieContainer cookieContainer = new CookieContainer();

request.CookieContainer = cookieContainer;

request.AllowAutoRedirect = true;

request.Method = method;

request.ContentType = "text/html";

request.Headers.Add("charset", "utf-8");

//Send request and get corresponding response data

HttpWebResponse response = request.GetResponse() as HttpWebResponse;

//It is not until the request.getresponse() program that the post request is sent to the target web page

Stream responseStream = response.GetResponseStream();

StreamReader sr = new StreamReader(responseStream, Encoding.Default);

//Return result page (HTML) code

string content = sr.ReadToEnd();

return content;

}

#endregion

}

Note: the authorization callback domain needs to be set in the public platform

The above is the whole content of this article. I hope it will help you in your study, and I also hope you can support the help home.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More