How to realize the login function of QR code scan code in C #

This article mainly explains "how to realize the QR code scanning login function of C#". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "C# how to achieve QR code scanning login function"!

The implementation of client code scan login is divided into the following four steps:

1. Generate QR code on Web page

The generated QR code must contain data that uniquely identifies the user, which is to ensure that the client (mobile phone) is bound to the web page to prevent others from logging in to your account. Here you can generate a random guid as a unique identity.

To generate a QR code, you can use the jQuery qrcode plug-in.

two。 Client scans QR code

The client needs to verify whether the account has been logged in before scanning the QR code, and if not, the user needs to be prompted to log in first. If you are already logged in, you should read the unique ID guid after scanning the QR code and send the sessionID to the background server (such as Java).

3. Actively inform web of successful login through GoEasy server

After receiving the request, the background server actively pushes the sessionID to the web web page with the same unique identity through GoEasy.

GoEasy backend real-time push to web

C # realization of QR Code scanning Login

4. Web browser sets the cookie information related to login

The Web browser receives the message including the login-related sessionID, and the browser can add the cookie to the browser through the javascript code, which means that the browser has completed the login.

At this point, I believe you have a deeper understanding of "how to realize the QR code scanning login function in C#". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!