Retrieve information from an SQL database using user input in a Classic ASP form without the need to refresh the page

Currently, I am in the process of incorporating a new function into an existing Classic ASP system. This feature involves allowing users to scan a barcode that will automatically populate a text field within a form inside a bootstrap modal. The scanner has been set up to transmit a TAB input following the scanned data.

My main requirement is to execute a database query when the field is exited and fill other fields in the modal with information retrieved from the query based on the scanned value. It is crucial for this process to occur without refreshing the page or closing the modal so the user can review the details and make any necessary changes before submitting the form.

What would be the most effective approach to achieve this? While I am comfortable creating the stored procedure (SP) needed for the task, I am unsure about how to initiate the call to the SP and receive its output. Would it be feasible to utilize JavaScript/PHP for these purposes?

Answer №1

To implement this functionality, utilizing AJAX is essential.

Explore more about AJAX here

The process involves sending a request to your .asp script to execute the stored procedure and then using Response.Write to send back a response.

Subsequently, you will need to interpret this response using jQuery.

Comparatively to ASP Classic, AJAX integrates better with JSON due to being a relatively recent technology.

Although there are limited options for JSON libraries,

You may consider using json2.asp:

Access json2.asp for JSON functionalities here

Alternatively, if preferred, XML can be utilized; however, it is less favored nowadays and requires more effort for parsing.

Regarding PHP, it is worth mentioning that it provides pre-built features like:

Learn more about PHP's JSON encoding capabilities here

This guidance should aid you in implementing the desired solution.

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