Is there a way to ensure that any updates made to the backend database are immediately visible in the browser?

Currently, I am facing an issue with my hardware scanner that is connected to a Windows computer. Whenever I scan an item using the hardware scanner, the Windows computer retrieves the price/information about that specific item. Then, I manually input this price into my database through a Windows program or C# program.

Furthermore, I have a web application that shares the same database as the C# program mentioned earlier. This web application needs to be open simultaneously while I conduct the scanning process. It is crucial for any changes made to the database to be instantly reflected in the web browser when I perform a scan.

I am wondering whether JavaScript technology (or any other relevant technology) can help achieve this real-time synchronization between the actions of scanning and updating the web browser display. Is this feasible?

Thank you for your assistance.

javascriptdatabasewindowsbrowser

Answer №1

If your web application, hosted on a server with access to the database and capable of receiving notifications about changes, you could implement an HTTP Persistent (also known as Keep-Alive) connection to push real-time updates to the browser for processing by JavaScript.

For more information on HTTP persistent connections, visit: http://en.wikipedia.org/wiki/HTTP_persistent_connection

Additional details can be found here: Persistent connection with client

Answer №2

To ensure real-time updates on the webpage, it is essential to establish a continuous TCP socket connection between the server and the webpage. Whenever there is a database update, the server can send a notification message through this socket to inform the webpage to refresh its content.

If you are looking for potential solutions to implement this feature, I highly recommend exploring node.js as a viable option.

Here is a helpful resource on how to communicate over TCP sockets using JavaScript

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